广西壮族自治区平果铝土矿区待复垦土地适宜性评价

以广西壮族自治区平果铝土矿区为研究对象,采用四层逐级分类指标划分待复垦土地评价单元类型,运用权重指数和法对矿区待复垦土地的适宜性进行预测性评价.评价结果表明,(1)无污染的4:1厚层顶板土十地表土平台的最佳适宜性用途为Ⅲ等旱地;(2)无污染的3:1厚层底板土+粉煤灰平台的最佳适宜性用途为Ⅱ等早地;(3)无污染的4:1薄层顶板土+地表土斜坡的的最佳适宜性用途为Ⅰ等园地;(4)无污染的3:1薄层底板土十粉煤灰斜坡的最佳适宜性用途为3等林地.该预测结果可为矿山企业制定复垦规划提供科学依据,有利于矿山企业节约复垦成本及平果铝土矿区土地资源的可持续开发与利用.

Land Suitability Evaluation for Reclamation of Bauxite Region in Pingguo County of Guangxi Zhuang Autonomous Region

This paper classifies the types of land evaluation units using a four hierarchy of indexes step by step and evaluates the land suitability for reclamation of bauxite region in Pingguo County of Guang xi Zhuang A uto nomous Region by the way of sum of weig hing and indexes. Results are as follows: ( 1) The best suitability of the thick platform non-polluted, which is composed of top soil and surface soil and the ratio of top soil to surface soil is 4:1, is the third-class dryland. ( 2) The best suitability of the thick platform non-polluted, which is composed of bottom soil and fly ash and the ratio of bottom soil to fly ash is 3:1, is the seco ndclass dryland. ( 3) The best suitability of the thin slop non-polluted, which is composed of top soil and surface soil and the ratio is 4:1, is the first-class garden plot. ( 4) The best suitability of the thin slop non-polluted, which is composed of bottom soil and fly ash and the ratio is 3:1, is the woodland o f the third grade.The result may provide a scientific basis of reclamation planning for mining enterprises and it is beneficial for reducing cost and the sustainable development and utilization of land resources in bauxite region in Pingguo County.