Development and utilization status in the basin of Shiyang river and water quality evaluation

摘要

A study on the development and utilization of the surface water and groundwater, and an evaluation about the quality of Shiyang river has been made in this paper. The basin of Shiyang river has a surface runoff uneven distribution of the year, a periodic internal variability and a down trend in total content. There is a serious phenomenon that the groundwater is over-exploited, the underground water level declines year by year, the dynamic general characteristics of underground water in recent years is persistent declining of underground water level. Influenced by industry water pollution, urban life water pollution, agricultural water pollution and water back, add the deterioration of the groundwater quality, groundwater salinity is increasing gradually, all kinds of harmful ion content increased year by year. With the development of our social economy and the acceleration of urbanization, the intensification of water shortage and pollution problem increasingly, the contradiction between supply and demand of water resources is sharp, which has become the important restrictive factors during the social sustainable development. The way of solving the crisis is to open source throttling, establish water-saving society and optimize the allocation of water resources, and strive to use the least amount of water resources to create the greatest economic benefits and social benefits. The basin of Shiyang river in Gansu province is located in the Hexi corridor, in the eastern part of the water resource in China, what is the typical continental river basin in arid zone. With the increase of population in the basin, the rapid development of economic society and water resources of long-term unreasonable exploitation and utilization of the amount of water into the lower greatly reduced, middle and downstream areas, and industry increasing contradictions between water, led to the soil and water loss, water pollution, desertification and ecological environment problems intensified.