Vulnerable areas (less than 5-feet GWD) with 4-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 4 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.本研究采用地下水模拟方法，模拟海平面上升对新罕布什尔州海岸（New Hampshire Seacoast）区域地下水位的影响。本研究使用MODFLOW-USG输运模型（MODFLOW-USG Transport model，Panday, 2022），模拟该区域的地下水流动与海水入侵过程。本地图展示了当前地下水位埋深小于5英尺（ft）的脆弱区域。图中色彩用于表征在海平面上升4英尺（ft）的情景下，地下水位抬升的预测幅度。该区域内的浅层与地表基础设施（含路面）最易受到海平面上升及强降雨事件引发的地下水位上升的影响。