高泉小流域生态恢复的水土效益评价研究

Benifit Evaluation of Water and Soil Ecological Restoration in Gaoquan Small Basin

依据生态经济学原理,采用层次分析法,建立了高泉小流域生态恢复的水土效益评价指标体系和评价模型。根据指标体系和评价模型对研究区的坡地、梯田的草地、林地和农田等不同类型土地进行生态恢复的水土效益进行评价。评价结果为:高泉小流域生态恢复的水土效益指数为44.819。其水土效益排序指数排序为:土壤养分效益>林草地生态恢复效益>土壤水分含量效益>农田土地生产力效益。总的研究结果表明:生态恢复治理措施对农田土地生产力和土壤水分效果较之于土壤养分和林草地植被恢复效益来说低,这种评价结果比较符合当地实际。也说明该小流域通过治理后,生态恢复还处于初始阶段。图1,表2,参7。

The benefit evaluation index system and evaluation model were established on the basis of the principles of ecological economics, and by using Analytic Hierarehy Process for the Gaoquan small watershed ecological restoration. According to the Index System and the evaluation mode for the slopes in the study area,terraced fields of grass, woodland and farmland,such as different types of land for ecological restoration of water and soil were evaluated. The results showed that the ecological restoration water and soil benefit index for Gaoquan small watershed was 44.819. Benefits of its water and soil for the order index are soil nutrient 〉 forest and grassland ecological restoration 〉 soil moisture content 〉 farm land productivity. The overall results showed that the benefit of the ecological restoration from land management measures on the farm productivity and soil moisture are less than that from the soil nutrients and the grassland and forest vegetation restoration in the Gaoquan small basin. The results of this evaluation in line with local realities The results also showed that the small watershed after management is still at its initial stage.