面对不断变化的气候条件,可持续管理自然水资源和粮食安全对沿海社区的生计至关重要。不断增加的洪水和盐水入侵(SWI)可能会对农业生产和相关的海滩旅游通道产生不利影响。本研究使用综合地表水模型来引入一种新的SWI阻滞方法,该方法包括使用沿海土地复垦(CLR)沿现有海岸线放置含水层填充材料。建模结果表明,人工含水层材料可以通过增加沿海降水的入渗面积来降低SWI。从集水区收集径流,并使用处理过的废水或淡化的微咸水-利用沿海波浪能降低水处理成本。SEAWAT模型被用来验证它是否正确解决了亨利的问题,然后应用于比斯坎湾含水层,佛罗里达,美国。在这项研究中,为了更好地告知沿海含水层管理(CAM),我们开发了四个建模场景,即,物理表面屏障(PSB),包括人工含水层宽度,渗透性,和斜坡和补给。在没有人工含水层放置的基本情况下,结果表明,海水水平会增加含水层的盐度,并取代大量现有的新鲜地下水。更具体地说,比斯坎湾含水层,大约0.50%的可用新鲜地下水将丢失(也就是说,考虑到海水水位的增加,每公里含水层宽度41,192m3)。此外,结果表明,在大约615m的宽度上放置具有每天<100m的较小渗透率的PSB含水层,每公里海岸线的可用新鲜地下水增加了大约45.20%和43.90%,分别。同样,减少含水层-海洋侧的坡度并增加含水层的补给将使每公里含水层的淡水可利用性增加约43.90%和44.50%。最后,通过增加农业生产和可能的旅游业来抵消填充位置和水处理成本,在浅层海岸线上放置含水层填充物会增加沿海社区的净收入。这项研究通过延迟含水层盐度对沿海地区的综合管理很有用,保护新鲜的地下水体,增加农业用地,通过收集降雨和山洪来支持地表水供应,利用波浪能淡化盐水。此外,这项研究实现了淡水储存的可行性和CAM的成本。
Sustainable management of natural water resources and food security in the face of changing climate conditions is critical to the livelihood of coastal communities. Increasing inundation and saltwater intrusion (SWI) will likely adversely affect agricultural production and the associated beach access for tourism. This study uses an integrated surface-ground water model to introduce a new approach for retardation of SWI that consists of placing aquifer fill materials along the existing shoreline using Coastal Land Reclamation (CLR). The modeling results suggest that the artificial aquifer materials could be designed to decrease SWI by increasing the infiltration area of coastal precipitation, collecting runoffs from the catchment area, and applying treated wastewater or desalinated brackish water-using coastal wave energy to reduce water treatment costs. The
SEAWAT model was applied to verify that it correctly addressed Henry\'s problem and then applied to the Biscayne aquifer, Florida, USA. In this study, to better inform Coastal Aquifer Management (CAM), we developed four modeling scenarios, namely, Physical Surface Barriers (PSB), including the artificial aquifer widths, permeability, and side slopes and recharge. In the base case scenario without artificial aquifer placement, results show that seawater levels would increase aquifer salinity and displace large amounts of presently available fresh groundwater. More specifically, for the Biscayne aquifer, approximately 0.50% of available fresh groundwater will be lost (that is, 41,192 m3) per km of the width of the aquifer considering the increasing seawater level. Furthermore, the results suggest that placing the PSB aquifer with a smaller permeability of <100 m per day at a width of approximately 615 m increases the available fresh groundwater by approximately 45.20 and 43.90% per km of shoreline, respectively. Similarly, decreasing the slope on the aquifer-ocean side and increasing the aquifer recharge will increase freshwater availability by about 43.90 and 44.50% per km of the aquifer. Finally, placing an aquifer fill along the shallow shoreline increases net revenues to the coastal community through increased agricultural production and possibly tourism that offset fill placement and water treatment costs. This study is useful for integrated management of coastal zones by delaying aquifer salinity, protecting fresh groundwater bodies, increasing agricultural lands, supporting surface water supplies by harvesting rainfall and flash flooding, and desalinating saline water using wave energy. Also, the feasibility of freshwater storage and costs for CAM is achieved in this study.