Humid region sediment yield estimation method based on amended rainstorm river network fractal

A technology for wet areas and sediment production, applied in calculation, special data processing applications, instruments, etc., can solve the problem of unpredictability of sediment production estimation, achieve the effect of less parameter variables, simple method and accurate estimation results

Inactive Publication Date: 2017-03-15
BINZHOU UNIV
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Problems solved by technology

[0005] The calculation of the sediment yield in the humid area of ​​the fractal river network is generally estimated based on statistical data. However, the estimation of the sediment yield in the humid area of ​​the river network fractal in the rainstorm area is often difficult to predict.

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  • Humid region sediment yield estimation method based on amended rainstorm river network fractal

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Embodiment 1

[0027]

[0028] 1) The river network fractal value (X1) is obtained through the box counting method of the river network fractal;

[0029] The annual rainstorm (X2) is calculated by querying the local weather station data and summing the local annual rainstorm (daily rainfall > 50mm) data;

[0030] The annual sand yield Y (tons / ha) of SWAT is calculated based on the SWAT model;

[0031] (2) Perform regression analysis on the three columns of data Y, X1, and X2 to obtain the following multiple regression equation:

[0032] Y=553.734X1+0.024X2-590.952

[0033] Substitute the values ​​of X1 and X2 into the above equation to obtain the estimated annual sediment yield Y', and the correlation coefficient between the data in the Y' column and the Y column (R 2 ) is 0.7274. The linear regression equation is: Y'=0.7251Y+2.0807.

[0034] (3) Obtain the X1 of other areas through the box counting method of river network fractal, and obtain the X2 of other areas by querying the weat...

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Abstract

The invention belongs to the field of area soil erosion and particular relates to a humid region sediment yield estimation method based on amended rainstorm river network fractal. The estimation method comprises the steps that annual sediment yield Y is calculated according to a river network fractal value X1 obtained by adopting a river network fractal calculation method and annular storm rainfall X2 based on an SWAT model, linear fitting is performed to obtain a liner fitting equation, the X1 and the X2 are substituted to the liner fitting equation to obtain Y', linear fitting is conducted on the Y' and Y to obtain correlation coefficients of the Y' and Y; X1 in other areas is obtained by adopting the river network fractal calculation method, meteorological station data is queried to obtain X2 in other areas, the X1 and X2 are substituted to the equation, and the annual sediment yield in a certain humid region can be estimated. The method is simpler and more convenient compared with the SWAT and other methods, used parametric variables are few, estimation results are accurate, the method is suitable for rainstorm often occurred areas high in sediment yield, and the practical significance of the method is increased.

Description

[0001] (1) Technical field [0002] The invention belongs to the field of regional soil erosion, and in particular relates to a method for estimating the amount of sediment in a humid area based on the correction of river network fractals by heavy rain. [0003] (2) Background technology [0004] In the prior art, the regional scale application and improvement of model systems for soil and water conservation planning and design, soil and water conservation measure benefit assessment, and tributary-scale soil and water loss investigation and monitoring are of great significance to soil determination. [0005] The calculation of sediment yield in the humid area with fractal river network is generally estimated based on statistical data. However, it is often difficult to estimate the sediment yield in the humid area with fractal river network in the rainstorm area through the estimation results of statistical data. Since the conventional method is ineffective for estimating the se...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 荣琨郑焕强邹美玲罗杰李学平张晨曦
Owner BINZHOU UNIV
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