The role of Economic and Noneconomic Factors on Residential Water Demand

Estimation of water demand in the different sectors، spatially in the urban areas is an important subject that it has considered by scientists and economic researchers’. Water shortage and related challenges are most important problems of cities. This study was done according to Stonegray function and consumer behavior in microeconomic theory. Lineline، log line، loglog and some kinds of econometrics'' functions was used in the analysis. Price and income elasticties were and respectively. Water consumption in autumn and summer was 1. 7 times greater than winter and spring. Three hindered and eighty households were chosen by using systematic sampling in Ilam. Price and income variables were measured on water consumption. Results show that، if we want to decision making to block rate pricing of residential water، we should pay attention to another variable such as weather temperature، size of home، size of family، tabs number، garden، yard، pool، pressure of water and consumption zone. Regression coefficients show that there were significance associations between water price and income with water demand.