韩江是我省东部地区一条重要河流,是粤东供水的生命线,担负着为粤东梅州、潮州、汕头三市近千万人口提供饮用水源的重要功能。目前,中、上游地区还相对贫困,虽目前尚能保持较好的水质,但上游的某些城市江段由于受纳大量未经处理的污水,已经受到一定程度的有机污染。韩江流域的主要 Hanjiang River is an important river in the eastern part of our province and the lifeline of water supply in the eastern part of Guangdong Province. It plays an important role in providing drinking water sources to nearly 10 million people in the three cities of eastern Guangdong, Meizhou, Chaozhou and Shantou. At present, the middle and upper reaches are still relatively poor. Although better water quality can still be maintained at present, the upper reaches of some urban rivers have been subject to a certain degree of organic pollution due to the large volume of untreated sewage. Hanjiang River Basin’s main