摘要
对黄河水系 1 96 0年至 2 0 0 0年期间氮污染监测数据的分析表明 ,干流河水氮污染的程度自上游至下游有升高的趋势 ;不少支流氮污染的程度大大高于干流 .在工业不发达的农业地区 ,河水总氮与氨氮的最高浓度大多出现在丰水期 ;在工业相对发达的地区 ,河水氨氮与总氮的最高浓度大多出现在枯水期 ;有一部分站点河水总氮与氨氮浓度的年内变化无明显规则 .近 40年来黄河水系氮污染程度不断上升 ,1
A study has been carried out to analyze the monitoring data of nitrogen pollution of the Yellow river basin form 1960s to 2000s.The results indicate as follows:The contents of nitrogen in the Yellow river mainstream have a raising trend from the upper reaches to the lower reaches;The contents of nitrogen in many tributaries are much higher than that in mainstream;Seasonal variances of nitrogen content vary with watersheds and showed three kinds of variance;The nitrogen content of the river water showed an increasing trend during the recent 40 years,especially after 1990s.
出处
《环境化学》
CAS
CSCD
北大核心
2003年第2期105-109,共5页
Environmental Chemistry
基金
国家重点基础发展规划项目
批准号 :G1 9990 4 3 60 3
关键词
黄河
氮污染
污染特征
Yellow river,nitrogen contamination.
