CN106680454A  Method for calculating soil erosion modulus of governed collapse mound with sandblocking dam  Google Patents
Method for calculating soil erosion modulus of governed collapse mound with sandblocking dam Download PDFInfo
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 CN106680454A CN106680454A CN201510756635.9A CN201510756635A CN106680454A CN 106680454 A CN106680454 A CN 106680454A CN 201510756635 A CN201510756635 A CN 201510756635A CN 106680454 A CN106680454 A CN 106680454A
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 238000004162 soil erosion Methods 0.000 title claims abstract description 26
 239000002689 soil Substances 0.000 claims abstract description 26
 230000003628 erosive Effects 0.000 claims abstract description 16
 238000005553 drilling Methods 0.000 claims abstract description 6
 238000000034 method Methods 0.000 claims abstract 2
 238000004364 calculation method Methods 0.000 claims description 5
 238000011065 insitu storage Methods 0.000 abstract description 2
 230000000903 blocking Effects 0.000 abstract 1
 230000000694 effects Effects 0.000 description 2
 238000005260 corrosion Methods 0.000 description 1
 238000000151 deposition Methods 0.000 description 1
 238000005516 engineering process Methods 0.000 description 1
 239000010438 granite Substances 0.000 description 1
 230000005484 gravity Effects 0.000 description 1
 238000005259 measurement Methods 0.000 description 1
 230000001737 promoting Effects 0.000 description 1
 238000005070 sampling Methods 0.000 description 1
 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention relates to a method for calculating a soil erosion modulus of a governed collapse mound with sandblocking dam. The method comprises the following specific processes: dividing a siltation area into a plurality of approximate trapezoids or triangles according to the intercepted cross section of a boundary turning point of the sandblocking dam siltation area; determining the quantity and the positions of drilling points according to the width of the cross section and measuring the silt siltation depth of the siltation area; calculating the area of each cross section of the sandblocking dam siltation area through the silt siltation depth; calculating the siltation volume of silt in front of the sandblocking dam by utilizing the area of each cross section and the distance between the adjacent cross sections; calculating the soil erosion modulus according to the area of a collapse mound erosion area, the average soil volume weight of the silted silt and the silt siltation volume. The method provided by the invention has the benefits that the sandblocking dam of the governed collapse mound and the sandblocking dam's function of blocking most of eroded soil are fully utilized, and the soil erosion modulus after the collapse mound is governed is calculated by calculating the silt siltation quantity, so that the soil conservation benefits caused by various government measures for the collapse mount is subjected to insitu verification.
Description
Technical field
The present invention relates to field is evaluated in water and soil conservation, specifically belong to a kind of tool check dam and administered slope collapse soil erosion modulus measuring method.
Background technology
Collapsed gully erosion is as a kind of serious soil loss pattern, very universal in the deep granite Hills And Low Mountains distribution of south China weathering crust.Through slope collapse improvement for many years and experimental study, sum up the technical method that various slope collapses are administered, but at present slope collapse is administered has every present situation such as engineering is established one's own system, Integration ofTechnology benefit is not highlighted, and lacks the method that Soil erosion situation carries out benefit checking after administering to slope collapse.After research slope collapse different measure is administered, Soil erosion situation is advantageously implemented slope collapse governance model optimum organization, the improvement for promoting slope collapse more efficient.
At present, the conventional Soil erosion measuring method of China mainly has runoff observation on plots method, plugs in pricker method, remote sensing image, 3 D laser scanning etc..Runoff plots method is easy to operate, but its civil engineering facility high cost, needs longterm observation, and which can only explain the size of hydraulic action in collapsed gully erosion, and shortage is considered to gravity part；Plug in pricker method is easy, practicality is high, but erosion pattern of the slope collapse based on avalanche effect can cause loss of data；Remote sensing image method is suitable for the analysis of the erosion condition in large scale, and which receives remote sensing resolution, weather conditions, vegetation coverage etc. to affect larger；Threedimensional laser scanner high precision, data are complete, but the shortage to administering the slope collapse in one period, due to administering front basic data, it is impossible to the efficiency of soil conservation after assessment improvement, and its expense input is larger.
The content of the invention
In order to solve the above problems, the purpose of the present invention is：A kind of tool check dam has administered slope collapse soil erosion modulus measuring method.
The technical solution adopted in the present invention is：A kind of tool check dam has administered slope collapse soil erosion modulus measuring method, comprises the following steps：
Step 1：Transverse section is intercepted according to check dam alluvial area border turning point alluvial zoning is divided into into some approximate trapezoids or triangle；
Step 2：Determine drill site number, position and measure its silt depth according to transverse section width；
Step 3：By each cross sectional area in silt depth calculation check dam alluvial area；
Step 4：Using each cross sectional area S_{i}And between adjacent transverse section apart from L_{i}Calculate Sediment Siltation volume V before check dam；
Step 5：Soil erosion modulus M is calculated according to the area of collapsing erosion area S, the average soil weight σ of silt, alluvial time t and Sediment Siltation volume V.
Further, in the step 1, check dam alluvial area transverse section intercept method is：Choose and intersect and parallel to the transverse section of check dam with the important turning point in check dam alluvial area border so as to silt horizontal plane is divided into into some approximate trapezoids or triangle with the intersection of silt horizontal plane.
Further, drill site number, position are determined on transverse section in the step 2 and the method for silt depth is measured and is：3 to 5 drill sites are chosen uniformly in transverse section upper edge, the concrete number of point is depending on the width of transverse section；Depth is measured using soil drilling apparatus on the point chosen, by discerning whether to determine deposit depth for the soil that deposits to drilling apparatus submerged depth and the soil sample brought up.
Further, in the step 3, Cross Area Computation Method is：The depth data of the width and each point of gained transverse section is imported in AutoCAD and is simulated interpolation, each adjacent end points smooth curve is connected to form plane and calculate each area of plane S_{i}。
Further, in the step 4, the computing formula of Sediment Siltation amount is：
Further, the area of collapsing erosion area S, check dam alluvial area area S in the step 5_{y}Determined using differential GPS；The average soil weight of silt is that about 1 ~ 2 meter of position takes soil profile and determines each edaphic soil weight on section before check dam, asks for its meansigma methods σ；The alluvial time is from check dam the built time to checking minute span.
Further, the soil modulus calculation formula is：
The invention has the beneficial effects as follows：The present invention has check dam this feature according to slope collapse is administered, the average annual soil erosion modulus in corrosion area after slope collapse improvement is estimated by determining check dam silt amount, realize the value of soil erosion modulus is calculated under conditions of longterm observation and model prediction is not needed, administering efficiency of soil conservation to collapsed gully erosion carries out checking in situ.
Description of the drawings
Key step flow charts of the Fig. 1 for the inventive method
Fig. 2 is the area of collapsing erosion, alluvial area and crosssectional location profile in the present invention
Fig. 3 is Sediment Siltation quantity algorithm threedimensional simulation figure before check dam in the present invention
Fig. 4 intercepts example for area transverse section of depositing before check dam in the present invention
Have in figure：Check dam 1, slope collapse alluvial area 2, transverse section 3, the area of collapsing erosion 4, drill site 5, trapezoidal or triangle 6.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
Referring to figs. 1 to Fig. 4, a kind of tool check dam has administered slope collapse soil erosion modulus measuring method, comprises the following steps：
Step 1：Transverse section is intercepted according to check dam alluvial area border turning point alluvial zoning is divided into into some approximate trapezoids or triangle；
Step 2：Determine drill site number, position and measure its silt depth according to transverse section width；
Step 3：By each cross sectional area in silt depth calculation check dam alluvial area；
Step 4：Using each cross sectional area S_{i}And between adjacent transverse section apart from L_{i}Calculate Sediment Siltation volume V before check dam；
Step 5：Soil erosion modulus M is calculated according to the area of collapsing erosion area S, the average soil weight σ of silt, alluvial time t and Sediment Siltation volume V.
In the present invention, in abovementioned steps 1, check dam alluvial area intercepts transverse section, as shown in figure 4, choose intersecting and parallel to the transverse section of check dam with the important turning point in check dam alluvial area border so as to silt horizontal plane is divided into some approximate trapezoids or triangle with the intersection of silt horizontal plane.
Reconnaissance and its depth survey on transverse section in abovementioned steps 2, as shown in figure 3, choosing 3 to 5 drill sites on intersection of the transverse section selected with silt horizontal plane, the number of point is depending on the width of transverse section；Depth is measured using soil drilling apparatus on the point chosen, by discerning whether to determine deposit depth for the soil that deposits to drilling apparatus submerged depth and the soil sample brought up.
In abovementioned steps 3, Cross Area Computation Method is：The depth of transverse section intersection length and each drill site is imported in AutoCAD softwares and is simulated interpolation, each adjacent end points smooth curve is connected to form plane and calculate each area of plane S_{i}。
Distance in abovementioned steps 4 between adjacent transverse section can be by live direct measurement, also the alluvial area boundary point obtained by differential GPS measure and transverse section selected point can be imported in AutoCAD softwares and consecutive points is connected into into line, the figure with crosssectional location and alluvial area's plane is formed, the distance of two transverse section is determined in AutoCAD softwares.
In abovementioned steps 4, the computing formula of Sediment Siltation amount is：
In formula, V is Sediment Siltation volume before check dam, S_{i}、S_{i+1}Respectively ith, the area of i+1 transverse section, Li are the distance between ith, i+1, two transverse section.
In abovementioned steps 5, the area of collapsing erosion area is obtained, as shown in Figure 3, continuous sampling site is carried out along collapsed gully erosion area edge by differential GPS and obtains boundary position data, then imported data in AutoCAD softwares, closed sides boundary line is formed by each singlepoint is connected into line and its area is calculated.
In abovementioned steps 5, the average soil weight acquisition methods of silt are：Take silt section in check dam alluvial area, silt section is layered and from bottom to up each layer is beaten and take cutting ring, the soil weight of per layer of measure simultaneously asks for the meansigma methodss of the entire profile soil weight.
In abovementioned steps 5, alluvial Time Calculation method is：The time span of confirmatory experiment measure is built up from check dam.
In abovementioned steps 5, soil erosion modulus computing formula is：
In formula, M is soil erosion modulus, and V is Sediment Siltation volume before check dam, and σ is the average soil weight of silt, and S is the area of collapsing erosion area, and t is the Sediment Siltation time.
Claims (5)
1. a kind of tool check dam has administered slope collapse soil erosion modulus measuring method, it is characterised in that：Its detailed process is：
Step 1：Transverse section is intercepted according to check dam alluvial area border turning point alluvial zoning is divided into into some approximate trapezoids or triangle；
Step 2：Determine drill site number, position and measure its silt depth according to transverse section width；
Step 3：By each cross sectional area in silt depth calculation check dam alluvial area；
Step 4：Using each cross sectional area S_{i}And between adjacent transverse section apart from L_{i}Calculate Sediment Siltation volume V before check dam；
Step 5：Soil erosion modulus M is calculated according to the area of collapsing erosion area S, the average soil weight σ of silt, alluvial time t and Sediment Siltation volume V.
2. a kind of tool check dam according to claim 1 has administered slope collapse soil erosion modulus measuring method, it is characterised in that in abovementioned steps 1, check dam alluvial area's intercepting sectioning method is：Choose and intersect and parallel to the transverse section of check dam with the important turning point in check dam alluvial area border so as to silt horizontal plane is divided into into some approximate trapezoids or triangle with the intersection of silt horizontal plane.
3. a kind of tool check dam according to claim 1 has administered slope collapse soil erosion modulus measuring method, it is characterised in that in abovementioned steps 3, Cross Area Computation Method is：3 to 5 points are chosen on transverse section uniformly as depth drill site, the depth of each point is measured using soil drilling apparatus, the data obtained is imported in AutoCAD and is simulated interpolation, each adjacent end points smooth curve is connected to form plane and calculate each area of plane S_{i}。
4. a kind of tool check dam according to claim 1 has administered slope collapse soil erosion modulus measuring method, it is characterised in that in abovementioned steps 4, the computing formula of Sediment Siltation amount is：
In formula, V is Sediment Siltation volume before check dam, S_{i}、S_{i+1}Respectively ith, the area of i+1 transverse section, Li are the distance between ith, i+1, two transverse section.
5. a kind of tool check dam according to claim 1 has administered slope collapse soil erosion modulus measuring method, it is characterised in that in abovementioned steps 5, soil erosion modulus computing formula is：
In formula, M is soil erosion modulus, and V is Sediment Siltation volume before check dam, and σ is the average soil weight of silt, and S is the area of collapsing erosion area, and t is the Sediment Siltation time.
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Cited By (3)
Publication number  Priority date  Publication date  Assignee  Title 

CN108414430A (en) *  20180312  20180817  唐山国丰钢铁有限公司  The measuring method of the relatively corrosive area of salt spray test 
CN109425561A (en) *  20170830  20190305  中国科学院城市环境研究所  A kind of slope collapse stability diagnostic techniques of improvement based on the soil profile particle composition that deposits before debris dam 
CN109738611A (en) *  20181225  20190510  四川大学  A kind of apparatus and method applied to the measuring and calculating of small watershed erosion modulus 
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Cited By (4)
Publication number  Priority date  Publication date  Assignee  Title 

CN109425561A (en) *  20170830  20190305  中国科学院城市环境研究所  A kind of slope collapse stability diagnostic techniques of improvement based on the soil profile particle composition that deposits before debris dam 
CN109425561B (en) *  20170830  20210413  中国科学院城市环境研究所  Governing collapse stability diagnosis technology based on sediment soil profile particle composition in front of sandblocking dam 
CN108414430A (en) *  20180312  20180817  唐山国丰钢铁有限公司  The measuring method of the relatively corrosive area of salt spray test 
CN109738611A (en) *  20181225  20190510  四川大学  A kind of apparatus and method applied to the measuring and calculating of small watershed erosion modulus 
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Application publication date: 20170517 