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Method for calculating soil loss amount caused by water erosion

A technology of soil loss and calculation method, which is applied in the direction of soil material testing, material inspection products, etc., can solve problems such as soil loss calculation, and achieve the effect of reducing field investigation work

Active Publication Date: 2014-05-21
BEIJING FORESTRY UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of calculating the amount of soil loss after the rainfall, the present invention provides a method for calculating the amount of soil loss by water erosion aimed at the impact of rainfall velocity and slope angle on the amount of soil erosion. The features are as follows:

Method used

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  • Method for calculating soil loss amount caused by water erosion
  • Method for calculating soil loss amount caused by water erosion
  • Method for calculating soil loss amount caused by water erosion

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Embodiment Construction

[0018] (1) Measuring the slope with a measuring tape, the length is b meters, the width is a meters, and then the compass is used to measure the slope angle of the slope as θ, and the slope is infinitely divided into n Δ square units, so the Δ side length tends to 0;

[0019] (2) Assume that the rain falls from a height of H, and the rain gauge records the duration of the rain as T hours, the number of rains is n times, and the average height of the rain on the slope is h 雨 , then the precipitation quality of each slope square unit is: The initial velocity of rainwater falling on the slope is: The initial velocity along the slope direction is: V 0 =V 雨 sinθ;

[0020] (3) Use soil tanks to receive the soil eroded by rainwater, and then calculate the amount of soil loss Q. Q÷S (slope area) = average soil loss height h 土 , the mass causing soil loss in each square unit is m 土 = h 土 -Δ 2 ·ρ 土 , where ρ 土 is the soil type density of the slope, the initial initial veloci...

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Abstract

The invention proposes a method for calculating soil erosion amount caused by rainfall by using elements such as rain water droplets speed and slope angle, recording the slope angle and the landing speed of the rainfall, and calculating the soil erosion through related mathematical models. The problem that the soil erosion amount is hard to estimate and predict is solved.

Description

1. Technical field [0001] The invention relates to a calculation method of soil loss caused by water erosion. 2. Technical background [0002] As an important technical tool to understand the process and intensity of soil erosion, grasp the development dynamics of land resources, guide people to rationally use land resources, manage and maintain the long-term living environment of human beings, the soil erosion model has an important theory for the comprehensive management of small watersheds and soil and water conservation planning in accordance with. In this study, through the analysis of small forestry data in Beijing and the study of soil erosion models at home and abroad, combined with the topography and climate conditions of the study area, a soil erosion model suitable for Beijing was constructed to provide ecological governance for various departments. The work provides a scientific basis. [0003] The present invention records the data of rainfall speed, slope ang...

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Application Information

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IPC IPC(8): G01N33/24
Inventor 冯仲科闫飞宋亚男
Owner BEIJING FORESTRY UNIVERSITY
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