第二松花江水体中氮含量的动态变化分析

详细地分析了第二松花江水体中硝态氮，亚硝态氮和氨氮在不同江段，不同水期，不同年际的时空变化规律。结果表明，氮在水中的含量变化与入江城市污水及沿江两岸地表径流水中的氮有直接关系，硝态氮和亚硝态氮在丰水期水中的含量高于枯、平水期、丰水期水中的硝态氮随江段的延长而增高，氮氮在污染江段的含量高于非污染江段。３个水期水中硝态氮和亚硝态氮的含量年际变化显示为１９８５￣１９８９年略高于１９８０￣１９８４年和１９

Nitrogen Content Dynamic Variation Analysis in the Second Songhua River

Space time variation law of nitrogen content in different river sections, water periods and years in the second Songhua River were described in detail. The results showed that there are direct relation between nitrogen content variation in water and nitrogen in waste water to come from cities and runoff water of both banks of the river. Nitrate and nitrite contents in water in flood period are higher than that of mid and low water periods. In flood period, nitrate content in water increases gradually with extension of river section, ammonia content in polluted river section is higher than that of unpolluted river section. Nitrate and nitrite contents in water in three water periods from 1985 to 1989 are slightly higher than that from 1980 to 1984 and from 1990 to 1994,ammonia content in water increased annually.