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Table 1

Classification and description of rivers in different health level

Health levelComprehensive scoreDescription
Very healthy (85,100) Rich in water resources, good water ecological environment, satisfied the reasonable needs of human social and economic development for the basin resources. 
Healthy (75,85) Relatively good status in hydrology and water environment, basically satisfied the reasonable demand of human social and economic development for basin resources. 
Unhealthy (30,50) Threatened health status of the basin, scarce water resources, fragile water ecological environment, maladjusted system structure, damaged function, but some functions can be maintained. 
Morbid (0,30) Basically, loss of every function, or some indicators are extremely low. 
Health levelComprehensive scoreDescription
Very healthy (85,100) Rich in water resources, good water ecological environment, satisfied the reasonable needs of human social and economic development for the basin resources. 
Healthy (75,85) Relatively good status in hydrology and water environment, basically satisfied the reasonable demand of human social and economic development for basin resources. 
Unhealthy (30,50) Threatened health status of the basin, scarce water resources, fragile water ecological environment, maladjusted system structure, damaged function, but some functions can be maintained. 
Morbid (0,30) Basically, loss of every function, or some indicators are extremely low. 
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