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流域闸坝群对河流水文水环境的影响是目前变化环境下流域水循环研究中的热点和难点之一。论文从流域尺度上探讨了温榆河流域闸坝群对水文循环和污染物运移的作用,分析了闸坝群对温榆河干流水量和水质浓度的影响。研究表明:①闸坝群调蓄降低了温榆河的径流量,削减洪峰,调节非汛期径流,源头的水库对径流调蓄强,削峰显著,而中下游地区的闸坝对径流调蓄较弱,对汛期洪峰有削减作用,但增加了非汛期径流量;②对于河流水环境影响,源头水库库容大,纳污能力强,有助于降低坝上水质浓度,但在水库坝下以及中下游地区水闸,闸坝切断河流,降低河流流通性,水质浓度提高。研究将为认识温榆河流域水污染成因提供依据,同时也为流域水污染整治和水资源高效利用提供技术支撑。
The impact of the dam group on the hydrology and water environment of the river basin is one of the hot spots and the difficult point in the research on the water cycle in the basin under the changing environment. The paper discusses the effect of the dam group on the hydrological cycle and pollutant transport from the basin scale and analyzes the effect of the dam group on the water quantity and water quality of the Wenyu River main stream. The research shows that: (1) sluice dam storage reduces the runoff of Wenyu River, reduces the flood peak, and adjusts the runoff in non-flood season; the reservoirs in the source area have strong regulation of runoff and significant peak clipping; while sluice regulation and storage in the middle and lower reaches of the dam are weak , Which can reduce the flood peak but increase the non-flood season runoff. (2) For the impact of river water environment, the source reservoir has a large storage capacity and strong pollutant holding capacity, which helps to reduce the water quality on the dam. However, under the reservoir dam and in the middle and lower reaches Regional sluices, sluices cut off the river, reducing river circulation, water quality increased. The research will provide the basis for understanding the causes of water pollution in Wenyu River Basin, and also provide technical support for water pollution remediation and efficient utilization of water resources in the basin.