CN107832931A - A kind of Modularity analysis method of plain river network region waterlogging risk - Google Patents
A kind of Modularity analysis method of plain river network region waterlogging risk Download PDFInfo
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Abstract
A kind of Modularity analysis method of waterlogging risk suitable for plain river network region different scale region of the invention, the analysis subject area modules database related to waterlogging risk can be established by the analysis method, handled by Data generalization, module coupling and multidimensional simulation are run, can quantitative analysis waterlogging risk area depth of accumulated water and the ponding time, and export waterlogging risk class zoning.Basic foundation can be provided for municipal drainage and waterlogging facility layout and sponge infrastructure layout.
Description
Technical field
The present invention is a kind of Modularity analysis method of plain river network region waterlogging risk, suitable for plain river network region not
With the Modularity analysis of the waterlogging risk of dimensional area, belong to municipal drainage prevention waterlogging As-Is Assessment method field.
Background technology
With the fast development of the continuous aggravation and urbanization of Global climate change, the extreme flood in city occurs
The frequency is more frequent, and coverage also gradually expands.In recent years, with the quickening of Chinese Urbanization and process of industrialization, largely
The Flood Pondage Action space such as City woods, lake is tied up, and municipal drainage Facilities Construction lags behind urban development speed and is not good for
Full city calamity risk management system so that China's urban waterlogging the condition of a disaster shows the spy of complexity, diversity and amplification
Point.How on the basis of urban waterlogging formation mechanism of disaster risk-assessment to be carried out to urban waterlogging disaster, and proposed a set of
Urban waterlogging calamity source tackles technological frame, has become the hot issue of City Disasters research field urgent need to resolve.
At present, urban waterlogging risk assessment is still in research and discovery, and the method for assessment mainly has：History the condition of a disaster mathematics
Statistical estimation method, index system Evaluation Method and Scene Simulation Evaluation Method.Scenario models appraisal procedure can be directly perceived, high in three kinds of methods
The coverage and degree of Disaster Event caused by reflecting to precision the Flood inducing factors of certain probability, can accurately reflect disaster
The spatial distribution characteristic of risk.This method is according to hydro science principle, by establishing water-well drilling, by means of GIS skills
Art, computer technology and mechanics of communication, relief model, rainfall model, drainage model and terrain surface specifications model are established, simulate waterlogging
It is a kind of high-precision, visual, dynamic waterlogging methods of risk assessment in the scene of generation.Based on Scene Simulation waterlogging wind
The coverage and journey of Disaster Event caused by dangerous Evaluation Method can intuitively, accurately reflect the Flood inducing factors of certain probability
Degree, can accurately reflect the spatial distribution characteristic of calamity source, be highly suitable for the waterlogging risk assessment in city.The method energy
Enough with basis be that the process of the simulation of model is that rainwater exists in survey region using the ripe hydrology and hydraulic model
Time and distribution spatially, the factor being related to include urban storm intensity, raindrop type, Underlying Surface Data, Storm Sewer Network and
The data of auxiliary facility data and receiving water body.In terms of the exploitation of model, more ripe model has Denmark's waterpower to grind at present
Study carefully developed MIKE URBAN and MIKE FLOOD coupling models, the InfoWorks of HR Wallingford companies of Britain
ICM models, the SWMM models of Environmental Protection Agency exploitation, and SewerGEMS models of Bentley company exploitation etc..
Because Scene Simulation Evaluation Method process is complicated and changeable, the requirement to basic data is high, and is directed to different characteristics
City and region, its analysis method also varies.For plain river network region, it is also desirable to there is one kind targetedly to innovate
Analysis method comprehensive assessment its occur waterlogging risk.
The content of the invention
It is an object of the invention to provide a kind of Modularity analysis method of plain river network region waterlogging risk, for Plain
Dense waterway net region, the risk of its generation waterlogging of comprehensive assessment.
To achieve these goals, technical scheme is as follows：A kind of module of plain river network region waterlogging risk
Change analysis method, it is characterised in that this method includes six modules：
Landform module, the landform module are formed by the combination of numerous elevation point datas；
Hydraulic module, the hydraulic module extract nodal community by pipeline surveying data or infrastructure data：Compile
Number, system type, coordinate, shaft bottom elevation, and pipeline attribute：Topological relation, length, shape, Width x Height, roughness；Pass through
Pipeline upstream and downstream node serial number establishes spatial topotaxy, current foundation based on one-dimensional Saint-venant Equations inside pipeline
Hydrodynamics and calculation is carried out, it is accurate to simulate backwater and overflow phenomena；
Hydrology module, reflection subset pool characteristic, the attribute information with space characteristics, including it is water catchment area area, impermeable
Water rate, mean inclination and cross flow width；
Water conservancy project module, the information material of all kinds of water conservancy project structures is collected, input hydraulic facility and the relevant parameter of equipment, it is first
The coordinate of its connecting node in a coordinate system is first determined, determines annexation, is carried out afterwards according to structures operation control method
Facility attribute is set；
Network of waterways module, the network of waterways is determined by the setting of river course center line, cross-sectional line, bank line, coordinate, topological relation
Base attribute, annexation and river course trend, to simulate the network of waterways and detention basin of complexity, including dendritic, bifurcated sum
The loop network of waterways, and the detention basin protected by dykes and dams or flood bank, the water in the network of waterways can pass through connected mode and occur with extraneous
UNICOM is with exchanging；
Rainfall module, rainfall module are used to simulate actual rainfall or design rainfall；
This method includes four flows：
Data acquisition flow, for obtaining hydrology module, landform module, rainfall module, hydraulic module, water conservancy project module and river
Initial data needed for net module；
Generalization analysis process, the extraction and excavation of row information are entered on the basis of data acquisition flow collects data, is integrated
The data format that can be identified as above-mentioned module；
Module couples flow, and hydraulic module, hydrology module, rainfall module three intercouple, and carries out One Dimension Analysis：Drop
Rain drops to hydrology module after removing evaporation, and rainfall is converted into earth's surface by the mode of confluxing of the production by being defined on hydrology inside modules
Runoff, rainwash enter respective tube road, i.e. hydraulic module according to the division in subset pool, pass through waterpower inside hydraulic module
Calculation formula carries out water force in pipe, forms one-dimensional model；
One-dimensional model coupling landform module, network of waterways module, water conservancy project module form two dimensional model, carry out two-dimension analysis：That is water
Power end of module couples with network of waterways module, and pipe end goes out stream and enters river course, and river water level lifting again can be to pipeline water flow inside
Backwater effect is produced, influences pipeline water flow discharge, when river water level rises to peak level, pipe outlet can not continue to arrange
Water, spilling water is produced at node, current form two-dimentional ponding in two dimensional terrain module, so as to carry out waterlogging risk point
Analysis；
Multidimensional operational process, multidimensional simulation analysis is carried out using above-mentioned module coupling flow.
Further, in module coupling flow, rainfall module is passed through by surveying rainfall or designing the typing of rainfall data
The setting of production stream surface properties, is converted into rainwash and enters hydraulic module or network of waterways module.
Further, in module coupling flow, subset pool division is carried out according to the hydraulic module of foundation, in subset pool
Land use pattern defined in attribute list, production are confluxed mode, production stream surface type and related runoff coefficient, so as to by hydrology module
Coupled with hydraulic module；The model of the two coupling can carry out pipe drainage capability analysis and the analysis of node water level：Hydrology mould
Rainfall is changed into rainwash and enters hydraulic module by block, and hydraulic module carries out transferring for current by hydraulic calculation formula, if
Overflowed beyond pipe drainage ability current from node.
Further, landform module is confluxed surface elevation by each inspection shaft in hydraulic module and hydrology module, pipeline, production
The extraction of point data is combined with one-dimensional model, while selects one-dimensional production by the set-up mode difference of hydrology module attribute information
Pattern of confluxing or two dimension produce pattern of confluxing；Hydraulic module and hydrology module can carry out the unrestrained water process simulation of two dimension, when in pipeline
The water of storage exceeds its discharge capacity, and current will spill into landform module from node, and two-dimentional product is differently formed according to landform
Water, carry out waterlogging risk analysis.
Further, network of waterways module is combined by flap valve form with waterpower and hydrology module, and the current in pipeline unidirectionally lead to
Cross flap valve and enter river course, after network of waterways module is coupled with waterpower hydrology module, current unidirectionally enter river course, and river water level rises
Backwater effect is produced to discharge outlet connecting pipe, water level in pipeline is increased, increase discharge is difficult, when river water level main road highest
When, pipeline can not continue draining to river course.
Further, water conservancy project module is usually expressed as several independences or the water conservancy project structure connected each other, structures lead to
Often it is present in the form of connection in model, the determination building topology relation of point coordinates is connected by upstream and downstream, water conservancy project module can
To connect hydraulic module or network of waterways module, hydraulic module and the network of waterways can also be connected simultaneously.
Further, this method also includes：Result output flow is simulated, in one-dimensional model, according to pipeline whether in super
Load condition carries out drainability assessment, and the overload state parameter of model generation is formed into pipe drainage capability result plane
Figure；Six big modules are combined together in two dimensional model, ponding data are with the area of 2D mesh points, the depth of water, ponding time
Present, form survey region flooding time and couple figure with depth of immersion result, waterlogging risk analysis is carried out to whole survey region.
The present invention has advantages below：
1) invention is directed to the water system feature of plain river network region, important function of the prominent network of waterways during water drainage, fits
Waterlogging risk analysis for plain river network region different scale region；
2) ArcGIS systems and hydraulic model software are coupled by the invention, by GIS platform to by plain river network region
Big drainage system (network of waterways) and small drainage system (pipe network) rationally generally change and couple, the waterpower of structure waterlogging risk analysis
Model；
3) dynamic setting can be achieved in six big modules in the invention, can be applied individually to the one-dimensional pipe network system of target area
System simulation and the simulation of the one-dimensional network of waterways, can also couple landform and apply to waterlogging risk analysis, while can simulate different condition of raining feelings
Waterlogging risk situation under condition；
4) modules structure and coupling are focused in the invention, and disparate modules, which carry out coupling, can run the analysis of output diversification
As a result, output result is vivid, directly perceived various, and operation strategies are extensive.
Brief description of the drawings
Fig. 1 is the flow chart of the present invention.
Fig. 2 is the flow chart of a specific embodiment of the invention.
Fig. 3 is the operation result that intercouples of six big modules of the invention
Module coupled interface schematic diagram according to embodiments of the present invention Fig. 4；
Dry run result output figure according to embodiments of the present invention Fig. 5；Wherein Fig. 5 a are pipeline node water level analysis knot
Fruit output figure, Fig. 5 b are city waterlogging risk analysis structure output figure.
Embodiment
Below according to specific embodiment of the invention, the present invention will be described in detail.
The present invention includes six big modules
(1) landform module
By landform field survey result, formed by the combination of numerous elevation point datas and formed, three-dimensional elevation point form
Using X-coordinate, Y-coordinate, corresponding points Z elevations as major way, continuous three-dimensional elevation point data forms complete ground model.Or
Continuous contour is formed by field survey altitude data, the intactly face mould formed according to contour line position and altitude data
Type.
With road site engineering absolute altitude (information in CAD diagram paper) for initial data in GIS platform, by individually extracting
These reliefs (multi-section-line, mark or point) import arcMAP platforms, point salt file of the generation with absolute altitude, to the key element
Enter row interpolation (inverse distance weighting, batten collimation method or triangular facet method may be selected, select triangular facet method here), it is continuous to obtain elevation
Curved surface, then elevation continuous curve surface is converted into elevation raster data, i.e. digital elevation model (DEM), and the shp files that are formed or
Elevation point data TXT formatted files store, and software corresponds to the elevation of x, y-coordinate by elevational point or contour lines recognition, so as to shape
Into the landform module of TIN forms.
(2) hydraulic module
By pipeline surveying data or infrastructure data, nodal community is extracted：Number (N), system type (rainwater, dirt
Water, interflow etc.), coordinate (x, y), shaft bottom elevation (z), pipeline attribute：Topological relation (upstream and downstream node number), length (L), shape
Shape, width (a), height (b), roughness (n).
Spatial topotaxy is established by pipeline upstream and downstream node serial number, current are inside pipeline with one-dimensional Saint-Venant equation
According to hydrodynamics and calculation is carried out based on group, they are a pair of conservation of mass and conservation of momentum equation, can completely be simulated
Hydraulics state in pipeline or channel is accurate to simulate backwater and overflow phenomena.
In formula：Q：Flow (m3/s)；A：Cross-sectional area (m2)；g：Acceleration of gravity (m/s2)；θ：Horizontal sextant angle (number of degrees)；
S0：The bed gradient；K：Conveying capacity (is calculated) using Ke Lieboluoke-White or Manning formula
(3) hydrology module
Reflect in model subset pool characteristic, have space characteristics attribute information include water catchment area area, Impervious surface coverage,
Mean inclination and cross flow width.The catchment area in subset pool division when determine, mainly according to survey region landform,
River course distribution etc. is divided for primary condition using Thiessen polygon method, selects the polygon that intersecting pipeline is formed as division
Unit, finds out the perpendicular bisector of each edge, and connection perpendicular bisector intersection point forms irregular polygon with pipeline node and is
Thiessen polygon, the area of each Thiessen polygon are the area in the pipeline section corresponding subset pool.
The Impervious surface coverage in subset pool is according to data situation (can be according to target area landform figure or high definition satellite image map)
Extraction, for convenience of data processing and input, carries out classification processing, differential is 5%, the water surface by the subset pool Impervious surface coverage of extraction
Impervious surface coverage is 100%；The intensive place of urban architecture thing, Impervious surface coverage are 60%~70%；There are the square of greening, meadow in city
Deng Impervious surface coverage takes 20%；City and the joint portion in rural area, Impervious surface coverage take 40~50%；Farmland, rural area is according to earth's surface
The actual conditions of covering, Impervious surface coverage value between 5~20%.Can be to the underlay of target area by the identification of Impervious surface coverage
Face is parsed, and the runoff coefficient in each subset pool is calculated using following methods in generalized information system：
ψ i are runoff coefficient assignment corresponding to i-th kind of underlying surface in formula；α i are that i-th kind of underlying surface area accounts for total catchment area
Ratio；Fi is i-th kind of underlying surface area, and F is total catchment area；Part underlying surface runoff coefficient refers to value such as following table：
Underlying surface runoff coefficient value
After carrying out calculating processing after assignment and in generalized information system, the figure layer with each subset pool runoff coefficient can be exported
Attribute list, and prototype software is imported, now selection production Confluence Model computational methods.Hydrology inside modules couple different productions and confluxed
Model Calculating Method, e.g., the Runoff Model such as Horton, Green-Ampt, SCS, Wallingford, Large Catch, SWMM,
The Confluence Models such as Unit, rainfall is converted into rainwash by producing the way choice that confluxes, is discharged into pipe network.
For plain river network region, generally from Horton infiltration model as Runoff Model, permeable and half water impermeable surface is all
Horton models can be used, are typically expressed as the function of time correlation：
F=fc+(f0-fc)e-kt
Wherein：f0：Initial infiltration rate (mm/h)；fc：Final infiltration rate (mm/h)；k：Exponential term parameter (1/h)；It is accumulative to ooze
Penetration is：
Confluence Model generally selects SWMM Confluence Models, this be by the U.S. develop Confluence Model, generally with Horton
Osmole type is used in combination, be broadly divided into just wall losses, runoff volume, converge flow rate calculation three parts, using nonlinear reservoir with
Kinematic wave equations calculate.
Non-linear reservoir equation is as follows：
Wherein：t：Simulated time (min)；Gt：Corresponding time outflow (m3/s)
G0：Initial outflow, a, b are the parameter calculated according to local circumstance, and the computational methods are prior art, herein
Repeat no more.
(4) water conservancy project module
The information material of all kinds of water conservancy project structures is collected, the relevant parameter of hydraulic facility and equipment is separately input into mould
Type, it is first determined the coordinate of its connecting node in a coordinate system, annexation is determined, afterwards according to structures operation control method
Carry out facility attribute setting.Following table is main water conservancy project structure required input property value.
| Structures | Input attribute |
| Pump | Upstream and downstream node number, bottom elevation, open and close water level, open and close delay, pump capacity |
| Lock | Upstream and downstream node number, bottom elevation, width, flow, open height, gate depth |
| Weir | Upstream and downstream node number, crest level, width, flow |
(5) network of waterways module
By river course center line, cross-sectional line, bank line, coordinate, topological relation setting determine the network of waterways base attribute,
Annexation and river course trend, to simulate the network of waterways and detention basin of complexity, including dendritic, bifurcated the and loop network of waterways,
And the detention basin protected by dykes and dams or flood bank, the water in the network of waterways can pass through connected mode with the extraneous UNICOM that occurs with handing over
Change.
GIS spatial data system is established in ArcGIS according to network of waterways census data data first, provides the network of waterways in plane
On distribution characteristics, orient river course start-stop point coordinates (x, y), river confluence coordinate (x0,y0), and establish network of waterways topology
Relation, the form of fracture and size of each subsegment are determined afterwards, export the shp files of the network of waterways plane distribution attribute of target area；
Shp files with network of waterways plane distribution structure attribute are imported into model in the form of open channel, inputted in a model
Section information creates section (section is provided in the form of coordinate offset and elevation), will by the function that open channel is turned to river course in model
The open channel of importing changes into river course, afterwards delete section only retain river channel cross section line, by ArcGIS generation shp files again
River course center line is imported in the form of river course center line, cross-sectional line is together in series, ultimately produces channel boundary, is formed complete
Network of waterways model.
(6) rainfall module
Rainfall module can simulate actual rainfall or design rainfall, actual rainfall are arranged and shape by local measured data
Into the rainfall data-sequence form formed with rain time (t) and rainfall (H) is presented.
Design rainfall can select different designs form according to the difference of region, and Chicago rain is typically selected in CHINESE REGION
Type, local Rain Intensity Formula Based and repetition period of rainfall (P), rain peak coefficient (r) need to be given.
Wherein rainfall pattern calculation formula in Chicago is：
Before peak
Behind peak
In formula, A=A1(1+c lg P), A1, b, c, n be Rain Intensity Formula Based in parameter, P is repetition period of rainfall, and t is
Rainfall duration.
According to《Code for design of outdoor sewerage engineering (GB50014-2006)》Waterlogging preventing and treating design reappears specified in (2016 editions)
Phase, determine repetition period of rainfall corresponding to survey region.
Waterlogging prevents and treats Designed recurrence period
According to《Cities and towns waterlogging Prevention Technique specification》(GB51222-2017) rule of rainfall duration are selected in design rainfall pattern
It is fixed, consider the current actual conditions in China, it is specified that rainfall duration, 3-24h can be selected.Therefore according to local conditions, recommend
Design rainfall duration is 3h Chicago rainfall pattern.
Rainfall module is embedded simulating actual rainfall with the operation of model, and hydrology module process is coupled in rainfall
Produce Process of Confluence and form rainwash.
The contact that six big module of the above is established between it by five big flows, drawn accordingly by generally changing, coupling and running
Sunykatuib analysis result.
It is the explanation of five big flows below：
(1) data acquisition flow
Data acquisition technology include investigation on the spot, data conformity, in real time monitoring, structure GIS-Geographic Information System extraction data and
Topological relation, using remote sensing technology analysis extraction etc., local computer or LAN internal server is stored in, with generalized information system
Shp files, CAD diagram shape, Excel forms, Access databases or various forms of model results are main data mode, are used for
(including ttom of pipe table is high, pipeline slope for the ground mulching type of planning region, landform altitude value, short duration rainfall data, pipe network data
Degree, length and pipeline specifications etc.), pumping plant and Xu Koushuizha, the data such as network of waterways information, hydrology module, landform mould are served respectively
Block, rainfall module, hydraulic module, water conservancy project module and network of waterways module.
(2) analysis process is generally changed
Generalization analysis is that the extraction and excavation of six big category informations are carried out on the basis of data are collected, general using different software
Change and be integrated into the data format that model can identify.Terrain data can extract height value and identify gridding by ArcGIS
Afterwards, landform module can be generalized as；Ground mulching type can be generalized as hydrology mould by carrying out classification assignment after remote sensing recognition
Block；Short duration rainfall data can be generalized as short duration raindrop type, can establish rainfall mould by Chicago rainfall pattern method statistical analysis
Block；Pipe network, water conservancy project information can be by survey system typing ArcGIS, and after being handled in prototype software, are generalized as waterpower
Module and water conservancy project module；River channel information is moved towards by river course, the typing of section information, and is generalized as open channel, passes through bank line
Foundation forms network of waterways module.Module, which is generally changed, to form six big independent plates, and establishing the contact of intermodule then needs to flow by coupling
Journey.
(3) module coupling flow
1) rainfall module flows the setting of surface properties by producing, turned by surveying rainfall or designing the typing of rainfall data
Turn to rainwash and enter hydraulic module or network of waterways module (in one-dimensional model), and landform module (in two dimensional model),
Rainfall module is the basis of all simulations；
2) subset pool division is carried out according to the hydraulic module of foundation first, the soil profit defined in the attribute list of subset pool
With type, mode of confluxing, production stream surface type and related runoff coefficient are produced, so as to which hydrology module be coupled with hydraulic module.
The model of the two coupling can carry out pipe drainage capability analysis and the analysis of node water level：Hydrology module is by rainfall
It is changed into rainwash and enters hydraulic module, hydraulic module carries out transferring for current by hydraulic calculation formula, if exceeding pipeline
Drainability current overflow from node；
3) landform module is combined by the conflux extraction of surface elevation point data of each inspection shaft, pipeline, production with one-dimensional model,
Simultaneously can different to select, pattern be confluxed in one-dimensional production or two dimension production is confluxed mould by the set-up mode of hydrology module attribute information
Formula；The two combination can carry out the unrestrained water process simulation of two dimension, and when the water stored in pipeline exceeds its discharge capacity, current will be from
Node spills into landform module, according to the two-dimentional ponding that is differently formed of landform, carries out waterlogging risk analysis；
4) network of waterways module can have diversified forms to be combined with waterpower and hydrology module, and most-often used is the form of flap valve,
Current in pipeline unidirectionally can enter river course by flap valve, and after network of waterways module is coupled with waterpower hydrology module, current can be with
Unidirectional to enter river course, river water level rises produces backwater effect to discharge outlet connecting pipe, water level in pipeline is increased, increase row
Difficulty is put, when river water level main road highest, pipeline can not continue draining to river course；
5) water conservancy project module is usually expressed as independence one by one or the water conservancy project structure connected each other, and structures are generally with connection
Form be present in model, the determination building topology relation of point coordinates is connected by upstream and downstream, water conservancy project module can connect water
Power module, network of waterways module can be connected, while hydraulic module and network of waterways module can also be connected.So far, six big modules are organic
Ground combines, and forms complete model, calls outside computing engines to carry out the simulation of model on this basis and calculates.
(4) multidimensional operational process
By three above step, by computer software computing engines can be called to carry out multidimensional simulation analysis, and export
As a result.
To sum up, hydraulic module, hydrology module, rainfall module three intercouple, and can carry out One Dimension Analysis：I.e. rainfall removes
Hydrology module is dropped to after evaporation, rainfall is converted into rainwash by the mode of confluxing of the production by being defined on hydrology inside modules,
Rainwash enters respective tube road, i.e. hydraulic module according to the division in subset pool, passes through water force inside hydraulic module
Formula carries out water force in pipe, forms one-dimensional model, and one-dimensional model can carry out pipe drainage capability analysis, node water level point
Analysis etc..
One-dimensional model coupling landform module, network of waterways module, water conservancy project module formation two dimensional model can carry out two-dimension analysis：That is water
Power end of module is coupled by connected modes such as flap valves with network of waterways module, and pipe end goes out stream and enters river course, river water level lifting
Backwater effect can be produced to pipeline water flow inside again, influence pipeline water flow discharge, when river water level rises to peak level, pipe
Road outlet can not continue draining, and spilling water is produced at node, and current form two-dimentional ponding in two dimensional terrain module, so as to
Carry out waterlogging risk analysis.Here two dimension is to consider while consider pipe network and earth's surface production Process of Confluence.
In multidimensional operation, calibration checking is carried out to obtained result, if being unsatisfactory for error range, changes six big modules
In parameter, module coupling and multidimensional operation are re-started, until obtained result meets error range.
(5) analysis results export
In one-dimensional model, three big modules have been coupled, drainability assessment is carried out according to whether pipeline is in overload state,
The overload state parameter that model generates is exported into shp files and imports ArcGIS, by the analyzing and processing function of generalized information system,
Form pipe drainage capability result plan.
Six big modules are combined together in two dimensional model, ponding data are with the area of 2D mesh points, the depth of water, ponding
Time is presented, and result output is imported in ArcGIS into shp files and counted, and waterlogging venture entrepreneur grade is assessed according to multiple-factor method
Statistical analysis standard is determined, survey region flooding time is formed and figure is coupled with depth of immersion result, or as rain time changes
Depth of the water submerging animated video, to whole survey region carry out waterlogging risk analysis.
Model output result visualizes, and can be used as Correlative plan base map, is transformed for drainage system, waterlogging system facility layout
Foundation is provided.
Involved term is the Essential Terms of this area in the present invention, and those skilled in the art says according to the present invention
The content of bright book description should be understood that and realize technical scheme.Specific explanations on being directed to term exist
This is repeated no more.
Claims (7)
- A kind of 1. Modularity analysis method of plain river network region waterlogging risk, it is characterised in that this method includes six modules：Landform module, the landform module are formed by the combination of numerous elevation point datas；Hydraulic module, the hydraulic module extract nodal community by pipeline surveying data or infrastructure data：Number, be System type, coordinate, shaft bottom elevation, and pipeline attribute：Topological relation, length, shape, Width x Height, roughness；By on pipeline Downstream node numbering establishes spatial topotaxy, and foundation enters water-filling to current based on one-dimensional Saint-venant Equations inside pipeline Dynamics calculation is accurate to simulate backwater and overflow phenomena；Hydrology module, reflection subset pool characteristic, the attribute information with space characteristics, including water catchment area area, Impervious surface coverage, Mean inclination and cross flow width；Water conservancy project module, the information material of all kinds of water conservancy project structures is collected, input hydraulic facility and the relevant parameter of equipment, first really The coordinate of its fixed connecting node in a coordinate system, determines annexation, carries out facility according to structures operation control method afterwards Attribute is set；Network of waterways module, the basic of the network of waterways is determined by the setting of river course center line, cross-sectional line, bank line, coordinate, topological relation Attribute, annexation and river course trend, to simulate the network of waterways and detention basin of complexity, including dendritic, bifurcated and loop The network of waterways, and the detention basin protected by dykes and dams or flood bank, the water in the network of waterways can pass through connected mode and UNICOM occurs with extraneous With exchanging；Rainfall module, rainfall module are used to simulate actual rainfall or design rainfall；This method includes four flows：Data acquisition flow, for obtaining hydrology module, landform module, rainfall module, hydraulic module, water conservancy project module and network of waterways mould Initial data needed for block；Generalization analysis process, the extraction and excavation of row information are entered on the basis of data acquisition flow collects data, is integrated into The data format that above-mentioned module can identify；Module couples flow, and hydraulic module, hydrology module, rainfall module three intercouple, and carries out One Dimension Analysis：I.e. rainfall is gone Except hydrology module is dropped to after evaporation, rainfall is converted into earth's surface footpath by the mode of confluxing of the production by being defined on hydrology inside modules Stream, rainwash enter respective tube road, i.e. hydraulic module according to the division in subset pool, pass through potamometer inside hydraulic module Calculate formula and carry out water force in pipe, form one-dimensional model；One-dimensional model coupling landform module, network of waterways module, water conservancy project module shape Into two dimensional model, two-dimension analysis is carried out：I.e. hydraulic module end couples with network of waterways module, and pipe end goes out stream and enters river course, river Road water level promoting can produce backwater effect to pipeline water flow inside again, pipeline water flow discharge be influenceed, when river water level rises to most During high water level, pipe outlet can not continue draining, and spilling water is produced at node, and current form two dimension product in two dimensional terrain module Water, so as to carry out waterlogging risk analysis；Multidimensional operational process, multidimensional simulation analysis is carried out using above-mentioned module coupling flow.
- A kind of 2. Modularity analysis method of plain river network region waterlogging risk as claimed in claim 1, it is characterised in that mould In block coupling flow, rainfall module is by surveying rainfall or designing the typing of rainfall data, by producing the setting of stream surface properties, It is converted into rainwash and enters hydraulic module or network of waterways module.
- A kind of 3. Modularity analysis method of plain river network region waterlogging risk as claimed in claim 1, it is characterised in that mould In block coupling flow, subset pool division is carried out according to the hydraulic module of foundation, the soil profit defined in the attribute list of subset pool With type, mode of confluxing, production stream surface type and related runoff coefficient are produced, so as to which hydrology module be coupled with hydraulic module；Two The model of person's coupling can carry out pipe drainage capability analysis and the analysis of node water level：Rainfall is changed into earth's surface by hydrology module Runoff enters hydraulic module, and hydraulic module carries out transferring for current by hydraulic calculation formula, if exceeding pipe drainage ability water Stream overflows from node.
- A kind of 4. Modularity analysis method of plain river network region waterlogging risk as claimed in claim 1, it is characterised in that mould In block coupling flow, landform module is counted by each inspection shaft in hydraulic module and hydrology module, pipeline, the production surface elevation that confluxes According to extraction combined with one-dimensional model, while select the one-dimensional production to conflux by the way that the set-up mode of hydrology module attribute information is different Pattern or two dimension produce pattern of confluxing；Hydraulic module and hydrology module can carry out the unrestrained water process simulation of two dimension, when being stored in pipeline Water exceed its discharge capacity, current will spill into landform module from node, be differently formed two-dimentional ponding according to landform, enter Row waterlogging risk analysis.
- A kind of 5. Modularity analysis method of plain river network region waterlogging risk as claimed in claim 1, it is characterised in that mould In block coupling flow, network of waterways module is combined by flap valve form with waterpower and hydrology module, and the current in pipeline unidirectionally pass through bat Door enters river course, and after network of waterways module is coupled with waterpower hydrology module, current unidirectionally enter river course, and river water level rises to row Mouth of a river connecting pipe produces backwater effect, water level in pipeline is increased, and increase discharge is difficult, when river water level main road highest, Pipeline can not continue draining to river course.
- A kind of 6. Modularity analysis method of plain river network region waterlogging risk as claimed in claim 1, it is characterised in that mould In block coupling flow, water conservancy project module is usually expressed as several independences or the water conservancy project structure connected each other, structures generally with The form of connection is present in model, and the determination building topology relation of point coordinates is connected by upstream and downstream, and water conservancy project module can connect Hydraulic module or network of waterways module are connect, hydraulic module and network of waterways module can also be connected simultaneously.
- 7. a kind of Modularity analysis method of plain river network region waterlogging risk as claimed in claim 1, it is characterised in that should Method also includes：Result output flow is simulated, in one-dimensional model, whether drainability in overload state is carried out according to pipeline Assess, the overload state parameter of model generation is formed into pipe drainage capability result plan；By six big moulds in two dimensional model Block is combined together, and ponding data are presented with the area of 2D mesh points, the depth of water, ponding time, is formed survey region and is flooded Time couples figure with depth of immersion result, and waterlogging risk analysis is carried out to whole survey region.
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