基于ArcGIS的赣州市土地脆弱性分析与评价

Land Vulnerability Analysis and Evaluation Based on ArcGIS in Ganzhou City

以江西省赣州市为例,利用通用水土流失方程,对该地区进行土地脆弱性分析和评价。讨论了研究区域的土地侵蚀脆弱性的高低分布特征以及其在不同因素作用下的土壤侵蚀空间分异特征。分析结果表明:1)中部和周边部分地区土壤侵蚀最低,这部分地区多位于山区、丘陵等海拔相对较高区域,同时也是降雨量相对较少的区域。2)以人类活动,沿赣州市的道路网分布为空间分布规则,在其邻域内土地的脆弱性依次增高,以道路网和工业区、农业区为最高,向周边区域逐渐递减,说明人类活动对土壤侵蚀的控制措施影响巨大。3)水土流失方程理论中的降雨量、地形等因素是土壤脆弱性变化的潜在因素,而人类活动是土地侵蚀发生、发展、变得严重的主导因素。

This paper takes Ganzhou City of Jiangxi province as an example to analyze and evaluate the land vulnerability in this area.The distribution characteristics of soil erosion vulnerability in the study area and the characteristics of soil erosion space under different factors are discussed. Analysis results show that： 1） The lowest parts of the central and peripheral soil erosion,this parts is located in the mountains,hills,such as relatively high altitude area,is also a relatively less rainfall area. 2） In human activities,along the Ganzhou City road network distribution for the space distribution rule,the vulnerability of the land within their neighborhood,in turn,increases,the road network and industrial agriculture as the highest,to the surrounding area is gradually diminishing,shows that human activity is a huge influence on soil erosion control measures. 3） the rainfall of water and soil loss equation theory,terrain factors such as soil the vulnerability of the potential factors,and human activity is the erosion occurrence,development,severe becomes the dominant factor.