Vulnerable areas (less than 5-feet GWD) with 1-foot 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 1 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.本研究采用地下水建模方法，模拟海平面上升对新罕布什尔州海岸带（New Hampshire Seacoast）地下水位的影响。本次模拟选用MODFLOW-USG 溶质运移模型（MODFLOW-USG Transport，Panday，2022），以刻画该区域的地下水流动与海水入侵过程。本幅地图展示了当前地下埋深不足5英尺的脆弱区域，图中色彩表征了海平面上升1英尺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（包括路面）最易受到海平面上升及强降雨事件引发的地下水位抬升的不利影响。