Method for estimating amount of soil loss in Karst area

Abstract

The present invention discloses a method for estimating the amount of soil loss in a Karst area. The method comprises the following steps: when a Karst area accounts for 0% of a total area, using a revised universal soil loss equation to estimate the amount of regional soil loss; establishing a soil loss equation of Karst area; establishing a ground surface soil loss contribution ratio formula of Karst area; according to the revised universal soil loss equation, the soil loss equation of Karst area and the surface soil loss contribution ratio formula of Karst area, obtaining a model equation for estimating the amount of soil loss in Karst area or in Karst drainage basin; and establishing a calculation formula of the amount of soil loss in a hybrid region of a normal landform and pure Karst landform. The method solves the technical problems such as that the amount of soil loss in Karst area cannot be accurately estimated because a soil erosion process in Karst area is affected by many factors of Karst area comprising the landform, lithology, soil layer thickness, soil formation rate, and rock exposure rate.

Description

technical field [0001] The invention belongs to the technical field of calculating soil loss in karst areas, in particular to a method for estimating soil loss in karst areas. Background technique [0002] The karst environment has strong particularity and complexity, and the soil characteristics and soil erosion effects are also affected by multiple factors in non-karst areas. Therefore, the estimation method of soil loss in karst areas has always been the focus of many scientists at home and abroad. clear scientific issues. In the karst areas of southern China, because researchers have different understandings of the soil erosion process in karst areas and the methods used to estimate the amount of soil loss, and the soil erosion process in karst areas is affected by its topography, lithology, soil thickness, and soil formation. Influenced by many factors such as soil erosion rate and rock exposure rate, it is still very difficult to accurately estimate the amount of soil...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for estimating the amount of soil loss in karst areas, so as to solve the problem that the soil erosion process in karst areas is affected by its topography, lithology, soil layer thickness, soil formation rate, and rock exposure rate in the prior art. Due to the influence of many factors, it is impossible to accurately estimate the amount of soil loss in karst areas and other technical problems

Images