The relationship between flow direction of groundwater and tidal fluctuation through surveying water table during an ebb tide and flood tide of 26 geologic wells was deduced.

• 其次，通过调查设置在区域内的26口调查井在满潮和干潮时的地下水位，推断出了潮汐的涨落及感潮河流和地下水流动方向的关系。