基于土地利用连通度模型的黄骅市土壤盐渍化风险区域分布

Distribution of Soil Salinization Risk Areas Based on Land Utilization Connectivity Model in Huanghua City

为快速预测黄骅市土壤盐渍化风险区域分布情况,对黄骅市土地利用类型盐渍化敏感性进行分析,并在此基础上计算阻力系数,进而应用土地利用连通度模型划分出极高、高、中、低4个等级的风险区。结果表明:黄骅市土壤盐渍化极高风险区主要集中于北部的未利用地、不稳定耕地范围内;高等风险区由西北到东南的零散分布,包括水浇地、未利用地等区域;中等风险区主要集中于高等风险区周边的水浇地和一些有植被覆盖的未利用地区域;低等风险区位于黄骅市西部和南部区域。

The resistance coefficient of different land-use types was calculated based on analyzing soil salinization sensibility of different land-use types and then the land in Huanghua City were divided into 4 risk areas with very high, high, middle and low level by the land-use connectivity model to realize the objective of salinization risk evaluation for rapidly forecasting distribution of soil salinization risk areas in Huanghua City. Results： The soil sanilization risk areas with very high level mainly localize in the areas of unused land and unstable cultivated land in northern Huanghua City. The soil sanilization risk areas with high level scatteredly distribute from northwestern to southeastern including irrigable land and unused land areas. The soil sanilization risk areas with middle level mainly localize the areas of irrigable land around high risk areas and unused land without vegetation cover. The soil sanilization risk areas with low level locate in western and southern areas of Huanghua City.