QI Xiaofan1,2, LI Wenpeng3, YANG Lizhi2, SHANG Hao2, YI Fei2
(1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;
2.Shandong Institute of Geological Survey, Jinan, Shandong 250013, China;
3.Center for Hydrogeology and Environmental Geology Survey, CGS, Baoding, Hebei 071051, China)
Abstract: Based on groundwater level anomalies and precipitation anomaly at four carbonate rock-fissure karst groundwater monitoring points and three loose rock-pore groundwater monitoring points within and to the north of the springs water shed, this paper analyzes relationships between groundwater level and precipitation in Jinan Baiquan springs water shed using methods of correlation analysis and cross wavelet analysis. Conclusions are drawn as follows. Firstly, the lags of groundwater anomalies to precipitation anomaly can be briefly described by correlation analysis; secondly, cross wavelet analysis of whole time shows that the lags of karst groundwater anomalies to precipitation anomaly are 101.41~141.56 d, while the lags of pore water are 114.14~185.37 d. The lags are relatively long because of their locations. General trend of karst groundwater anomalies is that the longer the groundwater runoff path, the longer the groundwater level anomalies lag will be; and thirdly, the lags of rich precipitation period of karst groundwater anomalies to precipitation anomaly are 80.80~118.31 d, while the lags of pore water are 128.59~167.52 d. It indicates that annual precipitation and precipitation combination forms have influence on groundwater level anomalies, and groundwater level anomalies respond faster when the precipitation is greater. The quantitative description of groundwater level response to precipitation can help building groundwater level forecast models, which is meaningful to groundwater protection and reasonable development and utilization.
Keyword: groundwater level anomaly; precipitation anomaly; wavelet analysis; multiple scale analysis; periodicity
EARTH AND ENVIRONMENT Vol. 43, No.6, Tot No.308, 2015, Page 619-627
