论文部分内容阅读
1 前言珠江是我国南方的重要水源。珠江流域跨越滇、黔、桂、粤、湘、赣6省(区),面积约45.4万km~2,人口近9000万。流域多年平均水资源总量3360亿m~3,约为长江年径流量的1/3,居全国7大江河的第2位,径流模数则居第1位。流域工农业年用水量516.9亿m~3(1985年统计),水资源利用率仅为12.5%,开发利用潜力很大。然而,随着国民经济的发展,工农业和人民生活用水、需求量以较高的速度增长,水污染的问题也日趋加剧,局部河段污染已相当严重。据1993年开展的珠江流域重点城镇(83个市、县)的人河排污口调查结
1 Introduction Pearl River is an important source of water in southern China. The Pearl River valley across Yunnan, Guizhou, Guangxi, Guangdong, Hunan and Jiangxi provinces (regions), an area of about 454000 km ~ 2, a population of nearly 90 million. The average water resource in the basin has a total of 336 billion m3, about 1/3 of the annual runoff in the Yangtze River, ranking the second in the seven major rivers in the country and the runoff modulus being the first. Annual industrial and agricultural annual water consumption of 51.69 billion m 3 (1985 statistics), the utilization rate of water resources is only 12.5%, great potential for development and utilization. However, with the development of the national economy, water for industry, agriculture and people’s livelihood has been growing at a relatively high rate of demand. The problem of water pollution is also aggravating day by day. Pollution in some river sections has become quite serious. According to the poll conducted by the People’s River Outfall Survey conducted in 1993 in key towns and cities in the Pearl River Basin (83 cities and counties)