论文部分内容阅读
目的:了解该地区深层地下水质变化情况。方法:对1995年和2010年丰水期水质调查资料,按照GB/T14848-93《地下水质量标准》分别进行统计、分析和比较。结果:1995年该地区地下水质符合“优良”(Ⅰ类)一级水源(F<0.80),到2010年水质变为“较好”(Ⅰ类)三级水源(F>2.50)。结论:15年来该地区地下水污染严重,污染源主要是农业化肥和人畜排泄物,污染途径主要是废弃的深井和雨水渗透,预测到2020年后,该地区地下水将不可以作为直接集中式生活饮用水供水水源。
Purpose: To understand the changes in deep groundwater quality in the area. Methods: The data of water quality survey during 1995 and 2010 were collected, analyzed and compared according to GB / T14848-93 “Groundwater Quality Standards” respectively. Results: In 1995, the groundwater quality in this area was in line with the “good” (Class Ⅰ) primary water source (F <0.80) and the water quality in 2010 was changed to “better” (Class Ⅰ) tertiary water source (F> 2.50 ). Conclusion: In the past 15 years, the groundwater in this area is seriously polluted. The sources of pollution are mainly agricultural fertilizers and human and livestock excrement. The main pollution sources are abandoned deep wells and rainwater infiltration. It is predicted that groundwater in the area will not be used as direct centralized drinking water after 2020 Water supply.