Study On The Mass Control Of Aquatic Environment Pollution Drainage In Zhang Ye Reach Of The Hei River Valley

Hei River is the second bigger continental river in the Northwest of China. Its trunk stream flows Gan Zhou City,Lin Ze City and Gao Tai City which belong to Zhang Ye City's district and are such as huge population density﹑mass towns,more higher developmental level of industry and agriculture. They are the very important economic developmental district in Gansu Corridor district. With the population increasing and the social economy developing, the sewage come from industry and town living increase continuously, but the city's equipments which are used to drain sewage and dispose sewage are insufficient and some harmful substance which be not disposed were directly or indirectly pour into Hei River, then arose water pollution and appear to the problem about the aquatic environment's pollution. This paper point out the problems and potential crisis's which this area's aquatic environment has to face by analyzing the aquatic environment's actualities in Zhang Ye Reach of Hei River Valley. In order to protect the aquatic environment in this Reach, make its reach the aim of local aquatic environment's protection in three layout years, the article make the masses control of aquatic environment pollution drainage in order to discuss the effective way to protect the aquatic environment.The partition of function districts of aquatic environment in Zhang Ye Reach of the Hei River Valley is base on the aquatic environment protect demand and distributing of monitor section; then I put up the assessment aquatic environment, and calculate the masses sum of pollution in different layout years through basing on the economy developmental plan. After this, according to the flow characteristic, hydrological dates and water quality dates in Zhang Ye Breach of Hei River Valley ,we used water quality model to simulate the changeful case of water quality, used water environmental capacity model under completely mixtures conditions counted out CODcr and NH3-N aquatic environmental capacity of the low water period, the high water period, the par water period in different layout years. On the base of these studies, the non-uniform coefficient is introduced into the consideration of aquatic environmental capacity to calculate the aquatic environmental capacity under non-uniform coefficient conditions. According to Zhang Ye Breach's the aquatic environment's protect program, we analyzed Gan Zhou City, Gao Tai City's sewage disposal factories which will have been constructed before 2010 year, then compared the forecasted results of aquatic environment pollution in different layout years with those , got these cities' three layout year's sewage and pollution quantity of entering river ,and analyze three cities' the layout years pollution quantity of entering river and the aquatic environmental capacity. The result show that Gan Zhou City and Gao Tai City the layout year's sewage and pollution quantity of entering river is obviously lower than sewage factory's handle ability and the all local sewage which is disposed is laid out the local environmental protection plan to refresh, after 2010 years Gan Zhou City and Gao Tai City can no longer make the masses control of aquatic environment pollution drainage. About Lin Ze City, because the pollution quantity of entering river is higher than the function districts of aquatic environment, consider with local situation, make the countermeasure of controlling the masses control of aquatic pollution, make sure the aquatic environment pollution quantity decreased of each contaminative sources and solve the problem of local pollution situation in layout years.