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Status quo of Water environment in Yunnan Province and existing problem

HUANG Ying (Hydrology and Water Resources Bureau of Yunnan Province,Kunming 650118,China)  
According to observation and evaluation results on water quality of major river in Yunnan province,among total 9 280 km evaluated river reaches,76.3% of which are grade Ⅰ~Ⅲ in water quality.In general,water quality of main water systems in Yunnan province is good.But,water pollution is worsening.From 1985 to 2000,grade Ⅰ river reaches decrease by 2.3% annually while grade Ⅴ river reaches increase by 0.6% annually.Direct releasing of waste and sewage into the rivers is the main cause bringing about water pollution.Water environment has been a key problem influencing the sustainable development of society and economy.Protection of water resources should be strengthend and soil-water resources should be exploited and utilized scientifically.To effectively improve water environment,the pollution control should be carried out just from water sources and comprehensive treatment measures should be taken.
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