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Comprehensive quantification method for morphological characteristics of slope rill development based on multiple dimensions

A technology of morphological features and quantitative methods, which is applied in design optimization/simulation, special data processing applications, complex mathematical operations, etc., to achieve the effect of improving scientificity and accuracy and reducing the total number of indicators

Active Publication Date: 2018-02-23
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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Problems solved by technology

This method overcomes the inadequacy of existing single-factor quantitative parameters in expressing the complexity of rill development, quantifies the development of rills on slopes from a multi-dimensional perspective, and improves the scientificity and accuracy of rill morphology quantification

Method used

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  • Comprehensive quantification method for morphological characteristics of slope rill development based on multiple dimensions
  • Comprehensive quantification method for morphological characteristics of slope rill development based on multiple dimensions
  • Comprehensive quantification method for morphological characteristics of slope rill development based on multiple dimensions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This example studies the evolution process of the rill form on the loess slope.

[0052] A comprehensive quantification method based on multi-dimensional morphological characteristics of slope rill development, the method includes the following steps:

[0053] (1) Obtain multi-dimensional characteristic parameters of rill shape and sediment production process data;

[0054] Three artificial simulated rainfall tests with rainfall intensities of 66mm / h, 94mm / h, and 127mm / h were carried out on a 20° steep slope test soil tank with a size of 5m×1m×0.6m, and rill erosion occurred on the slope during the rainfall , the rain stopped after 60 minutes; then the Trimble GS200 3D laser scanning system was used to measure the topography of slope erosion. After the scanning was completed, the complete slope DEM (that is, digital elevation model) data was obtained, and then the DEM data was imported into Arcgis for data processing (this processing The process is to import DEM data i...

Embodiment 2

[0108] This embodiment quantifies the rill development morphological characteristics using the comprehensive quantitative parameters of the rill morphology constructed in Example 1 (that is, the verification test of the comprehensive quantitative parameters of the rill morphology constructed in Example 1), as follows:

[0109] Using the simulated rainfall method, it is carried out in a 20° steep slope test soil tank with a size of 5m×1m×0.6m, and the soil bulk density is 1.25g / cm 3 , the rainfall intensity is 120mm / h. After the test, the statistics of the rill network graphs under different rainfall durations were carried out. Table 15 shows:

[0110] Table 9 Statistics of the number of tributary ditches at different levels under different rainfall times

[0111]

[0112] Table 10 Calculation process of bifurcation ratio of average rill network in 14 minutes of rainfall

[0113]

[0114] Table 11 Calculation process of the bifurcation ratio of the average rill network...

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Abstract

The invention discloses a comprehensive quantification method for morphological characteristics of slope rill development based on multiple dimensions. The method firstly obtains rill morphological multi-dimensional characteristic parameters and sediment production process data, and then uses a grey correlation analysis method to evaluate the sensitivity of the above-mentioned rill morphological multi-dimensional characteristic parameters so as to obtain sensitive parameters, establishes multiple regression models based on the obtained sensitive parameters, and then constructs comprehensive quantitative parameters of the morphological characteristics of the rill development. This method overcomes the insufficiency of the existing single-factor quantitative parameters to describe the complexity of the rill development, and quantifies the development degree of the slope rill from a multi-dimensional perspective, and a method for studying the spatial variability problem of rill morphologyin the process of slope erosion is provided so as to improve the scientificity and accuracy of quantification of the rill morphology.

Description

technical field [0001] The invention belongs to the technical field of soil erosion. Specifically, it involves a comprehensive quantification method based on multi-dimensional morphological characteristics of slope rill development. Specifically, it is a method to comprehensively quantify the complexity of the slope rill network from multiple dimensions, thereby quantitatively expressing the development degree of rill erosion. technical background [0002] Rill erosion is an important form of water erosion on loess slopes, and it is also a special stage of transformation from surface erosion to gully erosion. A rill is a channel formed by linear flowing water on a flat ground composed of loose soil layers. It is mostly found in slope farmland on the Loess Plateau. Its depth and width do not exceed 20cm. It can be filled and leveled by manual cultivation. Due to its small scale and shallow depth, So the shape is very unstable. The appearance of rills provides transport cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/18
CPCG06F17/18G06F30/20
Inventor 孙维营张攀李莉侯欣欣陈江南肖培青杨春霞杨二吕锡之王智慧申震洲倪用鑫杨吉山董飞飞
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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