Application of Water-table Fluctuation Method for Evaluation of Groundwater Recharge in Arid Region—an Example of Nalingguole River Alluvial-proluvial Fan in Qaidum Basin

Evaluation of groundwater recharge is one of the most important parts of the groundwater resources assessment in arid regions,the reliability of the groundwater resources assessment is low at many areas because of lacking of groundwater monitoring data or low degree of hydrogeological survey. Based on the groundwater level of long-term monitoring wells,the groundwater recharge quantity in Nalingguole River area was evaluated by using water-table fluctuation method,which just only needs aquifer parameters and groundwater level change values over a period of time. According to the results,the amount of groundwater recharge resources is 5. 21 × 108m3/ a in 2011 and 6. 16 × 108m3/ a in 2012 at study area. This method is relatively simple and avoids the direct calculation problem of groundwater resources items. It has certain reference significance at low study of hydrogeology of groundwater resources assessment in arid regions.