Vulnerable areas (less than 5-feet GWD) with 8-feet of SLR

Groundwater modeling was used to simulate the effects of sea-level rise on groundwater levels in the New Hampshire Seacoast. The MODFLOW-USG Transport model (Panday, 2022) was used to simulate groundwater flow and saltwater intrusion in these communities. This map shows vulnerable areas where the groundwater depth is currently less than 5 ft. The colors show the projected magnitude of groundwater rise under 8 ft of sea-level rise. Shallow and surface infrastructure, including pavements in these areas, is the most vulnerable to rising groundwater from sea-level rise and from heavy rainfall events.本研究采用地下水数值模拟方法，模拟海平面上升对新罕布什尔州海岸带地下水位的影响。本次模拟选用MODFLOW-USG 溶质运移模型（MODFLOW-USG Transport model，Panday, 2022），对该区域沿海社区的地下水流动与盐水入侵过程开展数值模拟。本地图展示了当前地下埋深小于5英尺的易受影响区域，图中色彩代表海平面上升8英尺时地下水位上升幅度的预测结果。该区域内的浅层与地表基础设施（包括路面）最易受到海平面上升与强降雨事件引发的地下水位上升的影响。