Discussion on Water Resources Decline in Shanxi Province

The paper analyses the definition,the quantity and the evaluating methods of the water resources,and points out that the view of water resources decline is untenable.The water resources keep constantly the dynamic equilibrium.When the series length in the sample is not same,the average value should be differeent too.Actually,the problem for runoff decline should be analyzed from the aspects of rainfall and humanactions,and not simply decided.