摘要
研究认为东部浅层地下水的污染比较严重，硝酸盐超标率达到了88％；在靠近湖滨平原区地下水硝酸盐为中等污染，其超标率在（30．77～66．67）％之间。时间上，研究区随着土地利用的变化，地下水硝酸盐污染在最近几年在逐渐趋向减轻。
According to the study, the pollution of shallow underground water is serious in the east part, with nitrate excess rate 88%. The nitrate pollution of underground water is medium in the plain area near the lake shore, with the excess rate 30. 77 - 66.67%. The nitrate pollution of undergeround water has progressively decreased in recent years because of the change in land usage.
出处
《云南地质》
2009年第4期437-444,共8页
Yunnan Geology
关键词
硝酸盐污染
时空分布
变化规律
昆明盆地北部
Nitrate Pollution
Distribution in Time and Space
Change Rule
North Kunming Basin
