基于生态足迹模型的小流域水土保持可持续发展定量评估——以王家沟小流域为例

以黄土丘陵区王家沟小流域为研究对象,利用生态足迹模型对该流域近50年(1959~2008年)的生态足迹与生态承载力进行了测算。结果表明,近50年来王家沟小流域的生态承载力总体上是大于生态足迹,处于生态盈余状态,且呈现稳中增长的趋势,小流域生态系统处于一种可持续发展状态。其中,耕地和林地的生态盈余较大,呈现逐年增加的态势;草地处于生态赤字状态,生态压力较重。

Evaluation of Sustainable Development for Soil and Water Conservation of Wangjiagou Small Watershed Based on Ecological Footprint Model

Abstract With Wangjiagou small watershed in the loess hilly and gully region as the object,ecological footprint model was applied to calculate the ecological footprint and ecological capacity in recent 50 years （1959 -2008 ）. The results showed that the ecological carrying capacity of Wangjiagou small watershed in recent 50 years was generally larger than ecological footprint,in the ecological surplus state and showing steady growth trend. The ecological system was in a sustainable development state. The ecological surplus of arable land and forest land was large, show- ing an increasing trend year by year. Grassland was in the state of ecological deficit, and the ecological pressure was heavy.