神府东胜矿区沙漠化的现状及趋势

Present conditions and future trends of desertification in Shenfu and Dongsheng coal fields

在野外调查、沙漠化制图及资料计算的基础上，对矿区沙漠化的现状及趋势进行了分析．结果表明，矿区现有沙漠化面积２４５７．０ｋｍ２，占总土地面积的６４．０％，其中轻度１１２０．０ｋｍ２，中度５３１．４ｋｍ２，强度８０５．６ｋｍ２．煤田开发前沙漠化“自然”增长速度为０．５％．开发前期（１９８８年～１９９１年）受建设施工活动影响，沙漠化增长速度０．９５％，为开发前沙漠化“自然”增长速度的１．９０倍．开发后期（１９９２年～２００６年）建设施工活动仍然频繁，地面塌陷和地下水位降落日益加剧，沙漠化增长速度将达１．１８％，为开发前沙漠化“自然”增长速度的２．３６倍．沙漠化增长趋势明显。

On the basis of interpretation of infrared photography(scale 1∶50,000) and field survey, the present conditions and future trends of desertification in the Shenfu and Dongsheng coalfields have been studied. At present, 2,456 km 2 or 64% of the mining area is affected by desertificaiton, of whcih 1,120.0 km 2 are slightly affected, 531.4 km 2 moderately, and 805.5 km 2 severely affected. The rate of desertification in the pre construction period is 0.5%/a. In the early stage of development (1988￣1991), the rate was increased to 0.95%/a due to construction activities, which is 1.9 times of that in the pre construction period. In the later stage(1992￣2006), the rate of desertification would be 1.18%/a, or 2.36 times of that before development began.