Research And Application On Wind Erosion Model Based On Remote Sensing-

China is one of the countries which were worst affected by wind erosion, for its large arid and semi-arid areas. Quantitative evaluation of wind erosion in an area is essential for overall ecology planning, economic development, production and life. Many scholars have made a lot of researches on the wind erosion model, but there is still much faultiness in theories and applications of rapid estimation of wind erosion in large-scale regions.Taking Xinjiang Production and Construction Corps as a typical region, this paper establish a rapid estimation model of large-scale wind erosion in arid areas, and construct a software system of wind erosion, based on remote sensing, in order to offer some reference for research on rapid estimation model and rules of wind erosion, and provide important basis for the generalization and application of rapid estimation technique. To be specific, the principal achievements of this thesis are as follows:(1)In comparison with the wind erosion models all over the world, we select the model of wind tunnel experiments for the base model. According to the actual condition of study area, we add the factors of soil moisture, soil particle size and wind erosion measures, in order to modify the model.(2)Based on the numerical simulation and experimental research of the wind erosion amount of soil in 2010, wind erosion prediction model are verified. After compared and analyzed, it shows that the results of simulation agree well with that of tests, so the practicability and credibility of the model is verified, the correcting model can be used in the area of Xinjiang Production and Construction Corps.(3)Systemically summarizes the methods and techniques of monitoring, calculation, extraction and spatial description of the model factors (wind, surface roughness, vegetation coverage, soil moisture, soil particle size, wind erosion measurement), and find that the raster data can provide support for wind erosion prediction model.(4)Based on the correcting model and the idea of raster overlay operations, a C/S software system of wind erosion is built up. After inputting the raster data of all factors to the modeling system, we will quickly obtain the spatial and temporal change of wind erosion modulus and wind erosion intensity classification, to monitor the conditions of regional wind erosion quantitatively and easily.(5)The results of simulation show that the wind erosion amount of Xinjiang Production and Construction Corps has an obvious law:sand>cultivated land>grassland. The occurrence of wind erosion concentrated in the specific month, and the wind erosion amount is large. Therefore, the conservation tillage measures and the arrestment of sand expansion is essential for the prevention and cure of wind erosion and the improvement of Ecological Environment in the area of Xinjiang Production and Construction Corps.