Simulation of groundwater dynamic conditions in the Baiquan spring region under optimal groundwater resource allocation

Abstract

Xingtai, once been famous city for its spring groups in history, has become one of the regions in the country where water resources are in high demand due to long-term over-exploitation in groundwater resource. In the region where the springs in the area have dried up and been cutting-off over the years, including Baiquan and Dahuo. In order to allocate the amount of water diverted from the Middle Section of South-North Water Diversion Project reasonably, to effectively make the springs re-rushing and restore the groundwater level, this research established a numerical groundwater model based on the hydrogeological conditions of the study area. The calculate model is used to discuss the hydrodynamical patterns changes and predict the flowrate of spring groups under different allocation of supplement diversion schemes quantifiably. It was found that the scheme of using the amount of river diversion to rehabilitate the Xingtai urban funnel was most conducive to the recovery of groundwater levels in the spring groups, which is due to the reduction in groundwater extraction has reduced the influence range of the urban funnel and improved the hydrodynamic conditions in the northern preferential runoff zone. The results have demonstrated the feasibility of re-rushing the spring groups. HIGHLIGHTS The hydrogeological model based on the groundwater unit in the Baiquan spring area was established in this study.; The model was verified to have high accuracy through fitting and can be used for the analysis of groundwater dynamic conditions.; This article discusses the variation of groundwater waterhead under different artificial recharge and allocation schemes.;

Keywords

• karst spring re-rush
• karst hydrogeological simulation model
• water resource allocation
• ordovician limestone aquifer