青藏高原矿区土地利用动态变化研究——以青海省聚乎更矿区为例

Research on dynamic change of land use in Qinghai-Tibetan Plateau mine Area——A case study of Juhugeng mine area

基于聚乎更矿区2004年、2009年和2014年三年同期的TM影像,建立随机森林分类器,采用随机森林分类方法对位于木里煤田的聚乎更矿区以及周边区域的土地覆盖进行了分类研究,从土地利用数量变化模型、土地利用程度变化模型对矿区土地利用动态变化情况进行了分析,研究表明:(1)自2004年开采矿以来研究区高寒草甸、高寒沼泽草甸面积呈减少趋势,变化幅度最大的是城镇村与工矿用地;(2)矿区土地利用程度变化率大于0,综合指数成上升趋势;(3)对矿区的土地利用驱动因素进行分析,主要受开采活动影响。今后应加大对矿区的生态重建工作与土地复垦进程,保证矿区土地平衡,促进矿区生态系统、经济系统和社会系统协调发展。

Based on TM images for 2004, 2009 and2014 in Juhugeng mine, by establishing？ the random forest classifters, the land cover of the Juhugeng mine and surrounding area were classified by using the random forests algorithm in the Mull mine, the mining land use dynamic changes were analyzed in terms of the quantity change models and the degree change model of land use. The results showed that： （1） Alpine meadow, the alpine marsh meadow area showed a decreasing trend since mining in 2014, and the biggest percentage change areas were the urban village and the industrial land; （2） Change rate of the land use was greater than 0, composite index showed？ the upward trend. （3） Driving factors of land use in the mining area were mainly affected by the mining activities by the analysis. In the future, the ecological reconstruction of mining and the land reclamation process should be enhanced to en- sure the mine land balance, promote the coordinated development of the mining ecosystems, the economic systems and the social systems.