Development and research status of numerical simulation on the groundwater of bedrock islands
WANG Daqing1, XU Haoli1, DENG Zhengdong1, DING Zhibin1, NI Borui1, ZHOU Zelin2, ZHAO Xiaolan1
1. Defense Engineering College, Army Engineering University, Nanjing 210007, China; 2. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
Abstract：Bedrock islands account for more than 90% of China’s islands, and the fresh water resources on the islands are very precious. Currently, the islands’ water supply (shipping, rainwater collection, seawater desalination, etc.) has disadvantages of high costs and the equipment on the islands damages easily. Therefore, the islands’ groundwater resources are undoubtedly high-quality, reliable and stable water supply. In order to better develop the groundwater resources of bedrock islands, the authors reviewed the groundwater simulation of bedrock islands from the aspects of groundwater theory, groundwater simulation research status at home and abroad, simulation model and so on. It was concluded that the groundwater in bedrock islands is mostly stored in the form of “fresh water mushroom body”, which is different from sandy islands. The simulation model should be generalized as transverse isotropic darcy flow or non-darcy flow, or a coupling model of these two models, and its corresponding motion equation of groundwater flow was concluded. The groundwater simulation model of bedrock islands can be divided into three types: pore type, fissure type and pore-fissure type. In the setting of island boundary, bedrock coast should be set as confining boundary and sandy coast as constant head boundary. This review shows that researches on groundwater simulation of bedrock islands should be as refined and complete as possible, to accurately depict the geology and landform of bedrock islands and set a complete complement for island drainage. During the simulation, the groundwater types of bedrock islands should be exactly matched with the simulation methods and software. Model verification is also very important, which needs to be compared with island water balance, measured water amount and water level for many times, and the model needs to be improved constantly. The above achievements could provide theoretical basis for the groundwater numerical simulation of bedrock islands.
王大庆, 许颢砾, 邓正栋, 丁志斌, 倪博睿, 周泽林, 赵小兰. 基岩岛屿地下水数值模拟发展研究现状[J]. 中国地质调查, 2019, 6(3): 68-74.
WANG Daqing, XU Haoli, DENG Zhengdong, DING Zhibin, NI Borui, ZHOU Zelin, ZHAO Xiaolan. Development and research status of numerical simulation on the groundwater of bedrock islands. , 2019, 6(3): 68-74.
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2019, Vol. 6 
