The Water Quality Problem of Rainwater Utilization in the Arid Region of Northwest China

摘要

In this paper we have analyzed and assessed the water quality of the catchment and storage rainwater in the typical areas of Northwest China and made some conclusions that main factors exerting influences on the wafer quality are:air pollution, the building materials of catchment sur-faces and water cellars, hygienic conditions, and that the water quality has seasonal and regional changes and the indices of rainwater commonly keep in accoudance with the national criteria of water quality of drinking and irrigation water, and that the most of the indices of the rainwater are superior to those ot local spring and river water. Thus the catch-ment and storage rainwater is a new type water resource which is whole some and has much potential of solving the problem of domestic water in the arid areas.