基于生态足迹模型的耕地脆弱性分布差异研究--以德阳市为例

Study on the Distribution Difference of Cultivated Land Vulnerability Based on Ecological Footprint Model:a Case Study in Deyang City

基于生态足迹模型,对德阳市耕地近10年来的生态足迹、生态承载力、生态赤字、脆弱性指数进行测算,再结合ArcGIS进行空间可视化表达,分析出其空间分布规律.结果表明:1)德阳市近10年来耕地的生态足迹呈略微下降趋势,各区县内部耕地的生态足迹变化相对较稳定;2)生态承载力呈现出低速下降趋势,在各区县的空间分布有一定的差异;3)生态盈亏状态表现为多数区县属于生态盈余区域,少数区县属于生态赤字区域;4)脆弱性总体呈现出增加的趋势,空间分布上的特点呈现出"两翼极脆弱,中间较稳定"的状态.

Based on the ecological footprint model,the ecological footprint,ecological carrying capacity,ecological deficit and vulnerability index of Deyang City’s cultivated land in the past 10 years were measured,and then the spatial visualization method was combined with Arcgis to analyze its spatial evolution law. The results show that: 1) the ecological footprint of cultivated land in Deyang City has declined slightly in the past 10 years,and the ecological footprint change rate of cultivated land in each district and county is relatively stable;2) the ecological carrying capacity shows a downward trend with a low speed,and the spatial distribution in each district and county has a certain difference;3) the state of ecological profit and loss shows that most districts and counties belong to the ecological surplus area,and a few districts and counties belong to the ecological deficit area;4) vulnerability generally shows an increasing trend,and the characteristics of spatial distribution show a state of"the two wings are extremely fragile and the middle is relatively stable".