期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：227
期号：5
页码：052022
DOI：10.1088/1755-1315/227/5/052022
出版社：IOP Publishing
摘要：Ecological ditches have a good effect on improving polluted runoff, and their removal efficiency and construction length play a decisive role in the implementation of ditches. Based on the field monitored data of Wulihu River, the water quality was evaluated by the comprehensive index method. Then, the removal efficiency of nutrients in the ecological ditch was studied, and the optimum lengths of ecological ditch for main pollutant removal were obtained. The results showed that the water quality gradually became better along the Wulihu River and the removal efficiency of chemical oxygen demand was the largest (60.52%). The optimum ecological ditch length for total nitrogen removal was 6.05 km and that of nitrate nitrogen, nitrite nitrogen, chemical oxygen demand were 29.45 km, 5.61 km and 6.92 km, respectively.
