College of the Environment and Ecology, Xiamen University, Xiamen, 361102, People's Republic of China.
Anhui Provincial Environmental Science Research Institute, Hefei, 230000, People's Republic of China.
Environ Sci Pollut Res Int. 2021 May;28(18):23534-23546. doi: 10.1007/s11356-020-12274-x. Epub 2021 Jan 15.
At present, water pollution is still a serious problem in some parts of China. Clean water corridor technology (which provides water quality assurance and pollution load reduction from the Major Science and Technology Program for Water Pollution Control and Treatment) is a river pollution control and treatment measure. However, due to the differences of specific river conditions, it is not initially clear which technology can be used to obtain the best effect. Numerical simulation can address this issue. The results can be used as the basis for selecting clean water corridor technology. Combined with remote sensing (RS) and geographic information system (GIS) technology, the relationship between land use and non-point source pollution load was analyzed by using the HSPF (Hydrological Simulation Program-Fortran) model. According to the distribution of pollution load, the effect of the clear water corridor technology and its combination scenario on the reduction of non-point source pollution in the basin was simulated, and the best clear water corridor technology scheme for the control of non-point source pollution was identified. Research results show that from 2015 to 2018, the non-point source pollution load of total nitrogen in the Paihe River basin showed an overall increasing trend, while the total phosphorus showed a slightly increasing trend. Agricultural land and construction land accounted for 70% and 20%, respectively, of the non-point source pollution load, and the change in land use played an important role in the load of non-point source pollution. In terms of spatial distribution, the non-point source pollution of total nitrogen and total phosphorus was mainly concentrated in the downstream region and the central region. The non-point source pollution load reduction rates of total nitrogen and total phosphorus by the three types of clean water corridor technologies of vegetation buffer zones, permeable sidewalks and constructed wetlands, and their combinations were 15.29% and 15.03%, 11.93% and 11.48%, 8.96% and 8.67%, and 24.12% and 23.20%, respectively. It is necessary to comprehensively adopt clean water corridor technology for an optimal allocation and reasonable layout and to increase the pollution load reduction rate to further achieve ecological environment restoration goals.
目前，水污染仍是中国部分地区面临的一个严重问题。清洁水廊道技术（为中国水污染控制与治理重大科技专项提供水质保障和污染负荷削减）是一种河流污染控制和治理措施。然而，由于具体河道条件的差异，最初尚不清楚哪种技术可以获得最佳效果。数值模拟可以解决这个问题。结果可以作为选择清洁水廊道技术的依据。本研究结合遥感（RS）和地理信息系统（GIS）技术，利用 HSPF（水文模拟程序-Fortran）模型分析了土地利用与非点源污染负荷之间的关系。根据污染负荷的分布，模拟了清洁水廊道技术及其组合方案对流域非点源污染的削减效果，确定了控制非点源污染的最佳清洁水廊道技术方案。研究结果表明，2015-2018 年， paihe 河流域总氮非点源污染负荷呈整体增加趋势，总磷呈略增加趋势。农业用地和建设用地分别占非点源污染负荷的 70%和 20%，土地利用变化对非点源污染负荷起着重要作用。就空间分布而言，总氮和总磷的非点源污染主要集中在下游和中部地区。植被缓冲带、透水人行道和人工湿地三种类型的清洁水廊道技术及其组合对总氮和总磷的非点源污染负荷削减率分别为 15.29%和 15.03%、11.93%和 11.48%、8.96%和 8.67%、24.12%和 23.20%。有必要综合采用清洁水廊道技术进行优化配置和合理布局，提高污染负荷削减率，进一步实现生态环境修复目标。
