水库蓄水初期淹没土壤污染物释放规律研究

Research of Pollutants Released from Submerged Soil during Initial Period of Reservoir Storage

为了研究水库蓄水初期氮磷污染物的释放规律,以待建的桐梓水库为例,选择库区土壤分别进行振荡和静置水体的土壤污染物浸泡提取试验。结果表明,水体振荡条件能明显加快浸泡土壤污染物的释放速率;水土比越大,氮污染物浸出总量越多;土壤中的污染物在蓄水初期释放较多,因此水库蓄水初期的水质是关注的重点。

In order to study the regular of pollutants released from submerged soils during the initial period of reser- voir storage, Tongzi reservoir, which has been planning to be built, was used as the study object and the soil samples were taken from different sites of Tongzi reservoir. The extraction experiments of soil pollutant soaking were carried out for disturbance and static water body. Compared with the static water body, the results show that the pollutant release was faster at the disturbance condition. The larger the water and soil ratio is, the more the pollutant TN releases. In ini- tial period of reservoir storage, the more soil pollutants soil would be released. Thus, it should be paid attention to water quality during the initial period of reservoir storage.