Analysis of approaches to determination of extent of erosive hazard of slope lands

Abstract

The purpose. Comparison and analysis of approaches used to determine the levels of erosion dangers, based on the assignment of land to technological groups and with the aid of Mirtskulava Hydromechanical Erosion Model (HEM). Methods. Geoinformational, mathematical- and-statistical. Results. In soil protection rationing of anthropogenic load on the technological groups of lands is a common practice. In this case, the only criterion for the selection of such groups is the angle of the earth surface. At the moment, the valid State Standard for calculation of the potential losses of soil is the one with the help of HEM. This Standard takes into account the basic meteorological, geomorphological, hydrological and soil indices, that determine the amount of potential losses of soil, and makes it possible to make informed design decisions in soil conservation. Conclusions. The assignment of land to the technological group has the features of a quality procedure that does not allow reasonable planning of crop rotation and agrotechnical tools for erosion- safe use of land. The main problem that occurs while using the HEM is the accuracy of input arguments. Their incorrect input leads to a multiple increase (decrease) of predictive values. Therefore there is a need to create database of reliable values of arguments for the erosive event scenarios.