A11E-0094
A new approach for estimating groundwater table fluctuation response to rainfall events in North China Plain

Monday, 14 December 2015
Poster Hall (Moscone South)
Zilong Liao, Xinmin Xie and Zhenzhen Ma, IWHR Institute of Water Resources and Hydropower Research, CAS, Beijing, China
Abstract:
A rise or decline in water table in response to water budget is a function of rainfall volume and groundwater depletion intensity. Most research have focus on estimating water table fluctuations among various shallow aquifer resulting from recharge and discharge change, however, the methods commonly applied are limited in that the subsurface system is more complex. In this paper, a reliable approach based on statistics theory is presented for quantifying the correlation relationship among water table, rainfall events and groundwater depletion process. The detail monitoring data are used to multivariate regression analysis and established the relationship model between water table and groundwater depletion in the proposed method. We further employed the model to obtain water table fluctuation trend with manual controlled depletion in different rainfall conditions. We also identify how this model applied to North China Plain and examine the water table error. The results show that controlling the depletion process based on different rainfall frequency can promote groundwater table recover and the model can provide a reliable method to groundwater management.