论文部分内容阅读
黄河万家寨库区水体今年6月份再度受到污染。黄河中游水资源保护局监测结果表明:万家寨库区水质综合评价为劣于Ⅴ类,主要污染物质化学需氧量超标1.1倍、总磷超标4.0倍、非离子氨超标2.0倍、石油类超标0.8倍、锰超标3.0倍。其中污染严重的坝前断面左垂线库底上0.5m 处的样品,化学需氧量超标1.6倍、总磷超标45.2倍、石油类超标5.4倍、非离子氨超标3.5倍、镉超标1.2倍、锰超标41.2倍。库区水质、底质污染的程度依次为坝
Yellow River Wanjiazhai reservoir water again polluted in June this year. The monitoring results of Water Resources Protection Bureau in the middle reaches of the Yellow River show that the comprehensive evaluation of water quality of Wanjiazhai reservoir area is worse than Grade V, chemical oxygen demand of major pollutants exceeds 1.1 times, total phosphorus exceeds standard 4.0 times, non-ionic ammonia exceeds standard 2.0 times, Exceeded 0.8 times, exceeding 3.0 times of manganese. Among them, the samples with a pollution of 0.5m above the left vertical line in the front of the dam with a serious pollution exceeded the standards of COD by 1.6 times, TP by 45.2 times, petroleum by 5.4 times, non-ionic ammonia by 3.5 times and cadmium by 1.2 times , 41.2 times more than manganese. The water quality in the reservoir area and the degree of sediment pollution are in turn dam