College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.
College of Environment and Biology, Nanjing Forestry University, Nanjing 210037, China.
Int J Environ Res Public Health. 2022 Sep 29;19(19):12453. doi: 10.3390/ijerph191912453.
Urban river pollution is considered a 'necessary evil' consequence of disproportionate developmental expansion in metropolises. Unprecedented expansion and anthropic activities lead to the deterioration of urban rivers with municipal and industrial sewage. The construction of sluices is one of the irrefutable parts of the process. In order to prevent floods and drought, many cities build sluices and dams in rivers to balance water quantity in different seasons. To explore the change characteristics of the water quality in urban rivers after the construction of sluices and dams, the change in the total phosphorus (TP) and total nitrogen (TN) concentrations upstream and downstream of rivers was investigated under the condition of sluices closure in Wuxi. According to the results, when the sluices were closed, the pollutants of TP and TN would accumulate upstream in rivers, which caused the water quality in the upper reaches to be worse than that in the lower reaches. Specifically, the TN and TP concentrations downstream of urban rivers in Wuxi were approximately 14.42% and 13.80% lower than those upstream when the sluices were closed. Additionally, the water quality in urban rivers was usually better in summer and autumn than in the other seasons, showing obvious seasonality after the construction of the sluices. The research will provide a theoretical basis for future sluice operation and the water resources management of urban rivers.
城市河流污染被认为是大都市发展扩张不成比例的“必然之恶”。前所未有的扩张和人为活动导致城市河流受到市政和工业污水的恶化。水闸的建设是不可避免的一部分。为了防止洪水和干旱，许多城市在河流上建造水闸和堤坝，以平衡不同季节的水量。为了探讨水闸建设后城市河流水质的变化特征，在无锡水闸关闭的情况下，研究了河流上下游总磷（TP）和总氮（TN）浓度的变化。结果表明，水闸关闭时，TP 和 TN 等污染物会在上游河流中积累，导致上游水质比下游差。具体来说，当水闸关闭时，无锡城市河流下游的 TN 和 TP 浓度比上游低约 14.42%和 13.80%。此外，水闸建成后，城市河流的水质通常在夏季和秋季较好，呈现出明显的季节性。该研究将为未来水闸运行和城市河流水资源管理提供理论依据。
Zotero 插件
