Study On Estating Models For Estimation Of Per Capita Domestic Wastewater Discharge

With the urbanization development quickening, municipal domestic sewage discharge is becoming more and more, the increasingly serious water pollution reduces the use function of the water body, it has become the serious restricting-factor of economic and social sustainable development. Domestic wastewater discharge system are complicated, and afecting factors are diversify, The dissertation studied the different influencing factors of domestic wastewater discharge, and established linear models for estimation of per capita domestic wastewater discharge. The models could be used in domestic wastewater treatment planning.In application, per capita different domestic wastewater discharge were the specific studied objects of this dissertation.Firstly, infiuencing factors of per capita domestic wastewater discharge were chosen; mean per capita domestic wastewater discharge in city proper of Suzhou and the influencing indices data were collected.Secondly, analysis of bivariate correlation was applied to select the influencing factors. Thirdly, individual influences of the factors were analyzed by means of scatterplot drawing and curve estimation.Lastly, linear estimation models of per capita domestic wastewater discharge were established by stepwise method.The results showed that the linear model of per capita domestic wastewater discharge included only one independent Density of per capita output value tertiary industry. R was 0.930, and Ra 2dj was 0.856. In all the chosen influencing factor, population, per capita output value tertiary industry, per capita arrange income of inhabitant, per capita store of inhabitant, per capita housing area, per capita road area, per capita public green field area showed obvious positive relations with domestic wastewater discharge. Per capita domestic water per day using, precitation capacity showed no obvious influences on domestic wastewater discharge..