论文部分内容阅读
珠江西航道和流溪河在广州市区上游，为广州市主要水源区。由于感潮作用，受市区严重污染的水体因涨潮上溯而向上游传输，严重影响上游水质。因此，弄清感潮作用对广州水源区水质的影响程度和范围，对水源保护与利用有重要意义。本研究从下游到上游，对水源区底泥中有机物特征进行了分析，结果表明：（１）从下游到上游，受感潮作用影响逐渐减小，污染程度逐渐减轻；（２）水源区有机物特征呈有规律变化。从靠近城市的下游到远离城市的上游，底泥中有机物从人为污染来源为主逐渐变为水体中现代天然动植物来源为主；（３）在石门和雅岗河段之间，各种有机地球化学参数表明，水质特征发生了根本的转变，说明雅岗以上河段水质受感潮作用影响程度很小。
Pearl River West Channel and Liuxihe in the upper reaches of Guangzhou City, Guangzhou City, the main water area. Due to the tide effect, heavily polluted water in urban areas is transported upstream due to high tides and seriously affects the quality of the water upstream. Therefore, it is of great significance to clarify the extent and scope of the impact of the tide on the water quality in the water source area of Guangzhou, which is of great significance to the protection and utilization of water sources. The characteristics of organic matter in the sediment of the water source area were analyzed from the lower reaches to the upper reaches. The results showed that: (1) from the lower reaches to the upper reaches, the influence of the tide effect gradually decreased and the pollution degree gradually reduced; (2) Characteristics showed a regular change. From the lower reaches of the city to the upper reaches of the city far away from the city, the organic matter in the sediment gradually changes from anthropogenic pollution sources to modern natural plants and animals in water bodies. (3) Between Shimen and Yaogang sections, Geochemical parameters indicate that the water quality characteristics have undergone fundamental changes, indicating that the water quality of the river above Yagang is only slightly affected by the tide effect.