Contrary to the social-economic development of the middle and lower reaches of the Hanjiang basin, which is almost in the territory of Hubei province, quality of the water in this basin becomes worse and worse. Hubei province always attaches importance to the water-environmental protection of the Hanjiang basin in its territory. Lately, not only the enforcement of the water-environmental protection laws was strengthened, but also the prevention and management of water pollution were supported by Hubei province. But the actual result is not worth optimistic, because the water-environment in the...