东江干流河水的来源、水质及水资源保护  

Water source,quality and aquatic environment protection of Dongjiang River

作　　者：鲁垠涛[1] 唐常源[2] 陈建耀[3] 李发东[1] 佐仓保夫[4] 

机构地区：[1]日本千叶大学自然科学研究科,日本千叶263-8522 [2]日本千叶大学园艺学部,日本千叶271-8510 [3]中山大学,广州510275 [4]日本千叶大学理学部,日本千叶263-8522

出　　处：《中国生态农业学报》2008年第2期367-372,共6页Chinese Journal of Eco-Agriculture

基　　金：日本学术振兴会科学研究费实辅助金(萌芽研究,16651004);日本学术振兴会科学研究费实辅助金(基盘研究B,18300312);中国国家自然科学基金(40571027);“985工程”(105203200400006)资助

摘　　要：为了解东江河水的来源和水质状况,沿东江干流采集河水样品,分析河水中的主要离子浓度以及氢和氧的同位素比。结果表明,河水氢同位素比(δD)为-48.9‰^-39.8‰,氧同位素比(δ18O)为-6.3‰^-5.7‰。根据氢氧同位素的相关关系,以河源市和汝湖镇为界,将研究范围内的东江干流分为Ⅰ、Ⅱ和Ⅲ段。Ⅰ段和Ⅱ段河水主要来自流域内的大气降水,由于河水与含有较高氧同位素比的岩石发生氧元素交换,使Ⅱ段河水呈现氧同位素漂移。Ⅲ段河水主要来自象头山和罗浮山山区的降雨并通过地下水补给。由于河水本身的稀释作用,东江河水中各离子浓度很低。人类活动相对频繁的东江下游的离子总量远大于上游和中游地区,说明人类活动对东江河水存在着潜在的影响。东江河水的污染来源可分为点源污染和面源污染,针对这两种污染分别提出了相应的措施。另外,香港饮用水与北部山区的地下水有密切关系,为保持香港水源的良好水质,应把保护北部山区的地下水列为战略重点。In order to understand the source and quality of Dongjiang River, water samples were collected along the river and major ion and stable isotope （^18 O and D） concentrations measured. The δ^18 O and δD of the sampling sites vary from - 6.3%0 - 5.7‰ and - 48.9‰ - - 39.8‰, respectively. Based on the composition of δ^18 O and δD, three parts （part Ⅰ ,Ⅱ , Ⅲ） are identified along the river. The part Ⅰ ,Ⅱ , Ⅲ respectively coincide with the upper, middle and lower reaches of the fiver. The main source of the fiver water in Ⅰ and Ⅱ parts is precipitation, and exchange of ^18 O between water and rock occurs in part Ⅱ. River water in part Ⅲ is primarily by groundwater discharg which transformed from precipitation runoff in North Xiangtou and Luofu Mountain ranges. Major ion concentration is low due to dilution by the fiver, however, total ion content in part Ⅲ, where human activity is more intense, is higher than that in part Ⅰand Ⅱ, implying a latent effect of human activity on Donjiang River water. Pollution sources to Donjiang River include point-source and diffuse-source. Some countermeasures to the pollution phenomenon are advanced in this paper. In addition, it is prudent to protect groundwater systems of North Xiangtou and Luofu Mountain ranges for best preservation of water quality and potable water availability, especially to Hong Kong. This is because groundwater of North Xiangtou and Luofu Mountain ranges is the main source of water for the lower reach of Dongjiang River, which is the source of potable water supply for Hong Kong.

关 键 词：东江 同位素 离子含量 河水补给源 水质 水源保护 

分 类 号：TU991.111[建筑科学—市政工程] X522[环境科学与工程—环境工程]