山口岩水库是萍乡市极为重要饮用水水源地，但自2012年建成蓄水以来，已先后四次发生不同程度的锰含量超标现象，严重影响了区域供水安全。通过近五年来水逐月水质监测结果、逐日降雨量、逐日气温、逐日水位等相关数据，结合历次锰超标应急监测结果，结果表明：山口岩水库表层水体锰超标主要来源于坝址附近深处，少量来源于降水汇流的面源污染，低气温、低水位伴随降雪等极端天气很可能导致山口岩水库表层锰超标；水库水体锰超标初期常伴随着铁含量上升、溶解氧短时间内异常下降等特征。相关研究可为山口岩水库的锰超标污染问题防治与提供科学支撑。研究成果可为山口岩水库锰污染防控与饮用水安全保障提供科学依据。
Abstract
Shankouyan Reservoir is an extremely important source of drinking water in Pingxiang City. However, since its completion in 2012, it has experienced the manganese pollution four times, which has seriously affected regional water safety. This paper analyzes the classical monthly water quality data, and the corresponding daily rainfall, air temperature, water level over the past five years, combined with the typical emergency monitoring data of manganese pollution incidents. Results show that, the manganese pollution incidents of the reservoir surface water generally break out near the dam which comes from deep in the bottom, while a small amount of non-point source contributes through the regional rainfall-runoff. In particular, the reservoir manganese is more likely to be brought out by the low temperature, low water level and other extreme weather such as snowfall in the research area. Meanwhile, an obvious iron concentration rise, as well as the abnormal decline of dissolved oxygen often takes place during the above incident. This study can therefore provide essential scientific evidence for mitigating manganese pollution and securing drinking water in the reservoir.
关键词
锰污染；源解析；山口岩水库 /
水质监测
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Key words
manganese pollution /
source apportionment /
Shankouyan Reservoir /
water quality monitoring
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基金
国家自然科学基金;江西省水利厅科技项目;江西省水文局青年科技创新基金
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