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《Journal of Agro-Environment Science》 2006-04
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GIS-based Assessment on Sensitivity to Soil Salinization in Tianjin

ZHANG Zheng-yun,SUN Yi-chao,SUN Jing,SHAO Xiao-long,LI Hong-liu(Tianjin Academy of Environment Science,Tianjin 300191,China)  
Soil salinization has become one of the five soil problems that confused human beings.The current data from FAO proved that all kinds of saline soils occupy 10% of the whole earth surface,distribute almost all the continents,different climate belt and elevation belt.Tianjin land is located in the place of sea regression,which is the main reason that 65.6% of the Tianjin soil is affected by salinization differently.Our study is to find the different sensitivity of different location.According to three influencing factors,aridity index,mineral degree in groundwater and terrain,based on GIS,the single factor attribute database is established using the known criterion,and the sensitivity of three single factors are assessed.Through special overlay analysis of the three single factor sensitivity,the general sensitivity to soil salinization and the spatial heterogeneity in Tianjin are assessed.The results show that most part of Tianjin area is mid-sensitive land,which constitutes the expansive plain area in middle Tianjin,coastal area and Dagang district are the high and super sensitive region,north of Ji county belongs to non-sensitive region.
【Fund】: 国家科技部(863)攻关课题(2002AA648010)
【CateGory Index】: S156.4
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