CAJ | 학술논문

以太平洋附近3.2 km~2的区域为调查对象.首先,通过区域内的19口地质调查井,确认了含水层由透水性不同的多层土质构成,含水层以下的不透水层总体上从海岸开始呈逐渐隆起的山丘状.其次,通过测量距海岸不同距离的10口井水铅直方向电导率,确认了咸淡水混合区域特征点和地下水面伴随着潮汐的波动而变化的规律.即,在同一位置不同季节,其变化的特征不同;同一季节不同位置的调查井,因所处位置的地质构造及与海岸、感潮河流距离的不同,其变化特征也不同,这与迄今为止的众多研究结果不同.此外,通过分布于区域内的36个电法探测点的探查和井水铅直方向电导率的调查认为,海水入侵虽然受到感潮河流的一定影响,但从整个调查区域来看海水仍以"楔状"向着内陆入侵.同时,针对调查区域的不透水层的特征建立的数理模型对以上的部分调查结果给出了定性解释.
이태평양부근3.2 km~2적구역위조사대상.수선,통과구역내적19구지질조사정,학인료함수층유투수성불동적다층토질구성,함수층이하적불투수층총체상종해안개시정축점륭기적산구상.기차,통과측량거해안불동거리적10구정수연직방향전도솔,학인료함담수혼합구역특정점화지하수면반수착조석적파동이변화적규률.즉,재동일위치불동계절,기변화적특정불동;동일계절불동위치적조사정,인소처위치적지질구조급여해안、감조하류거리적불동,기변화특정야불동,저여흘금위지적음다연구결과불동.차외,통과분포우구역내적36개전법탐측점적탐사화정수연직방향전도솔적조사인위,해수입침수연수도감조하류적일정영향,단종정개조사구역래간해수잉이"설상"향착내륙입침.동시,침대조사구역적불투수층적특정건립적수리모형대이상적부분조사결과급출료정성해석.
The region area studied covers 3.2 km~2 nearby the Pacific.First,it was proved that the aquifer in investigation area is composed of multiple layer soil with different permeability and there are uneven impervious layer under the aquifer through surveying of 19 geologic wells.Second,the regularities of groundwater level and feature points of salt-fresh water mixing region changing with tidal fluctuation were investigated through water vertical conductivity of 10 wells which have different distance away from the coast,i.e.,the characteristics are different in different seasons at the same place.While the variation regularity would be different for different places in the same season because the geologic structure of the wells and the distances from seacoast and tidal river are different.It was greatly different to the common rules accepted by the human being to date.Moreover,the conclusion was obtained through surveying 36 electrical detecting points and vertical conductivity of well water that although the tidal river effects on the seawater encroachment,the seawater encroaches toward inland in wedge-shaped from the whole surveying region.A mathematical model was built according to the characteristics of impervious layer to give qualitative explanation for the results showed above.