GROUNDWATER RESOURCES AND ENVIRONMENT OF SOUTH CHANGSHAN ISLAND
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摘要:
通过对南长山岛地质、水文地质资料的系统分析和水文地质钻探、抽水试验、水文地球化学补充调查等工作，对岛上的地质、构造条件、水文地质条件和基岩裂隙水水环境特征有了进一步认识。南长山岛岛屿连绵起伏，地貌类型较为复杂，出露的地层主要有蓬莱群变质岩、第四系松散岩类等。岛上构造裂隙特别是张性断裂裂隙发育，构造裂隙水富水性较强；松散岩类孔隙水富水性较差。南长山岛基岩水的水化学类型主要为Cl-Ca、Na型，矿化度为202~704 mg/L，水质较好。海水入侵和人为污染是影响基岩水水质的主要因素。科学、合理开发海岛基岩水资源尤为重要。
Abstract:Through systematic studies of geology and hydrogeology of the Changshan Island with the data from hydrogeological drilling, pumping test and hydrogeochemical investigation, the regional geological and tectonic background, the hydrogeological conditions and the characteristics of groundwater environment for bedrock fissure water have been further recognized. The landform type of rolling South Changshan Island is complex. The exposed strata are mainly the Penglai group metamorphic rocks and Quaternary loose rocks and so on. Tectonic fractures, especially tensile fractures are widely developed on the island and the abundance of tectonic fracture water is high even the pore water in loose rocks is little. The hydrochemical types of bedrock groundwater at the South Changshan Island are mainly belonging to Cl-Ca, Na type, with a salinity ranging between 202mg/L-704 mg/L, Water quality is basically good. However, seawater intrusion and man-made pollution may bring negative impact to the quality of bedrock groundwater.
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