Abstract:This study was conducted along Liuxi River watershed, a main branch of Beijiang River, in Guangdong Province. Based on the non-point source (NPS) pollution and riparian buffer’s reduction in current situations of the Liuxi River Basin, the differences of NPS pollution reduction improvement of different restoration strategies were investigated by scenario simulations. In order to compare the efficiency of different restoration strategies, the relationships between the improvement of NPS reduction rate and the increase of buffer area were interpreted by benefit-cost index. The results showed the NPS reduction rate performed remarkable spatial variation. Each scenario had improved the NPS reduction rates to varying degrees (TN: 23.36%~30.72%; TP: 27.19%~39.86%). The relationships between buffer areas and NPS reduction rate of each scenario were fitted well by the logarithmic function (P<0.05). The strategy with restoring the sub-basins of prior riparian buffer restoration, which integrated NPS loading and riparian buffers conditions, could reach the best benefit-cost index (1.19%).
赵鹏, 胡艳芳, 林峻宇. 不同河岸带修复策略对氮磷非点源污染的净化作用[J]. 中国环境科学, 2015, 35(7): 2160-2170.
ZHAO Peng, HU Yan-Fang, LIN Jun-Yu. Reduction rate of nitrogen and phosphorus non-point source pollution under different riparian buffer restoring strategies. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(7): 2160-2170.