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| Research on effects of the aquifer roof buried depth on water quality——Take Yancheng III porous confined aquifer for example |
| MA Jun-ting1,3, CHEN Suo-zhong1,2, LIU Huan1, ZHANG Jun-ru1 |
1. Key Laboratory of Virtual Geographical Environment, Ministry of Education, Nanjing Normal University, Nanjing 210023, China;
2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China;
3. Jiangsu Yearning Construction CO., LTD, Nanjing 210000, China |
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Abstract Based on internal hydrogeological borehole data in hydrogeological division of Yancheng Coastal Plain and water quality factor monitoring data during 2005~2014, Geographic information science (GIS) and Analysis of Variance (ANOVA) method etc. were applied to research response characteristics of aquifer roof depth changes in time-space dimension for the quality of porous groundwater of confined aquifer III in experiment sample area, the dynamic evolution laws of groundwater quality and propose suggestions on groundwater management and protection in the research area were analyzed. The research result showed that the depth of confined aquifer III in this area mostly went between -118.9m~-85.45meter. Due to hydrogeological conditions of groundwater with different depths and exploitation and utilization differences, there was some correlation between typical water quality factor of groundwater and aquifer depth. Mineralization, total alkalinity and total bacterial count had the strongest correlation strength with the depth (relevancy: 69.67%, 75.76% and 58.09%). The strength of total hardness was at an intermediate level (49.18%). KMnO4 index was little affected by the depth (35.27%). It is also found that the correlation strengths between factors and depth in various depth classification areas were significantly different, indicating different dynamic evolution characteristics.
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Received: 15 February 2016
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