The Research Of Tongchuan New-District Water Environment System Simulation

Applying the modern computer simulation technique to study water environment system, the simulation result is visual in the case of different pollution conditions and different pollution control plans. On basis of it, the water manager can rapidly and flexibly mastery and forecast region water environment pollution condition, and easily draw scientific comprehensive control plan.At first, this paper divides Tongchuan New-District into five water environmental function areas, it assesses the water environmental quality with fuzzy comprehensive judge and takes CODcr as the major pollution factor, it quantifies the regional pollution drainage in the planning year of 2010 with gray model.Next, water environment simulation system is designed as a whole from aspects of system functions analysis, flow analysis, system framework and database.Moreover, base on characteristics of the river of Tongchuan New-district and the process of organic transferring and transforming, the one-dimension steady water quality physical model of Tongchuan New-district is established, furthermore model parameters is estimated with least squares method. The water quality simulation model of Tongchuan New-district is developed with MATLAB/SIMULIN simulation platform, water pollution control system simulation model is built with optimize toolbox of MATLAB.At last, the simulation experiment is carried out on simulation platform, varied effects on water quality are researched in the case of different value of runoff, pollution drainage, CODcr attenuation factor and initial section concentration; aiming at whole cost lowest and meeting the water quality demand, at the mean time, the distribution of pollution reduction quantity for each sewage system is coordinated, water pollution control system simulation calculating is carried out, and the Qishui River water pollution control plan is worked out.