Mah, Youn Chin creator Radok, Rainer Chairperson Huynh, Ngoc Phien Examination Committee Le Huu Ti Examination Committee The Government of Australia Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1982 continuing eng 49 p. Daily river streamflows at one station (Vientiane) along the Mekong River are studied using a historical approach to obtain a long range flood forecast, with the objective of over-coming short-term hydrological uncertainty and the narrow limitations in time of process- based models. Only daily discharge data are used in the present approach . Sixty years of data are considered as one continuous time series; a suitable linear filter is applied to separate short period variations due to rain storms from the main hydrograph . Cross-correlation coefficients between all years are computed and arranged in the upper triangle of a matrix. This matrix is then used to identify the groupings of years of closest correlation or 'fit' to each other. Given the first few months of a year, the group which best fits a current flood season can be identified by used cross-correlation coefficients . It is proposed to use the average filtered hydrograph of that groups to forecast the future of the on-going season. Apart from the mean curve, the short period residues, filtered from the original curves, are analyzed statistically . The frequencies and return periods of these residue heights are used for short term forecasting. A special study submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology Special Studies Project Report (M. Sc.) - Asian Institute of Technology, 1982 Hydrological forecasting Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B21060 http://203.159.5.9/ait-thesis/detail.php?q=B21060 121095 20260818153713.0