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1990年丰(枯)水期对颖河上、中、下游进行检测发现:河水生物性污染较严重,枯水期>丰水期;下游>中游>上游,整个水面均能检出大肠菌群,最低为2 300/L;最高23800/L。按照GB_(3838-38)第Ⅳ级地面水质标准判断,其中氨氮(NH~+_4÷N)超标(丰水期/枯水期)9.1倍/25.2倍;化学需氧量(COD)超标:未超/3.18倍;五日生化需氧量(BOD_2)超标0.46倍/13.47倍;亚硝酸盐氮(NO~(-2)-N)超标,
The upper and middle reaches and lower reaches of Ying River were detected in 1990 (Fengshui) period. The results showed that the biological contamination of river water was more serious, the dry season> wet season, the lower reaches> the middle reaches> the upper reaches, and the whole water surface could detect coliform bacteria with the lowest 2 300 / L; up to 23800 / L. According to GB_ (3838-38) Grade IV surface water quality standard, the ammonia nitrogen (NH_4 + N) exceeded 9.1 times / 25.2 times of the wet / dry period; COD was not exceeded /3.18times; BOD_2 exceeded 0.46 times / 13.47 times; Nitrite (NO ~ (-2) -N) exceeded the standard,