含感潮河流的海岸带海水入侵特性的调查研究  

Study on characteristics of coastal seawater encroachment with tidal river

作　　者：唐心强[1] 左风华[2] 吴守林[1] 大年邦雄[3] 

机构地区：[1]泰山医学院化学与化学工程学院,山东泰安271016 [2]泰山医学院信息工程学院,山东泰安271016 [3]高知大学农学部

出　　处：《海洋环境科学》2010年第1期44-50,共7页Marine Environmental Science

摘　　要：以太平洋附近3.2 km2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。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 characteristies of impervious layer to give qualitative explanation for the results showed above.

关 键 词：地下水 潮汐 海水入侵 咸淡水界面 

分 类 号：P641.2[天文地球—地质矿产勘探] P731.23[天文地球—地质学]