辽宁大伙房水库水质变化趋势研究

Study on Water Quality Trend For DaHuofang Reservoir

于1979-2003年调查了大伙房水库理化指标,对水质变化趋势进行了研究。入库和库区水体总氮、总磷含量多年平均分别为1.61mg·l-1和0.036mg·l-1;1.23mg·l-1和0.036mg·l-1,均超过国家地表入库Ⅲ和库区Ⅱ类水质标准。库区其他17项水化指标符合国家地表水库区Ⅱ类标准。大伙房水库水体只受到轻度污染,水质等级为近Ⅱ级,属浮游植物响应型中营养水体。

Via survey on physical and chemical index for Da Huofang reservoir during period of 1979-2003, the study on water quality trend was conducted, the results shows that average values of total nitrogen and total phosphorus at inlet and region of the reservoir stand 1.61 mg·l^-1, 0.036mg·l^-1 and 1.23 mg·l^-1, 0.036mg·l^-1 respectively, which is to say that water qualities have exceeded the standard （Ⅲ） on ground water flowing into reservoir and the standard （ Ⅱ ） on reservoir water body, however other seventeen chemical indexes with the exception of total nitrogen and total phosphorus satisfied the standard （Ⅱ） on reservoir water body, from monitoring data it couM be observed that water quality of Da Huofang reservoir fill within the water quality standard （Ⅱ） on reservoir water body, as an middle-eutrophicationed water body its polluted grade belong to mild-pollution grade.