Based on economic loss rate of water due to pollution,the damage extent of utilizing function of water in the Hulun Lake was assessed through investigation,monitoring and analysis during the icebound season and non-icebound season in 2008.The results show that water in the Hulun Lake is not suitable for service as water source for drinking and swimming.As a sort of water used for fishing,irrigation and residential environment,it is still in good condition.But as a sort of water used for recreation,it is mod...