Groundwater Depth less than 10-feet (No SLR)

Groundwater modeling was used to simulate the effects of sea-level rise on groundwater levels in the New Hampshire Seacoast. The calibrated MODFLOW-USG Transport model (Panday, 2022) was used to simulate groundwater elevations under current sea levels and under various sea-level rise scenarios. Groundwater depth without SLR was estimated by subtracting the current groundwater levels from LiDAR ground surface elevations. Groundwater depths of less than 15 ft, 10 ft, and 5 ft were mapped for the current conditions. Groundwater depth for the various SLR scenarios can be estimated by subtracting the simulated SLR-induced groundwater rise from the current groundwater depth.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水位的影响。本研究使用经率定的MODFLOW-USG传输模型（MODFLOW-USG Transport，Panday, 2022），模拟当前海平面及多种海平面上升情景下的地下水水位高程。无海平面上升情景下的地下水埋深，可通过LiDAR获取的地表高程减去当前地下水水位计算得到。针对当前情景，研究绘制了地下水埋深分别小于15英尺、10英尺及5英尺的空间分布图。针对各类海平面上升情景，可通过当前地下水埋深减去模型模拟得到的、由海平面上升引发的地下水抬升量，估算得到对应情景下的地下水埋深。