Staged Water Price and the Water-saving Effect Calculation Mode for Domestic Water
Staged water price for domestic water is the hot spot in the water price revolution and study. The most attention has focused on the advantages and disadvantages, feasibility and advices on the staged water price decision-making, but less on the parameters estimation of the staged water price model and the water saving effect calculation. The present work studied the third- order staged water price mode and its methods for the parameters estimation. In this study, the water saving effect calculation model(WSECM) based on extended linear expenditure system(ELES) theory was established to simulate the relationship between staged water price and water usage. Taking Panyu district of Guangzhou as an example, the third-order staged water price for domestic water is supposed to implement in 2009. This WSECM was used to simulate the effect by the mode of the third- order staged water price in this case. It is showed that under the third- order staged water price mode, the magnitude of the domestic water usage of annual per capita would reduce 15.86 m3, falling 16.87% in theory.