Research On Water Environment Carrying Capacity Of Tieling

Tieling section of Liao River which is seriously polluted is located in upper of Liaoriver. Because of several tributaries, industrial wastewater and domestic sewage flowingto the mainstream, it resulted in serious water pollution and leaded to reduce thefunction of water body and directly affect the water quality of the lower of the cities.Furthermore, developed agriculture, non-point pollution and lacking of managementbrought about ineffective utilization of water resources and serious pollution. Theseexisting problems have become restraints against the sustainable development.This paper restricted by water environmental capacity engaged in research on thewater environment carrying capacity (simplified as WECC) of Tieling section of LiaoRive aimed at promoting sustainable development of environment and society. Onedimensioned model is selected to calculate the water environmental capacity withanalyzing current status of water pollution and resources on the basis of theoreticalanalysis about WECC. A model of WECC on Tieling section of Liao River was set upusing the method of system dynamics (simplified as SD). Several indexes such aspopulation, industrial and agricultural development scale etc are chose to measureWECC. The main achievements obtained are as follows:⑴The value of water environment capacity calculated by one dimensioned modelfor Tieling section of Liao River is about9179.13t/a on the basis of designed flow andvelocity.⑵Using system dynamics to found the system dynamics model of waterenvironment carrying capacity in Tieling section of Liao River can factually describethe real system, for its error is no more than10%.⑶Choose14variables as decision variables according to features of the modeland macro-economic conditions. Through analyzing5designed schemes, thecomprehensive scheme is the best one which is adapted to socio-economic conditions.