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《Journal of Soil Water Conservation》 2004-02
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Research on Cropland Resource Evaluation Based on GIS and PSR Model

NIE Yan, ZHOU Yong, ZHU Hai-yan nistry of Agriculture, Wuhan 430070)  
The resource and environmental quality evaluation is carried out in the Houhu farm enterprise of Jianghan Plain based on Arc/Info and the press-state-response model(PSR) which selects the soil integrated pollution index as a pressure index. The evaluation results can provide gist for reasonable land-utilization programming and environmental protection. To begin with, the factors affecting resource and environmental quality are decided by Delphi and PSR model and the weight of corresponding factors is calculated by AHP method. Then Arc/Info is used to establish spatial database by digitizing relational layers and developing buffer analysis. Furthermore, according to membership function of evaluation factors, original data of the specimens and the synthetic index method, environmental quality indexes of assessment units for cropland are calculated and the quality grades are divided by frequency distribution of synthetic index values. Finally, the map and data set of results in the Houhu farm enterprise are obtained automatically with Arc/Info. Results indicate that the environmental quality in this area is in medium and high side, the percentage of area in level 2 and 3 amounts to 47.27% and 35.83% respectively. By analyzing correlation between the soil contaminated status and environmental quality of cropland, the prominent plus correlation exists between both.
【Fund】: 新一轮国土资源大调查土地监测与调查工程——农用地分等定级与评估项目;; 国家自然科学基金项目(批准号:40271056)资助
【CateGory Index】: TP399
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