CN104200388A - Land selection method and land selection device - Google Patents
Land selection method and land selection device Download PDFInfo
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- CN104200388A CN104200388A CN201410469306.1A CN201410469306A CN104200388A CN 104200388 A CN104200388 A CN 104200388A CN 201410469306 A CN201410469306 A CN 201410469306A CN 104200388 A CN104200388 A CN 104200388A
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Abstract
The invention relates to the field of environments and discloses a land selection method and a land selection device. The land selection method includes the steps of A, acquiring land utilization data and ultramicro surface runoff data; B, utilizing the land utilization data and the ultramicro surface runoff data to do spatial topological analysis to different lands and different runoffs; and C, deriving all lands which share the same runoffs with plantation according to results of the spatial topological analysis. According to the 'source-runoff-convergence' system control theory, proper land can be selected accurately and comprehensively by analysis on the basis of the land utilization data and the ultramicro surface runoff data.
Description
Technical field
The present invention relates to environmental area, particularly the system of selection of a kind of soil and device thereof.
Background technology
Society, agricultural production has produced obviously and has coerced region environment under economic interests drive, and comprises that excessive applying pesticides and chemical fertilizer cause serious widespread pollution from the overuse of fertilizers and pesticides in rural area; Change land use structure, destroy the ecologic equilibrium of the ecosystem, ecosystem self-purification capacity reduces.In addition, artificial field management pattern also can affect Watershed Scale eco-environmental quality.
Widespread pollution from the overuse of fertilizers and pesticides in rural area control is China's ecologic environment area research focus always.The impact of the pollution of area source control under the mankind's activity watershed yardsticks such as different field management patterns, Land-Use is one of focus of current research.Geographic information system technology combines with pollution of area source model, on the one hand model newly developed predicted for widespread pollution from the overuse of fertilizers and pesticides in rural area, and the impact of various agricultural management measure watershed water quality and load; Apply on the other hand the pollution of area source of existing model watershed and assess, carried out a series of research and be introduced in practical application, obtained certain achievement.
Pollution of area source model is by being quantitatively described whole Drainage System and the inner complex process occurring thereof, identify its pollutant main source, transmission and migration path, analyze time and space characteristics that pollution of area source produces, calculate and subduing and loading and impact on water body of producing polluted in forecast, assessment soil utilization changes and difference is managed and the impact of technical measures opposite source pollutional load and water quality, for the ecological regulation and control of carrying out Agro-ecological System provides foundation.4 stages have roughly been experienced in the evolution of external pollution of area source model, i.e. empirical model, mechanism model, functional mode, and introduce 3S technology and probabilistic modified version model.American National Environmental Protection Agency website is listed 93 models for 2013.Wherein, SWAT (Soil and Water Assessment Tool) model is a kind of more conventional functional mode.
In prior art, because actual land data amount is huge, the relation of soil and runoff is also complicated and changeable, particularly runoff is widely distributed, article one, the upstream runoff of runoff is often numerous, cannot realize and select according to demand exactly suitable soil, adopt the reality that the words selected of artificial experience on the one hand cannot encompass complex, and its confidence level be also by unsatisfactory.In addition, prior art maturity model itself does not possess the ability of prediction Land Use/land cover (LUCC) yet.
Summary of the invention
The object of the present invention is to provide the system of selection of a kind of soil and device thereof, make accurately to find all sidedly suitable soil.
For solving the problems of the technologies described above, embodiments of the present invention provide the system of selection of a kind of soil, comprise following steps:
A. obtain land use data and ultra micro rainwash data;
B. utilize described land use data and described ultra micro rainwash data, each soil and each runoff are carried out to space topology analyzing;
C. derive all soils with common stream plantation according to the result of space topology analyzing.
Embodiments of the present invention also provide a kind of soil selecting arrangement, comprise with lower module:
Acquisition module, for obtaining land use data and ultra micro rainwash data;
Topological analysis module, for utilizing described land use data and described ultra micro rainwash data, carries out space topology analyzing to each soil and each runoff;
Detection module, for detection of the described space topology analyzing result in a soil whether for thering is common stream plantation;
Derive module, for deriving all soils, the soil of described derivation is that detection is that its space topology analyzing result is the soil with common stream plantation in described detection module.
Embodiment of the present invention in terms of existing technologies, the key distinction and effect thereof are: in soil selection course, introduce land use data and ultra micro rainwash data, face to soil and the line of runoff carry out space topology analyzing, and in analysis result, obtain suitable land data.Utilize " source-stream-remittance " systems control theory, make the selection in soil form a mathematical model, in the time selecting, only need to obtain all kinds of geodatas, can carry out comprehensively and topological analysis accurately each soil, make up and in prior art, carried out to the involutory adaptability of soil the accurately blank of screening.
As further improvement, described, each soil and each runoff to be carried out in the step of space topology analyzing, the topological analysis result of a described runoff comprises: the topological analysis result of all upstream runoffs to this runoff.
In topological analysis, runoff upstream and runoff itself are analyzed jointly, clearly in Runoff Analysis, needed to consider its source, make the analysis result in runoff and soil more accurate, situation more gears to actual circumstances.
As further improvement, in described step C, all soils with common stream plantation are derived in classification; Wherein, described classification comprises one of following or its combination in any: have common stream and the soil in abutting connection with plantation; There is common stream but not in abutting connection with the soil in plantation; Not only there is common stream and in abutting connection with plantation, but also there is common stream but not in abutting connection with the soil in plantation.
Further the result in topological analysis is classified, because actual environment complexity is various, suitable soil generally can also become various topological relations by Further Division, to find out the most suitable soil according to actual classification result, makes the soil that finds more applicable.
As further improvement, in described step B, also comprise following sub-step: obtain micro-subflow numeric field data; Divide each watershed according to described micro-subflow territory; In each watershed, utilize respectively described land use data and described ultra micro rainwash data, each soil and each runoff are carried out to space topology analyzing.According to charge for remittance principle, utilize micro-subflow numeric field data to carry out fractal calculation to the computer capacity of topological analysis, can not allow and recall ergodic algorithm and unrestrictedly search down, each that like this can be when analyzing is limited to a smaller space scale step by step, has greatly accelerated the time that soil is selected.
As further improvement, after described step C, also comprise following steps: the relevant plantation area that records each derivation soil.The relevant plantation area of deriving soil is kept a record, to provide foundation accurately to the later use of deriving soil.
Brief description of the drawings
Fig. 1 is according to the process flow diagram of soil system of selection in the first embodiment;
Fig. 2 a, Fig. 2 b and Fig. 2 c are respectively three kinds of situation schematic diagram with the soil in common stream plantation;
Fig. 3 is according to the process flow diagram of soil system of selection in the second embodiment;
Fig. 4 is according to the process flow diagram of soil system of selection in the 3rd embodiment;
Fig. 5 is according to the structural representation of soil selecting arrangement in the 4th embodiment;
Fig. 6 is according to the structural representation of soil selecting arrangement in the 6th embodiment.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.But, persons of ordinary skill in the art may appreciate that in the each embodiment of the present invention, in order to make reader understand the application better, many ins and outs are proposed.But, even without these ins and outs and the many variations based on following embodiment and amendment, also can realize the each claim of the application technical scheme required for protection.
The first embodiment of the present invention relates to a kind of soil and utilizes area evaluation method, and its flow process is as shown in Figure 1, specific as follows:
Step 101, obtains land use data.
Specifically, be to obtain land use data LUCC grouped data, LUCC grouped data is polygon (Ploygon) type facet vector data, the land use data providing for land resources department, the data that comprise all soils, by field, DLMC distinguishes.
Step 102, obtains ultra micro rainwash data.
Specifically, ultra micro rainwash vector (being called for short MinRiver) data are by the most tiny river in the basin of model generation.The effect of this key element has two, and one is to provide the foundation being communicated with the space of the two kinds of key elements in soil and plantation, and two are to provide the upstream and downstream topological relation between river, realizes recalling in sub-basin perimeter.Concentrate and exist attribute list to safeguard upstream and downstream relation at MinRiver factor data.
Step 103, carries out space topology analyzing to each soil and each runoff.
Specifically, the topological analysis result of a runoff is comprised: the topological analysis result of all upstream runoffs to this runoff.That is to say, in the topological analysis of a runoff, also need all upstream runoffs to this runoff simultaneously to carry out topological analysis.
It should be noted that, in topological analysis, can record the relation of runoff (line), plantation (face) and soil (face), in actual soil situation, taking plantation as tea place, soil is example as paddy field, is divided into following two kinds of relations:
1. flow altogether in tea place and paddy field: tea place and paddy field have a common runoff (comprising the upstream runoff of same runoff) to flow through;
2. does not flow altogether in tea place and paddy field, and tea place and paddy field do not have a common runoff to flow through.It is worth mentioning that, in present embodiment, finding suitable soil is to find to be applicable to accepting the paddy field that pollute in tea place, so when tea place and paddy field are altogether when flow relation, do not have the impact of pollution, does not do to consider so kind is related in present embodiment.
Step 104, judges whether a soil has common stream plantation; If so, perform step 105; If not, perform step 107.
Specifically, be exactly in the result of topological analysis, the analysis result of every a piece of land is judged, find out the soil with common stream plantation, namely find out the suitable soil that we need to search.
Step 105, derives this soil.
Specifically, can be type or other information that derives this soil, in present embodiment, the type using topological analysis result as this soil derives, as " having the native field in common stream plantation ".
Step 106, records the relevant plantation area in this soil.
Specifically, present embodiment is to record the total area in these all relevant plantations, soil, in actual applications, also can be as required, record respectively the each relevant plantation area in this soil.The relevant plantation area of deriving soil is kept a record, to provide foundation accurately to the later use of deriving soil.
It should be noted that, in this practical application, the relevant plantation area in the land type deriving in present embodiment and soil can be gathered and deposits in LUCC grouped data, its classification is done further to enrich, so that follow-up convenient application.
Step 107, has judged whether that other soils are without judgement; If so, return to execution step 104; If not, process ends.
Specifically, after a piece of land is judged, can return to step 104 and judge another a piece of land, and circulate with this, until all soils are all judged screening.
Present embodiment in terms of existing technologies, the key distinction and effect thereof are: in soil selection course, introduce land use data and ultra micro rainwash data, face to soil and the line of runoff carry out space topology analyzing, and in analysis result, obtain suitable land data.Utilize " source-stream-remittance " systems control theory, can form a mathematical model to the selection in soil, accelerating selection process, in the time selecting, only need to obtain all kinds of geodatas, can carry out comprehensively and topological analysis accurately each soil, make up and in prior art, carried out to the involutory adaptability of soil blank accurately selected.
The second embodiment of the present invention relates to the system of selection of a kind of soil.The second embodiment is the further improvement of doing on the basis of the first embodiment, main improvements are: further classified in the soil with common stream plantation filtering out in the first embodiment, to find out the most suitable soil according to actual classification result, make the soil that finds more applicable.
The present inventor's discovery, in actual conditions, the soil with common stream plantation is also divided into following three kinds of situations: as shown in Figure 2 a, have common stream and the soil (rear be called for short " Class1 ") in abutting connection with plantation 1.; 2. as shown in Figure 2 b, there is common stream but not in abutting connection with the soil in plantation (rear be called for short " type 2 "); 3. as shown in Figure 2 c, not only there is common stream and in abutting connection with plantation, but also there is common stream but not in abutting connection with the soil (rear be called for short " type 3 ") in plantation.It should be noted that, in above-mentioned each figure, shaded area part is soil, and white area portions is plantation, and lines AB and CD are respectively runoff.Type 3 wherein also can be called the soil with compound associations plantation.In actual applications, can design as required different Rule of judgment, derive dissimilar soil; In the present embodiment, be that three classes are divided respectively to rear derivation.
Method flow in present embodiment is as shown in Figure 3, specific as follows:
Step 201 is similar to step 104 with the step 101 in the first embodiment to step 204, does not repeat them here.
Step 205, judges whether a soil has the plantation of common stream and adjacency; If so, perform step 206; If not, perform step 207.
Specifically, due to through the judgement of step 204, enter the soil that step 205 judges and be the soil with common stream plantation, at this, with regard to their type of Further Division.
Step 206, judges whether a soil has common stream but the plantation of non-adjacency; If so, perform step 209; If not, perform step 208.
Specifically, knowing a soil when judgement is the plantation with common stream and adjacency, also needs further to judge whether this soil has common stream but the plantation of non-adjacency, further judges whether the type in this soil is type 3.
Step 207, this land classification type of mark is type 2.
Specifically, in the time judging that soil does not have the plantation of common stream and adjacency, can directly judge that soil has common stream but the plantation of non-adjacency, is type 2.
Step 208, this land classification type of mark is Class1.
Step 209, this land classification type of mark is type 3.
The resolution principle of step 208 and step 209 is identical with step 207.
Step 210 is similar to step 107 with the step 105 in the first embodiment to step 212, does not repeat them here.
Further the result in topological analysis is classified, because actual environment complexity is various, suitable soil generally can also become various topological relations by Further Division, to find out the most suitable soil according to actual classification result, makes the soil that finds more applicable.
The 3rd embodiment of the present invention relates to the system of selection of a kind of soil.The 3rd embodiment is the further improvement of doing on the basis of the first embodiment, and main improvements are: utilize micro-subflow numeric field data to carry out fractal calculation to the computer capacity of topological analysis, greatly accelerated the time that soil is selected.
In present embodiment, the process flow diagram of soil system of selection is as shown in Figure 4, specific as follows:
Step 401 is similar to step 102 with the step 101 in the first embodiment to step 402, does not repeat them here.
Step 403, obtains micro-subflow numeric field data.
Specifically, micro-subflow territory (SubWatershFlow) is polygon (Ploygon) type facet vector data, for limiting watershed.
Step 404, divides each watershed according to micro-subflow territory.
Specifically, according to charge for remittance principle, can not allow spatial shape analysis is unconfined to be searched down, spatial shape analysis and follow-up area estimation can be limited to a smaller space scale like this, the subflow territory, middle reaches in the effect major effect river of this restriction, the south in this subflow territory is to have the charge for remittance in other subflow territory to input.
Step 405 is carried out space topology analyzing to each soil and each runoff respectively in a watershed.
Specifically, the step 103 in this step and the first embodiment is similar, and the key distinction is, the space topology analyzing of this step only carries out in a watershed.
It is worth mentioning that, because the dividing line in micro-subflow territory is divided according to topographical crest, so when marking off after each watershed, will corresponding minimizing soil but the altogether relation of stream adjacent with plantation, further accelerate the speed of topological analysis.
Step 406 is similar to step 106 with the step 104 in the first embodiment to step 408, does not repeat them here.
Step 409, judges in this watershed whether have other soils without judgement; If so, return to execution step 406; If not, perform step 410.
Specifically, this step is also with the difference of step 107, only in a watershed, judges, has accelerated judgement speed.
Step 410, has judged whether that other watersheds are not by analysis; If so, return to execution step 405; If not, process ends.
Present embodiment is to consider that the data item that complete data set will build in when application is too many, therefore in the time recalling, cut to limit the data volume while searching initialization by subflow territory, reduce the data volume of each space topology analyzing, greatly accelerate analysis speed, accelerate soil and select speed, meanwhile, reduce the operand of system, also reduced system power dissipation.
It is worth mentioning that, in actual applications, if calculator memory is enough large, suggestion attempts directly in internal memory, setting up the runoff two-way search tree in whole basin, although need the more time when initialization, can realize the low time consumption degree of retrospective search.
Below taking plantation as tea place, soil is example as paddy field, in practical application, typically recall in model across subflow territory, the distribution of each upstream rainwash and the relation in each micro-subflow territory in whole upstream region on an outlet (basin central diameter flow export) point, this is one typical " tree " in the data structure of computing machine.And this tree is can be easier to realize search back-track algorithm; Recall after model in subflow territory in superposeed tea place and paddy field, can observe out paddy field and the tea place upstream and downstream incidence relation under rainwash effect clearly, analyze by the space topology between Ploygon-Ployline (face-line), Ployline-Ploygon (line-face), Ploygon-Ploygon (face-face), the back-track algorithm of joint tree data structure is realized paddy field and is searched.
Four embodiment of the invention relates to a kind of soil selecting arrangement, as shown in Figure 5, comprises with lower module:
Acquisition module, for obtaining land use data and ultra micro rainwash data.
Topological analysis module, for utilizing land use data and ultra micro rainwash data, carries out space topology analyzing to each soil and each runoff.Specifically, in topological analysis module, the topological analysis result of a runoff comprises: the topological analysis result of all upstream runoffs to this runoff.
Detection module, for detection of the space topology analyzing result in a soil whether for thering is common stream plantation.
Derive module, for deriving all soils, the soil of derivation is that detection is that its space topology analyzing result is the soil with common stream plantation in detection module.
Logging modle, for recording the relevant plantation area in each derivation soil.
Be not difficult to find, present embodiment is the device embodiment corresponding with the first embodiment, present embodiment can with the enforcement of working in coordination of the first embodiment.The correlation technique details of mentioning in the first embodiment is still effective in the present embodiment, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in present embodiment also can be applicable in the first embodiment.
It is worth mentioning that, each module involved in present embodiment is logic module, and in actual applications, a logical block can be a physical location, can be also a part for a physical location, can also realize with the combination of multiple physical locations.In addition, for outstanding innovation part of the present invention, in present embodiment, the unit not too close with solving technical matters relation proposed by the invention do not introduced, but this does not show not exist in present embodiment other unit.
Fifth embodiment of the invention relates to a kind of soil selecting arrangement.The 5th embodiment is the further improvement of doing on the basis of the 4th embodiment, main improvements are: further classified in the soil with common stream plantation filtering out in the 4th embodiment, to find out the most suitable soil according to actual classification result, make the soil that finds more applicable.
Specifically, the derivation module in present embodiment also comprises classification submodule, derives all soils with common stream plantation for classifying.
Specifically, wherein, classification comprises one of following or its combination in any: have common stream and the soil in abutting connection with plantation; There is common stream but not in abutting connection with the soil in plantation; Not only there is common stream and in abutting connection with plantation, but also there is common stream but not in abutting connection with the soil in plantation.
Because the second embodiment is mutually corresponding with present embodiment, therefore present embodiment can with the enforcement of working in coordination of the second embodiment.The correlation technique details of mentioning in the second embodiment is still effective in the present embodiment, and the technique effect that can reach in the second embodiment can be realized in the present embodiment too, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in present embodiment also can be applicable in the second embodiment.
The 6th embodiment of the present invention relates to a kind of soil selecting arrangement.The 6th embodiment is the further improvement of doing on the basis of the 4th embodiment, and as shown in Figure 6, main improvements are: utilize micro-subflow numeric field data to carry out fractal calculation to the computer capacity of topological analysis, greatly accelerated the time that soil is selected.
Specifically, in the topological analysis module of present embodiment, comprise following submodule:
Obtain submodule, for obtaining micro-subflow numeric field data.
Divide submodule, for dividing each watershed according to micro-subflow territory.
Analyze submodule, for utilize respectively land use data and ultra micro rainwash data in each watershed, each soil and each runoff are carried out to space topology analyzing.
Because the 3rd embodiment is mutually corresponding with present embodiment, therefore present embodiment can with the enforcement of working in coordination of the 3rd embodiment.The correlation technique details of mentioning in the 3rd embodiment is still effective in the present embodiment, and the technique effect that can reach in the 3rd embodiment can be realized in the present embodiment too, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in present embodiment also can be applicable in the 3rd embodiment.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above are to realize specific embodiments of the invention, and in actual applications, can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. a soil system of selection, is characterized in that, comprises following steps:
A. obtain land use data and ultra micro rainwash data;
B. utilize described land use data and described ultra micro rainwash data, each soil and each runoff are carried out to space topology analyzing;
C. derive all soils with common stream plantation according to the result of space topology analyzing.
2. soil according to claim 1 system of selection, it is characterized in that, described, each soil and each runoff are carried out in the step of space topology analyzing, the topological analysis result of a described runoff comprises: the topological analysis result of all upstream runoffs to this runoff.
3. soil according to claim 1 system of selection, is characterized in that, in described step C, all soils with common stream plantation are derived in classification;
Wherein, described classification comprises one of following or its combination in any:
There is common stream and the soil in abutting connection with plantation;
There is common stream but not in abutting connection with the soil in plantation;
Not only there is common stream and in abutting connection with plantation, but also there is common stream but not in abutting connection with the soil in plantation.
4. soil according to claim 1 system of selection, is characterized in that, in described step B, also comprises following sub-step:
Obtain micro-subflow numeric field data;
Divide each watershed according to described micro-subflow territory;
In each watershed, utilize respectively described land use data and described ultra micro rainwash data, each soil and each runoff are carried out to space topology analyzing.
5. soil according to claim 1 system of selection, is characterized in that, after described step C, also comprises following steps:
Record the relevant plantation area in each derivation soil.
6. a soil selecting arrangement, is characterized in that, comprises with lower module:
Acquisition module, for obtaining land use data and ultra micro rainwash data;
Topological analysis module, for utilizing described land use data and described ultra micro rainwash data, carries out space topology analyzing to each soil and each runoff;
Detection module, for detection of the described space topology analyzing result in a soil whether for thering is common stream plantation;
Derive module, for deriving all soils, the soil of described derivation is that detection is that its space topology analyzing result is the soil with common stream plantation in described detection module.
7. soil according to claim 6 selecting arrangement, is characterized in that, in described topological analysis module, the topological analysis result of a described runoff comprises: the topological analysis result of all upstream runoffs to this runoff.
8. soil according to claim 6 selecting arrangement, is characterized in that, described derivation module also comprises classification submodule;
Described classification submodule, derives all soils with common stream plantation for classifying;
Wherein, described classification comprises one of following or its combination in any:
There is common stream and the soil in abutting connection with plantation;
There is common stream but not in abutting connection with the soil in plantation;
Not only there is common stream and in abutting connection with plantation, but also there is common stream but not in abutting connection with the soil in plantation.
9. soil according to claim 6 selecting arrangement, is characterized in that, comprises following submodule in described topological analysis module:
Obtain submodule, for obtaining micro-subflow numeric field data;
Divide submodule, for dividing each watershed according to described micro-subflow territory;
Analyze submodule, for utilize respectively described land use data and described ultra micro rainwash data in each watershed, each soil and each runoff are carried out to space topology analyzing.
10. soil according to claim 6 selecting arrangement, is characterized in that, also comprises with lower module in described device:
Logging modle, for recording the relevant plantation area in each derivation soil.
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| CN106017558A (en) * | 2016-05-26 | 2016-10-12 | 田志华 | Crop plantation site screening system and method |
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| US20080109196A1 (en) * | 2006-11-06 | 2008-05-08 | The Remme Corporation | Tools and Methods for Range Management |
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Application publication date: 20141210 |