关键词: 生态补偿, 非点源污染, 土地利用变化, 分布式水文模型, 香溪河流域

Abstract: Quantitative calculation of eco-compensation is an important part of establishing eco-compensation mechanism and the key of implementing basin eco-compensation mechanism. At present, most of the accounting of river basin eco-compensation is based on the rough estimation of the annual average data, which lacks a fine and accurate accounting process. By constructing a distributed watershed non-point source model and considering the fine changes of hydrology and water quality, this paper innovatively proposes a basin eco-compensation refined dynamic calculation method, which can calculate the basin eco-compensation on the daily time scale. The model is applied and verified by taking the Xiangxi River Basin as an example. The results show that the eco-compensation value obtained in 2015 increased by 12,071,400 RMB compared with that in 2005. Moreover, for per square kilometer of reforesting the cultivated land, about 26,000 RMB in eco-compensation should be paid for the Xiangxi River Basin due to reduced pollution load and improved ecological environment.

Key words: eco-compensation, non-point pollution, land-use change, distributed hydrological model, Xiangxi river basin