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绿洲荒漠化的根本原因是水土资源利用不平衡的矛盾引起的 ,定量化的研究二者的互相作用将有助于绿洲区荒漠化防治模式的建立和该区水土资源的持续利用。文章针对民勤绿洲区水土资源利用的现状 ,把GIS与专业计算地下水流的FEFLOW软件结合 ,利用ArcViewGIS处理区域土地利用变化的空间数据 ,与所建立的区域地下水流动的模型相联接 ,模拟了绿洲区土地利用对地下水位的影响。结果表明 ,本文所建立的定量化评价方法能很好的模拟土地利用对区域地下水位变化的作用 ,如保持民勤绿洲内水土资源利用的现状模式 ,则民勤绿洲内部的地下水埋深呈进一步下降的趋势 ,这将导致绿洲荒漠化问题进一步加剧。
The root cause of desertification in oasis is caused by the imbalance of utilization of water and soil resources. The quantitative study of the interaction between the two will help to establish the mode of desertification control and sustainable utilization of water and soil resources in this area. In this paper, according to the status quo of the utilization of water and soil resources in Minqin Oasis District, GIS and professional calculation of groundwater flow FEFLOW software, the use of ArcViewGIS processing of regional land use change spatial data, and the establishment of regional groundwater flow model connected to simulate the oasis Impact of Land Use on Groundwater Table. The results show that the quantitative evaluation method established in this paper can well simulate the effect of land use on the regional groundwater level change. For example, the current groundwater level in Minqin Oasis is further enhanced by maintaining the present status of water and land use in Minqin Oasis Declining trend, which will further aggravate the problem of desertification in the oasis.