耕地变化与人文驱动因素分析——以会宁县为例

对会宁县耕地变化与人文驱动因素进行了研究,结果表明:2000～2009年会宁县耕地面积变化表现波动性中的下降,上升—平稳—下降—平稳特征显著。但在各个乡镇的表现态势不一致,利用ArcGis生成耕地相对变化率空间分布图,发现变化率在0.59～0.75的区域是耕地面积减少最为明显的区域,主要有会师镇;变化率在1.40～1.56的区域是耕地面积增加最为明显的区域,变化除了一部分自然和政策的因素外,主要受人口和经济增长影响。

Variation of Cultivated Land and the Humanistic Driving Forces

The variation of cultivated land and humanistic driving factors in Huining County were studied.The results showed that during 2000-2009,the variation of cultivated land area in Huining County indicates fluctuant decreasing,the characteristics of rise-stable-drop-stable is obvious.But the situation of each township is not consistent.The spatial distribution map of the farmland relative change rate was got by ArcGis.It was found that the area whose change rate is between 0.59 and 0.75 is the area whose acreage has dropped the most obviously,mainly include Huishi County;the area whose change rate is between 1.40 and 1.56 is the area whose acreage has risen most obviously.Besides the influence of the natural factor and policy factor,the variation reasons mainly include population and economic growth.