密云水库水源保护区不同特征植被对产流水质影响研究

Impacts of different vegetation types on runoff water quality in Miyun Reservoir water source protection zones

通过对密云水库水源保护区上游和消落区不同特征植被降雨产流后水质的化验分析,比较其优劣。表明:森林植被覆盖率高,人为活动干扰少的水质优良,反之水质就较差;消落区种草区产流水质优良,农业种植区水质最差,各项指标都超出饮用水标准。由此得出不同特征植被的产流水质与森林覆盖率有一定的正相关性,人为活动也对水质有较大影响。同时对如何更好地保持密云水库水质提出了合理化建议。

By studying the runoff water quality of different vegetation types in upper reaches of Miyun reservoir water source protection zones and the drawdown area, this paper analyzed the difference of runoff water quality in different vegetation types and the influencing factors. Studies showed that the runoff water quality in highly vegetated and less human disturbance area is pretty good, and vice versa. In drawdown area, the runoff water quality in grassland is much better than cultivated area where the water quality worse than the drinking water standards. The result showed a certain positive correlation between vegetation coverage and runoff water quality, human activities have significant impact on water quality. Some suggestions on maintaining the water quality in Miyun Reservoir were given.