Vulnerable areas (less than 10-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 10 ft. The colors show the projected magnitude of groundwater rise under 4 ft of sea-level rise. Subsurface infrastructure assets, including utilities, are the most vulnerable to rising groundwater from sea-level rise and heavy rainfall events in these areas.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。本次模拟采用MODFLOW-USG传输模型（MODFLOW-USG Transport model，Panday，2022），对该区域的地下水流动与盐水入侵过程进行模拟。本地图展示了当前地下水位埋深小于10英尺的脆弱区域。图中色彩分级代表了海平面上升4英尺情景下，地下水位抬升的预估幅度。该区域内的地下基础设施资产（包括市政公用设施），最易受到海平面上升与强降雨事件引发的地下水位上升影响。