摘要
本文讨论我国东部河水的重要理化指标、化学稳定性、酸和碱的缓冲容量及区域分异特征,并分析影响河水水质的地球化学因素。
In the eastern part of China, the average pH in the river water mainly-connected with bicarbonate, is 6.7-3.', Due to different contents of total salt, the river water is divided into 4 regions. 1, In the lowest-content legion, the total salt is<100mg/l. 2.In the second lowest-content region, the total salt is 100-200mg/l; 3,In the middle-level content region,the total salt is 200-500mg/l; 4, In the high content region, a very small area,the total salt is 500-1000mg/l. Most of the river waters are soft water with the hardness<8(German), but the water hardness in the Yellow River and in the Hai River is as high as 8-16. Due to different contents of COD, the river water is divided into 3 regions. 1, At the northern part of Northeast China, COD content in rivers is rather high; COD≥1img/1,2. From the southern part of Northeast China to the Yantze River,which is a transitional area, COD content in rivers is 2-4mg/1, 3. To the south of the Yantze River, COD content is comparatively low. COD≤1-2mg/l. Moreover the alkali capacity is rather low in most river water, i.e. <1.0m.e/l; while the acid capacity is rather high, i,e>1.0m,e/l. And in the eastern part of China, most river water is dissolution-erosional.
出处
《地理研究》
CSSCI
CSCD
北大核心
1990年第2期67-75,共9页
Geographical Research
关键词
河水
化学地理特征
河流
geochemical characteristics, river system,East China
