Sensitivity Of Soil Salinization In The Lakeside Oasis Of Bosten Lake Based On RS/GIS

Soil salinization of soil salinization possibility size sensitivity refers to the commonaction of natural conditions and human factors, the sensitivity evaluation ismainly identification is easy to form soil salinization area, and determine the type, soilsalinization may occur and the scope of possible. Soil salinization sensitivity strengthdepends on the factors affecting the distribution of intensity of each influence, statusand multi factors combination. In this study, the lakeside oasis of Bosten Lake as astudy area, through field investigation and laboratory analysis, factor analysis andstudy area based on the environmental conditions affect the formation in soilsalinization, the buried depth of groundwater, groundwater salinity, evaporation andrainfall and land-use types effects of soil salinization sensitivity factor establishmentof evaluation, classification standard of soil salinization sensitivity, using AHP, tocalculate the weight of each affecting factors, with the help of RS and GIStechnology, using grey clustering model, suggestions and Counter measures to soilsalinization sensitivity in comprehensive evaluation and put forward the prevention ofsoil salinization.The results show that:(1) Based on the sensitivity analysis of soil salinization of groundwater depth,lakeside oasis of Bosten Lake soil salinization sensitivity by highly and moderatelysensitive, slightly sensitive area is smallest. The soil salinization is highlysensitive area of1059.30km2, soil salinization and moderately sensitive area of619.28km2, soil salinization light sensitive area of42.08km2.(2) From the analysis of sensitivity of soil salinization of groundwater salinitysensitive area based, distributed4levels throughout the study area, which inthe lakeside zone of soil salinization in oasis of sensitivity to light sensitive,moderately and highly sensitive times. Area of light sensitive area is673.43km2, areaof highly sensitive region is488.70km2, the area of moderate sensitive area is240.83km2, and the area of non sensitive area is262.98km2.(3) Used to extract the salinization of soil types and land use classification, superposition calculation of salinization of soil types and land use, calculate the sensitivityindex of different land use types, according to sensitivity index, each kind of landuse type is divided into different sensitive areas. Unused land, cultivated land,grassland, urban land and water sensitivity index were0.2854,0.0171,0.0037,0.0011and0. The unused land belongs to the highly sensitive area, cultivated land belongingto the moderately sensitive areas, grassland and urban land belonging to the light sensitive area, water belongs to the non sensitive area.(4) According to the classification standard of soil salinization sensitivity thandrop based on steam, the study area nearly50years of spring, summer, autumn andwinter steamed drop than the average values were20.00,5.89,22.25and12.22; inaddition to the summer soil salinization is moderately sensitive sensitivity, sensitivityof soil salinization other three seasons were highly the sensitive range, the studyarea nearly50years of soil salinization sensitivity are highly sensitive range.(5) From the analysis of the sensitivity of soil salinization comprehensiveevaluation, the smallest proportion in the whole study area of non sensitive area, thearea is57.60km2, accounted for1.12%; area of light sensitive area of571.86km2, accounting for a total area of11.15%of the study area; area ofmoderate sensitive area is862.11km2, the proportion of16.80%. Area of highlysensitive area is336.15km2, and the proportion is6.55%.