Application of Differential Absorption and Scattering Method for Evaluating Pollution of Underlying Surface of Agricultural Lands

Abstract

The solution to the problem of environmental protection and rational use of natural resources depends largely on the development and implementation of methods for air and water operational control. Thus, it is very interesting to consider the issues relating to various aspects of remote monitoring. These studies are primarily aimed at identifying focuses of atmosphere and ocean pollution, evaluating biological productivity of sea, the state of the underlying surface and vegetation. The analysis of the possibility of using the earth lidar sensing dual-frequency method to monitor the contamination of the agricultural land underlying surface is conducted. Construction of analytical model of polluting substances detection process is based on the differential absorption and scattering (DAS) method, which is the most sensitive method for measuring small concentrations of gases. This method takes into account the factors that determine the accuracy of the lidar measurements and characterize both location conditions on an extensional track and studied area parameters. An analytical model of detection process of harmful air pollutants is developed. The model describes the process of comparing measured concentration of gas component molecules to its threshold (background) value. Study the feasibility to use the differential absorption and scattering method demonstrates that the harmful gas impurities detection process can be described by an analytical model taking into account the remote sensing of the inclined tracks conditions and a dependence of measurement effectiveness on the composition of the studied area and the attenuation of the sensing radiation by absorbing background gas components on the entire length of the track.