湿地动态变化及驱动因素分析——以重庆市北碚区为例

Wetland Dynamic Changes and Their Actuating Factors ——A Case Study of Beibei District of Chongqing

以重庆市北碚区各乡镇的湿地利用类型为研究对象,依据该研究区的社会经济土地数据和湿地利用变更数据,采用单一土地利用动态度模型,综合土地利用动态度模型及土地利用相对变化率模型,对研究区域1999-2007年间各乡镇的湿地利用类型动态变化情况和驱动力因素进行了分析.结果表明:在这8年间北碚区的湿地总体面积在不断的减少,其中以人工湿地减少的最多,特别是灌溉水田和望天田减少的面积占了研究区湿地减少总面积的99%;另外,研究还表明,湿地面积的减少与气温升高和人类活动有直接关系.

Taking the wetland use type at each town of Beibei District of Chongqing as research object and according to the local data of social economic land and wetland use change,this paper analyzes every town＇s wetland dynamic changes and their actuating factors from 1999 to 2007 on the models of single land use dynamic index and comprehensive land use dynamic index as well as the relative change rate of land use.The results show that the total area of wetland in Beibei unceasingly reduced during the eight years,especially the constructed wetland.The irrigated and non-irrigated paddy land accounts for 99% of the reduced area.Besides,the reduction of wetland area is shown to be directly related to the climate warming and human interfernce.