摘要
实测了厦门岛沿岸地区地下水的氢、氧稳定同位素组成 ,并据此开展了沿岸地下水水文学的同位素示踪研究。对地下水、海水及大气降水的δD～δ18O方程进行数理分析后表明 ,大气降水是厦门沿海浅层地下水的主要来源。利用稳定同位素质量平衡模型 ,估算9810号台风所致降水对地下水的贡献。结合水文资料 ,通过地下水氢、氧同位素组成的时空分布特征 ,验证了地下水由北向南运移并最终排入沿岸海域的运移途径。研究还初步探讨了地下水稳定同位素组成对潮汐变化的响应。
Hydrogen and oxygen stable isotopic investigation of surface groundwater and seawater samples from coastal area of Xiamen Island were undertaken to characterize the isotopic nature and to hold the study of stable isotopic hydrology of coastal groundwater.TheδD～δ 18 O relationship of different water were compared by using mathematical statistics methods,which shows that the meteoric water is the main source of shallow groundwater of Xiamen Island.Using a stable isotopic massˉbalance equation,we estimated the relative contribution of a big precipitation event brought by No.9810typhoon to the hydrologic budget of groundwater.The characteristics of temporal and spatial distributions of 2 H and 18 O in coastal groundˉwater revealed the flow direction of groundwater,which generally flows from north to south,and finally discharges into coastal sea area.The tidal effect on the composition of stable isotopes is also primarily discussed here.
出处
《海洋科学》
CAS
CSCD
北大核心
2003年第9期1-6,共6页
Marine Sciences
基金
高等学校博士学科专项科研基金98038408号
福建省自然科学基金D97002号
厦门大学科研基金0050 Y07009号
