深圳沿海表层海水与地表水关系的地球化学分析

Geochemical analyses of the relationship between surface water and surficial seawater along the coast of Shenzhen

摘要: 依据深圳沿海所取31件表层海水样品的水化学数据,对主要离子Ca2+、Mg2+、Na+、K+、SO42-和HCO3-与C l-以及B r-与C l-的关系作散点图分析。西海岸表层海水Ca2+、K+、SO42-和HCO3-与C l-的比偏离海水稀释线,源于其位于珠江河道影响范围,与珠江水有不同程度的混合;东海岸表层海水Ca2+、K+和HCO3-与C l-的比主要围绕海水稀释线波动,表明沿海表层海水流动缓慢,受表层海水蒸发和当地沿岸污染河水排泄的长期累积影响;靠近深圳湾的5件西海岸海水样品成分与东海岸表层海水相似。

Abstract: Based on hydrochemical data of 31 surficial seawater samples collected along the coast of Shenzhen,scatter diagrams of major ions(Ca2+,Mg2+,Na+,K+,SO2-4 and HCO-3) vs Cl-,and Br-vs Cl-are analyzed.On the western coast,the Ca2+,K+,SO2-4 and HCO-3 vs Cl-of surficial seawater deviate from the seawater di...