GroMoPo Metadata for Wadi Ham FEFLOW model

The control and management of seawater intrusion in coastal aquifers is a major challenge in the field of water resources management. Seawater intrusion is a major problem in the coastal aquifer of Wadi Ham, United Arab Emirates, caused by intensive groundwater abstraction from increased agricultural activities. This has caused the abandonment of salinized wells and ultimately affected farming activities and domestic water supply in the area. In this study, the 3D finite element groundwater flow and solute transport model is developed using FEFLOW to simulate pumping of brackish water from the intrusion zone to control seawater intrusion in the aquifer. The model was calibrated and validated with available records of groundwater levels and salinity distribution. Different simulation scenarios were conducted to obtain optimum pumping locations, rates as well as a number of wells. A comparison between scenarios of non-pumping and pumping of brackish water was conducted. Results showed an increase in the concentration of groundwater salinity under the non-pumping scenario, while it decreased under the pumping scenario. Under the non-pumping scenario, isoline 30,000 mgl(-1) was observed to have intruded into the south-eastern part of the aquifer, while the maximum isoline observed for the same area under the pumping scenario was 20,000 mgl(-1). This result showed an overall improvement in the quality of groundwater and ultimately halted seawater intrusion in the aquifer.

沿海含水层中海水入侵的控制与管理是水资源管理领域的一大挑战。在阿拉伯联合酋长国瓦迪哈姆沿海含水层，由于农业活动加剧导致的地下水过度开采，海水入侵成为了一个主要问题。这导致了盐碱化井的废弃，并最终影响了该地区的农业活动和居民用水供应。在本研究中，利用FEFLOW开发了三维有限元地下水流动和溶质迁移模型，以模拟从入侵区抽取咸水，从而控制含水层中的海水入侵。该模型通过与现有的地下水水位和盐度分布记录进行校准和验证。进行了不同的模拟情景，以获得最佳的抽水位置、抽水速率以及井的数量。对不抽水和抽咸水两种情景进行了比较。结果显示，在不抽水情景下，地下水盐度浓度有所增加，而在抽水情景下则有所下降。在不抽水情景下，观察到30,000 mgl(-1)等值线侵入含水层的东南部，而在抽水情景下，同一区域的最高等值线为20,000 mgl(-1)。这一结果表明，地下水质量整体得到改善，并最终成功阻止了含水层中的海水入侵。