水生生物环境诊断(AOD)技术应用研究

介绍一种新型的毒性试验方法——水生生物环境诊断(AOD)技术，该方法将冷冻浓缩和生物测试技术有机地相结合，较好地解决了低毒性水体的毒性测试问题。应用本项技术以红鳍鱼为受试生物，分别对湖北武汉马伧湖、墨水湖、广东深圳河、长江干流寸滩等几个断面、丹江口水库白河、丹江河口、老灌河等不同水体进行AOD测试，所得48hr-LC\-50结果与实际水质状况基本相符。

Yangtze protection —— heavy burden and long road

The water resources of the Yangtze river is the most important in China, amounting to 35% of the total national water resources. The protection of water resources and the ecologoical environment of Yangtze valley is of vital importance to the existence of the Chinese nation and the sustainable development of Chinese economy. With the economic development and the population growth, the water pollution in Yangtze valley has become increasingly serious. Athough being controlled in local area, the pollution is still worsening in general. The point source pollution discharge is a main factor to water pollution in Yangtze valley. The direct causes of serious water pollution in the valley are that the drainage water from industrial and mining enterprises in the valley increases annually, the ratios of treated and up to standard water are low, the most of drained sewage water is untreated. Nonpoint source pollution caused by soil washing has also become an important factor influencing the water quality of Yangtze. Lake eutrophication is the comprehensive result of point and nonpoint pollution. The main water pollution status quo in Yangtze valley are as follows: there exist pollution belts near the bank of urban river sections, water pollution in middle and small rivers as well as in urban rivers is serious, the pollution transfers to the downstream of city and to the Yangtze, eutrophication in lakes is prominent, water pollution of the Yangtze impacts the ecological environment of the East China sea, pollution accident and pollution caused by ship on the river have not been effectively controlled, water pollution has threatened the safety of water supply and fishery resource. At present, the water resources protection of the Yangtze is still confronted with very severe situation. As water is the substance base on which human rely for existence, so, in the mean time of economic development, how to protect Yangtze is an arduous and longterm task we confront with.