CN108693333A - A kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt - Google Patents
A kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt Download PDFInfo
- Publication number
- CN108693333A CN108693333A CN201810613466.7A CN201810613466A CN108693333A CN 108693333 A CN108693333 A CN 108693333A CN 201810613466 A CN201810613466 A CN 201810613466A CN 108693333 A CN108693333 A CN 108693333A
- Authority
- CN
- China
- Prior art keywords
- salt
- sodium sulphate
- swollen coefficient
- particle size
- coarse granule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to engineering geology technical field, the method for disclosing a kind of swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt includes the following steps:S01:Acquire particle size distribution data, water content, sodium sulfate quality content and the Geothermal data of coarse granule sodium sulphate salinized soil regional soil sample;S02:The grading target particle size of the regional soil sample is calculated according to particle size distribution data in step S01;S03:The swollen coefficient of salt of soil sample is calculated according to sodium sulphate content data in the grading target particle size of soil sample, step S01 in step S02 and water content data.The present invention by by different gradation target particle size, sodium sulphate content, the soil sample of mild moisture content carry out quadratic orthogonal regression, obtain the determination method of the swollen coefficient of coarse granule sodium sulphate salt marsh earth salt, and it obtains the swollen coefficient predictors of the salt of soil sample, achieved the purpose that provide the swollen coefficient discriminant approach of easy salt marsh earth salt for Railway Design and reduces cost.Therefore, it is suitble to promote the use of.
Description
Technical field
The invention belongs to engineering geology technical fields, and in particular to a kind of swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt
Method.
Background technology
Salinized soil is distributed the Canada of North America, 11 countries such as Argentina, Brazil, the Peru in U.S. South America;Africa Ah
You and Leah, 33 countries and regions such as Nigeria;29 countries such as China, India, Pakistan, the Iran in Asia and ground
Area;The Australia in Australia;10 countries such as the France in Europe.About 897.0 ten thousand square kilometres of world's salinized soil area, accounts for about generation
The 6.5% of the boundary land gross area.
In engineering, lyotropic salt is generally greater than or equal to 0.3% and less than 20% and with molten sunken or the swollen characteristic of salt soil
Be defined as salinized soil, it is considered that be rock under slacking, after flow dissolves lyotropic salt in the soil body, with water penetration to
It in lower water, is then risen under the capillarity of soil body hole near surface of stratum or surface layer, the lyotropic salt in water after evaporation
It is trapped in surface of stratum with water crystallization precipitation in soil and is formed.
At present to the research of the swollen mechanism of salt marsh earth salt, sodium sulphate content, water content, soil temperature and compactness only considered
Influence to Coarse Saline salt bulk, and compactness influence swollen on salt is not notable.Do not consider salinized soil self construction
Influence under the conditions of other correlative factor collective effects such as feature and sodium sulphate content, water content, temperature to the swollen characteristic of salt.Do not have yet
There are one the swollen coefficient methods of determination of salt under the conditions of the swollen coefficient method of determination of sodium sulphate salt marsh earth salt and its least favorable, are high-speed iron
Road design provides an easy-to-use method of discrimination, therefore this field is badly in need of proposing solution.
Invention content
Present invention aims at the methods for providing a kind of swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt, it is intended to solve real
Now to the prediction of the swollen coefficient of sodium sulphate salt marsh earth salt, an easy-to-use method of discrimination is provided for Design of High-speed Railway, is reduced
Design cost.
The technical solution adopted in the present invention is:
A kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt, specifically includes following steps:
S01:The particle size distribution data of acquisition coarse granule sodium sulphate salinized soil regional soil sample, water content, sodium sulphate matter
Measure content and Geothermal data;
S02:The grading target particle size of the regional soil sample is calculated according to particle size distribution data in step S01;
S03:According to sodium sulphate content data in the grading target particle size of soil sample, step S01 in step S02 and aqueous
Measure the swollen coefficient of salt that data calculate soil sample.
Coarse granule sodium sulphate salinized soil regional soil sample is acquired, determines that the distribution of salinized soil grading is bent by the method for screening
Line.Salt content in salinized soil uses gravimetric method or Means of Electrical Conductivity.Undisturbed soil is acquired, it is best to measure it according to compaction test
Moisture content.Pass through outdoor measurement or the local weather information ability temperature of inquiry.
Further, grading target particle size is equal to the ratio of A and B, and A is the coarse granule of grain size d > 5mm in soil sample
Sodium sulfate quality percentage composition, B is the coarse granule sodium sulfate quality percentage composition of grain size d < 5mm in soil sample, described
Grading target particle size is that grading is thick in coarse granule sodium sulphate, fines ratio in step S02.
Further, the grading target particle size includes five preferred values, preferred value is respectively 0.25,0.429,1,
2.33 with 4.
Further, the step S03 calculates the swollen coefficient of salt according to following manner:
Wherein:x1For the mass content (%) of sodium sulphate, x2It is the swollen coefficient of salt for moisture content (%), Y.
If ground temperature numerical value is at -10~-5 DEG C, -5~0 DEG C, 0~5 DEG C, the corresponding swollen coefficient of salt is according to the ground temperature numerical value institute
Temperature range, determined using interpolation method.
Further, include least favorable temperature condition in Geothermal data, water content data include least favorable moisture content item
Part determines the swollen coefficient of salt in the following manner under the conditions of least favorable temperature condition and least favorable moisture content:
Wherein:X is the mass content (%) of sodium sulphate, and Y is the swollen coefficient of salt.
When grading target particle size is preferred value, directly brings the mass content of sodium sulphate into calculating formula and seek the swollen system of salt
Number.
Further, in order to determine the corresponding swollen coefficient of salt of wider grading target particle size, if grading target particle size category
In 0.25~0.429,0.429~1,1~2.33,2.33~4, then the swollen coefficient of corresponding salt is according to where the grading target particle size
Indication range is obtained using interpolation method determination.Ordinary circumstance is determined by the way of linear interpolation.
Beneficial effects of the present invention are:
The present invention by by different gradation target particle size, sodium sulphate content, mild moisture content soil sample carry out it is secondary just
Orthogonal Rotational Regressive Tests are handed over, obtain the determination method of the swollen coefficient of coarse granule sodium sulphate salt marsh earth salt, and obtain the swollen coefficient prediction of the salt of soil sample
Value, has achieved the purpose that provide the swollen coefficient discriminant approach of easy salt marsh earth salt for Railway Design and has reduced cost.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings only shows the section Example of the present invention, therefore is not to be taken as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the swollen coefficient calculation method of sodium sulphate salinized soil region sodium sulphate salt marsh earth salt described in the embodiment of the present invention
Flow chart.
Fig. 2 is Coarse Saline quadratic orthogonal regression design factor water-glass of the present invention.
Fig. 3 is salt swollen coefficient of the Coarse Saline of the present invention under the conditions of least favorable temperature and optimum moisture content
Figure.
Fig. 4 is the ratio of Iranian Teheran to Isaphahen area Coarse Saline salt swollen coefficient calculated value and measured value
Compared with.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment does further explaination to the present invention.
Embodiment:
As shown in Figure 1 to 4, present embodiment discloses a kind of sides of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt
Method specifically includes following steps:
S01:The particle size distribution data of acquisition coarse granule sodium sulphate salinized soil regional soil sample, water content, sodium sulphate matter
Measure content and Geothermal data;
S02:The grading target particle size of the regional soil sample is calculated according to particle size distribution data in step S01;
S03:According to sodium sulphate content data in the grading target particle size of soil sample, step S01 in step S02 and aqueous
Measure the swollen coefficient of salt that data calculate soil sample.
Grading target particle size is equal to the ratio of A and B, and A is the coarse granule sodium sulfate quality of grain size d > 5mm in soil sample
Percentage composition, B is the coarse granule sodium sulfate quality percentage composition of grain size d < 5mm in soil sample, in the step S02
Grading target particle size is that grading is thick in coarse granule sodium sulphate, fines ratio.
Determine that the swollen coefficient of salt mainly considers four factors, gradation types, sodium sulphate content, moisture content and ground in this method
Temperature, moisture content determine that ground temperature is determined by detecting by water content.Gradation types are indicated using grading target particle size, due to not
All gradation types can be indicated with continuous number, so give five kinds of gradation types, corresponding five grading target particle sizes it is excellent
Choosing value, point five kinds of operating modes determine calculating formula.
The grading target particle size includes five preferred values, and preferred value is respectively 0.25,0.429,1,2.33 and 4.
In order to preferably ensure the accuracy of discrimination formula, under each gradation types, on the basis of temperature, it is divided into 4 kinds
Temperature conditions only considers sodium sulphate content and water-cut variation effect, there is 4 kinds of different temperatures feelings that is, under each gradation types
The swollen property identification mode of salt under condition.
In order to select testing site appropriate in the trial stretch of factor, it is good to establish a statistical property with less experiment
Equation, so providing simple discrimination standard using quadratic orthogonal regression, and then for Practical Project.
The swollen coefficient of salt is calculated according to following manner in the step S03:
Wherein:x1For the mass content (%) of sodium sulphate, x2It is the swollen coefficient of salt for moisture content (%), Y.
If ground temperature numerical value is at -10~-5 DEG C, -5~0 DEG C, 0~5 DEG C, the corresponding swollen coefficient of salt is according to the ground temperature numerical value institute
Temperature range, determined using interpolation method.
Include least favorable temperature condition in Geothermal data, water content data include least favorable moisture content condition, least
Under the conditions of sharp temperature condition and least favorable moisture content, the swollen coefficient of salt is determined in the following manner:
Wherein:X is the mass content (%) of sodium sulphate, and Y is the swollen coefficient of salt.
When grading target particle size is preferred value, directly brings the mass content of sodium sulphate into calculating formula and seek the swollen system of salt
Number.In order to determine the corresponding swollen coefficient of salt of wider grading target particle size, do not have for the soil sample calculated corresponding known
When grading target particle size, the grading target particle size of soil sample is calculated to the swollen coefficient of salt of requirement by the method for interpolation.If grading
Target particle size belongs to 0.25~0.429,0.429~1,1~2.33,2.33~4, then the swollen coefficient of corresponding salt is according to the grading
Indication range where target particle size, which is determined, to be obtained, ordinary circumstance is determined by the way of linear interpolation.
Illustrative example illustrates the concrete application of this method herein:
Table 1 gives the soil sample number of coarse granule particle diameter distribution, -2 DEG C of temperature, sodium sulphate content 3%, moisture content 14%
According to now calculating the swollen coefficient of salt under this condition.Since grading target particle size and temperature section illustrate, so interpolation is needed to solve
Other values, and sodium sulphate content and moisture content are brought directly to calculating of the present invention.
1 coarse granule particle size distribution table of table
The first step calculates grading target particle size according to data in table 1:
A is the coarse granule sodium sulfate quality percentage composition of coarse granule grain size d > 5mm;
B is the coarse granule sodium sulfate quality percentage composition of grain size d < 5mm in soil sample.
Second step finds corresponding gradation types according to grading target particle size:Grading target particle size is 0.54, due to 0.54
Between 1 and 0.429, so selecting gradation types 3 (grading target particle size is 1) and gradation types 4, (grading target particle size is
0.429) boundary gradation types are used as, the swollen coefficient of salt are solved, as the swollen coefficient of dividing value salt.
Third walks, the salt that fixes limit is swollen coefficient:Since temperature is -2 DEG C, between 0 DEG C and -5 DEG C.So determining grading class
The mode that the swollen coefficient of salt of type 3 (grading target particle size is 1) under this condition selects for:
Y=-0.0000853+0.00496348x1+0.00007393x2+0.00000387x1x2
-0.0002461x1 2-0.0000023x2 2
Y=0.00012552+0.0070455x1+0.00009527x2+0.00000129x1x2
-0.0005261x1 2-0.0000029x2 2
0 DEG C when Y=0.132%, Y=0.16%, Y=0.1432% when interpolation obtains -2 DEG C at -5 DEG C.
Determine the mode that the swollen coefficient of salt of gradation types 4 (grading target particle size is 0.429) under this condition selects for:
Y=0.00028079+0.00582981x1+0.00010979x2-0.0000026x1x2
-0.000044x1 2-0.0000022x2 2
Y=0.00068862+0.0081181x1+0.00009058x2+0.00000129x1x2
-0.0003585x1 2-0.0000017x2 2
0 DEG C when Y=0.196%, Y=0.248%, Y=0.217% when interpolation obtains -2 DEG C at -5 DEG C
According to grading target particle size calculated above be 1 when Y=0.1432%, grading target particle size be 0.429 when Y
=0.217%.And the salinized soil grading target particle size provided in data is 0.54.Then set y=ax+b 3 points of salt determined thus
The equation of swollen coefficient y and grading target particle size x, then:
The b=0.272 brought into
That is y=-0.129x+0.272
Then x=0.54, which is brought into, acquires y=0.203%.
According to interpolation method obtain coarse granule, -2 DEG C of temperature, sodium sulphate content 3%, moisture content 14% the swollen coefficient of salt be Y=
0.203%.
Fine grained is unified grading, so only needing the interpolation of consideration temperature, the same coarse granule of method.
In order to verify engineering practicability and the accuracy of the present invention, all Iranian Teheran are chosen to Isaphahen high-speed iron
The indoor salt of road project field sampling coarse granule and fine grained salinized soil is swollen, and coefficient test value compares and analyzes, and verifies this research
The engineering practicability of obtained method.DK77+300, DK78+900 experiment point salinized soil are sampled as Coarse Saline, through particle
Sieve test obtains its grain diameter index respectively, and DZ-96-03, DZ-90-00A are fine grained salinized soil, remaining index can be by
Early period, basic soil test obtained, the experiment ginseng of DK77+300, DK78+900, DZ-96-03, DZ-90-00A point salinized soil
Number is as shown in table 2.
2 each point salinized soil test parameters of table
Salt described in upper table is swollen coefficient is larger based on autumn and winter alternate periods day and night temperature along moral her high ferro moral libraries section
It is measured under operating mode, chooses local -7 DEG C of Annual lowest climate temperature in November and calculated.The grain size of the two points Coarse Saline refers to
It is marked between 0.25-0.429, temperature range chooses target particle size 0.25 at -5 DEG C to -10 respectively at -5 DEG C to -10 DEG C
DEG C corresponding calculating formula, target particle size 0.429 are calculated, carefully in -5 DEG C to -10 DEG C corresponding calculating formulas by the method for example
Particle salinized soil is not because considering target particle size, so only needing to consider that temperature obtains interpolation, the same coarse granule of method.
The 3 swollen coefficient vs table of each point Coarse Saline salt of table
As it can be seen that using the swollen system errors of salt of this method determination within 5%, and calculated value is bigger than normal compared with measured value, safety
Coefficient ensure that the safety of factory construction to a certain extent within the scope of 1.04-1.05.As a result prove what this method obtained
The engineering usability of the swollen coefficient of salt of salinized soil is preferable.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific implementation mode should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (7)
1. a kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt, which is characterized in that include the following steps:
S01:Particle size distribution data, water content, the sodium sulfate quality of acquisition coarse granule sodium sulphate salinized soil regional soil sample contain
Amount and Geothermal data;
S02:The grading target particle size of the regional soil sample is calculated according to particle size distribution data in step S01;
S03:According to sodium sulphate content data and water content number in the grading target particle size of soil sample, step S01 in step S02
According to the swollen coefficient of salt for calculating soil sample.
2. a kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt according to claim 1, it is characterised in that:
Grading target particle size in the step S02 is equal to the ratio of A and B, and A is the coarse granule sulfuric acid of grain size d > 5mm in soil sample
Sodium mass content percentage, B are the coarse granule sodium sulfate quality percentage composition of grain size d < 5mm in soil sample.
3. a kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt according to claim 2, it is characterised in that:
The grading target particle size includes five preferred values, and preferred value is respectively 0.25,0.429,1,2.33 and 4.
4. a kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt according to claim 3, it is characterised in that:
The step S03 calculates the swollen coefficient of salt according to following manner:
Wherein:x1For the mass content (%) of sodium sulphate, x2It is the swollen coefficient of salt for moisture content (%), Y.
5. a kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt according to claim 4, it is characterised in that:
If ground temperature numerical value is at -10~-5 DEG C, -5~0 DEG C, 0~5 DEG C, the corresponding swollen coefficient of salt is according to the temperature where the ground temperature numerical value
Range is determined using interpolation method.
6. a kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt according to claim 3, it is characterised in that:
Include least favorable temperature condition in Geothermal data, water content data include least favorable moisture content condition, in least favorable temperature strip
Under the conditions of part and least favorable moisture content, the swollen coefficient of salt is determined in the following manner:
Wherein:X is the mass content (%) of sodium sulphate, and Y is the swollen coefficient of salt.
7. a kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt according to claim 4 or 6, feature exist
In:If grading target particle size belongs to 0.25~0.429,0.429~1,1~2.33,2.33~4, the corresponding swollen coefficient root of salt
According to indication range where the grading target particle size, determined using interpolation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613466.7A CN108693333B (en) | 2018-06-14 | 2018-06-14 | Method for determining salt expansion coefficient of coarse particle sodium sulfate saline soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613466.7A CN108693333B (en) | 2018-06-14 | 2018-06-14 | Method for determining salt expansion coefficient of coarse particle sodium sulfate saline soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108693333A true CN108693333A (en) | 2018-10-23 |
| CN108693333B CN108693333B (en) | 2021-05-28 |
Family
ID=63848335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810613466.7A Active CN108693333B (en) | 2018-06-14 | 2018-06-14 | Method for determining salt expansion coefficient of coarse particle sodium sulfate saline soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108693333B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884271A (en) * | 2019-02-28 | 2019-06-14 | 中铁二院工程集团有限责任公司 | Consider the simple surveying method of the swollen coefficient of coarse grain salt marsh earth salt of gradation and salt content |
| CN113075106A (en) * | 2021-03-26 | 2021-07-06 | 桂林理工大学 | Method for determining hydraulic parameters and water inflow amount of gravel soil in erosion stage |
| CN114076738A (en) * | 2021-11-22 | 2022-02-22 | 浙江大学 | Method for estimating soil salinity of residual straw farmland by using remote sensing construction index |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851894A (en) * | 2010-07-01 | 2010-10-06 | 中国科学院地质与地球物理研究所 | Protection method for improving salt expansion or dissolution sink of salty soil |
| JP2014085177A (en) * | 2012-10-22 | 2014-05-12 | Shimizu Corp | Method for performing measurement test of water-absorptive expansion characteristics |
| CN106932558A (en) * | 2017-04-19 | 2017-07-07 | 长安大学 | A kind of sealed refrigeration heater for testing salt marsh earth salt bulk |
| CN107064466A (en) * | 2017-05-08 | 2017-08-18 | 兰州交通大学 | A kind of indoor sound carries the swollen coefficient determination experimental provision of salt marsh earth salt and method |
-
2018
- 2018-06-14 CN CN201810613466.7A patent/CN108693333B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851894A (en) * | 2010-07-01 | 2010-10-06 | 中国科学院地质与地球物理研究所 | Protection method for improving salt expansion or dissolution sink of salty soil |
| JP2014085177A (en) * | 2012-10-22 | 2014-05-12 | Shimizu Corp | Method for performing measurement test of water-absorptive expansion characteristics |
| CN106932558A (en) * | 2017-04-19 | 2017-07-07 | 长安大学 | A kind of sealed refrigeration heater for testing salt marsh earth salt bulk |
| CN107064466A (en) * | 2017-05-08 | 2017-08-18 | 兰州交通大学 | A kind of indoor sound carries the swollen coefficient determination experimental provision of salt marsh earth salt and method |
Non-Patent Citations (2)
| Title |
|---|
| 张军艳 等: "硫酸盐渍土盐胀率影响因素交互作用分析", 《山西建筑》 * |
| 张莎莎 等: "影响粗粒硫酸盐渍土盐胀特性的敏感因素研究", 《岩土工程学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884271A (en) * | 2019-02-28 | 2019-06-14 | 中铁二院工程集团有限责任公司 | Consider the simple surveying method of the swollen coefficient of coarse grain salt marsh earth salt of gradation and salt content |
| CN113075106A (en) * | 2021-03-26 | 2021-07-06 | 桂林理工大学 | Method for determining hydraulic parameters and water inflow amount of gravel soil in erosion stage |
| CN114076738A (en) * | 2021-11-22 | 2022-02-22 | 浙江大学 | Method for estimating soil salinity of residual straw farmland by using remote sensing construction index |
| CN114076738B (en) * | 2021-11-22 | 2023-04-18 | 浙江大学 | Method for estimating soil salinity of residual straw farmland by using remote sensing construction index |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108693333B (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Annabi et al. | Spatial variability of soil aggregate stability at the scale of an agricultural region in Tunisia | |
| Kienzle | A new temperature based method to separate rain and snow | |
| Würzer et al. | Modelling liquid water transport in snow under rain-on-snow conditions–considering preferential flow | |
| Smith et al. | Recent trends from Canadian permafrost thermal monitoring network sites | |
| CN108693333A (en) | A kind of method of the swollen coefficient of determining coarse granule sodium sulphate salt marsh earth salt | |
| Li et al. | Spatial–temporal evolution of soil erosion in a typical mountainous karst basin in SW China, based on GIS and RUSLE | |
| Apaydin et al. | Evaluation of topographical and geographical effects on some climatic parameters in the Central Anatolia Region of Turkey | |
| Yang et al. | Wind-induced precipitation undercatch of the Hellmann gauges | |
| CN105891833A (en) | Method of identifying warm cloud precipitation rate based on Doppler radar information | |
| CN109829584A (en) | A kind of mountain torrents risk dynamic assessment method | |
| CN104727207A (en) | Structural maintenance and design method of semi-rigid base-layer asphalt pavement | |
| LI et al. | Spatio-temporal changes of soil salinity in arid areas of south Xinjiang using electromagnetic induction | |
| Grandry et al. | A method for low-flow estimation at ungauged sites: a case study in Wallonia (Belgium) | |
| Wu et al. | Effects of single‐and multi‐site calibration strategies on hydrological model performance and parameter sensitivity of large‐scale semi‐arid and semi‐humid watersheds | |
| Feiccabrino et al. | Surface-based precipitation phase determination methods in hydrological models | |
| CN105488805A (en) | Method for decomposing passive microwave mixed pixel of forest land accumulated snow based on multi-frequency and dual-polarization | |
| Duan et al. | Critical loads of acid deposition on soil in China | |
| CN106284379A (en) | The method judging slope stability in conjunction with the envelope diagram in side slope deep implication face | |
| Chapman et al. | Hydrological modelling and decision-support tool development for water allocation, northeastern British Columbia | |
| Li et al. | Geotechnical hazards assessment on wind-eroded desert embankment in Inner Mongolia Autonomous Region, North China | |
| Ng et al. | Development of groundwater level fluctuation response system subjected to rainfall for slope stability forecasting | |
| Zhao et al. | Evaluation of the ERS scatterometer-derived soil water index to monitor water availability and precipitation distribution at three different scales in China | |
| Huo et al. | Runoff monitoring in the Lhasa River Basin using passive microwave data | |
| Esmaeili et al. | Evaluation of some morphological, phytochemical and ecological characteristics of different populations of Satureja rechingeri Jamzad | |
| Sun | The impact of climate as expressed by Thornthwaite moisture index on residential footing design on expansive soil in Australia |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |