刘家峡库区生态承载力研究

刘家峡库区自然条件严酷，生态环境脆弱，水土流失严重，亟需加快治理步伐。本研究通过计算分析刘家峡库区、库区南部三坪沟流域、库区北部碾子沟流域的生态承载力状况，为库区水土保持生态环境建设提供理论支撑。研究以生态承载力理论与方法为指导，建立了生态弹性度、资源承载力、资源承压度3级层次的生态承载力综合评价指标体系。分析表明，刘家峡库区目前生态弹性度为不稳定状态，水资源承载指数为低承载，土地承载饱和度为严重超载，库区处于不可持续的发展状态。应以提高库区生态承载力为目标，开展库区水土流失综合治理。

Ecological carrying capacity of the Liujiaxia reservoir

Due to harsh conditions,the ecological environment of Liujiaxia reservoir is frail and the soil erosion here is serious.It is urgent to improve the ecological environment.Ecological carrying capacity of the Liujiaxia reservoir,the Nianzigou small watershed of the north Liujiaxia reservoir and the Sanpinggou small watershed of south Liujiaxia were calculated in this study to provide theoretical support for improvement of ecological environment construction in the study area.Based on theory of ecological carrying capacity,this study established comprehensive index system,which included ecological resilience,resource carrying capacity and resource carrying-pressing index.The results of this study showed that ecological resilience was unstable,and carrying capacity index of water resource was low,and soil carrying saturation was severe overloading.This study suggested that the Liujiaxia reservoir was currently unsustainable development.It is effort to develop comprehensive management measures of soil erosion to improve ecological carrying capacity of Liujiaxia reservoir in the future.