滨海带感潮河流上朔规律及地下水面波动特征研究

本研究以太平洋附近具有典型海岸地形地貌的3.2km2的区域为调查研究对象。首先,通过调查设置在河流上的5处调查点的河流水位及河水铅直方向电导率,掌握了感潮河流海水上朔的规律。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。此外,对与海岸垂直的断面和平行的断面上的10口调查井的调查结果显示,同一位置、不同季节其地下水面波动的特点不同;不同的调查井,因所处位置的不同及与海岸、感潮河流距离的不同,其地下水面波动的振幅及其与潮汐波动的位相差也不同。

Seawater Encroachment of Tidal River in Coastal Areas and Fluctuation of Its Water Table

This paper is based on the region area of 3.2km2 with typical coastal landform nearby the Pacific.It proves regularities of seawater encroachment of tidal river through surveying river levels and water vertical conductivity of five surveying points in river.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.Moreover,the results of surveying 10 wells in the parallel and vertical sections to coast showed that the characteristics of fluctuation of water level are different in different seasons,vibration amplitude and phase difference between fluctuation of water level and tide would be different because the distance away from coast and tidal river are different for wells in different positions.