南阳盆地地下水水质评价

南阳盆地处于秦岭地层区，区内断层活跃，第四纪地层分布广泛。通过水质资料分析，浅层地下水（小于30m）绝大部分受到轻度污染，少部分为中度污染或重度污染。浅层地下水30m以下一般都有粘性土层相隔，水质基本未受污染。为此应在全区建立地质环境监测网，对地下水位、水质、取水量及环境地质现象进行长期监测，以便及时准确地了解地下水环境动态资料。对区内高污染企业应进行适度的治理，争取对环境排放的污染物能最大程度的达标。

Evaluation of Groundwater Quality in the Nanyang Basin

The Nanyang Basin is located in the stratum area of Qinling. The fault is activity and the fourth quaternary period is distributed extensively in the area. The article is based on the data analysis and the shallow groundwater （less than 30m） is polluted slightly at most and few at middle or serious pollution. Under 30m of the shallow groundwater, there is a interlayer of the cohesive soil and the water quality isn＇t polluted. Therefore the geology environmental monitoring net should be established in the whole area, the groundwater level, water quality, the adopted volume and environment and geology phenomenon can be monitored for a long time, so that we can get the exact dynamic data of the groundwater environment. The suitable control method should be carried out for the enterprises with characters of high pollution, try to manage the contamination well at most possible.