水库蓄水初期水质分析及影响因素

对某大型水库蓄水初期水质空间分布进行了调查分析。设置了2个断面共5个采样点,进行每周1次共5次的跟踪监测。在库区淹没土壤类型调查和土壤浸出试验的基础上,根据库容曲线,计算土壤浸出物对水库水质的贡献值及单位面积土壤主要污染物的浸出量,并探讨土壤浸出对水库水质的影响趋势。结果表明:水库库区土壤养分在蓄水初期对水质有一定影响,这种影响随着水质的不断交换将逐渐减弱并达到新的动态平衡。

Water quality and its influencing factors analysis at initial stage of reservoir impoundment

The spatial distribution characteristics of water quality during the initial period of impoundment of a large reservoir were surveyed. Two cross-sections with five monitoring sites were set up in the large reservoir, and water quality was monitored once a week for a total of five weeks. On the basis of surveys of flooded soil type and leaching experiments of soil, and according to the storage-capacity curve, the contribution of leached substances to the reservoir water quality and the amount of the main leached pollutants per unit area were estimated. The trend of the influence of leached soil contaminants on water quality was also studied. The soil nutrients in the reservoir area had a certain impact on water quality in the initial period of impoundment. This impact decreased with continuous exchange of water quality and reached a new dynamic equilibrium.