西北地区水库黄土库岸稳定分析

应用土地资源评价理论、GIS和GPS技术,选取地处南方红壤侵蚀区燕沟小流域内某一典型区域作为研究对象,结合模糊数学方法和指数和法对研究区域内的土地资源进行评价。结果显示,研究区55.1%的土地属5等地,土地质量较差,土壤侵蚀是制约该区域的土地资源利用的瓶颈因素。提出采取工程措施与植物措施相结合的方式,尽快恢复与培育土壤肥力是该区域土地合理利用的重要措施与方向。同时,研究表明,采用GIS,GPS技术,结合模糊数学方法进行小流域大比例尺土地资源评价的方法是科学可行的,在此类土地资源评价中具有推广应用前景。

Stability Analysis of Loess Banks of Reservoirs in Northwestern China

Taking the typical research region of Yangou, a small watershed in an eroded red soil area of south China, as an example, an evaluation of land resources based on GIS and GPS technologies, employing fuzzy mathematics and index methods, has been undertaken. The evaluation assigns 55. 1 % of the land area in the watershed to five grades, with general land quantity being low in the area. Soil erosion is the main resource limiting factor, and adoption of engineering measures, planting measures and combinations there are of importance to the reasonable utilization of land resources and to the enhancement of soil fertility in the region. Application of GIS, GPS and fuzzy mathematics methods is scientifically sound and feasible for the evaluation of the land resources at the scale of small watersheds. This research expands the field for this type of land resources evaluation.