Abstract
In this paper, industrial and household water use was surveyed and analyzed in Lower Chao Phraya River Basin. Water use unit analysis is a main initial part of water demand management model. Questionnaire, interview and field survey were selected to collect data. Three main topics are concentrated in this survey;(1) water use and source, (2) water use in each process, and (3) water situation in the future. At 95 percentages significant level, 400 samples of each industrial and household questionnaires is needed for analyzing. Industrial water unit use by International Standard Industrial Classification (ISIC) code in unit of cubic meter per million Thai baht was analyzed from surveyed water use data with monetary term of intermediate transaction from analyzed input-output table. In study area, average industrial water use unit is 2.2m3/d/M. THB. The main water users are textile, chemical, and food product. Household water use unit in Bangkok with 346 liter per capita per day is the highest in study area because of high water consumed activities from higher daily life styles.
