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005 20260818153713.0
008 121095s1982 th uu m rtt 00| a1eng d
035 _a.b10408046
099 9 _aAIT SSPR no. CA-82-13
100 1 _aMah, Youn Chin
245 1 0 _aLong range forecasting of Mekong River streamflow
260 _aBangkok :
_bAsian Institute of Technology,
_c1982
300 _a49 p.
490 1 _aSpecial studies project report ;
_vno. CA-82-13
500 _aA special study submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology
502 _aSpecial Studies Project Report (M. Sc.) - Asian Institute of Technology, 1982
520 _aDaily 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.
650 0 _aHydrological forecasting
700 1 _aRadok, Rainer,
_eChairperson
700 1 _aHuynh, Ngoc Phien,
_eExamination Committee
700 1 _aLe Huu Ti,
_eExamination Committee
710 2 _aThe Government of Australia,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tSpecial studies project report ;
_vno. CA-82-13
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B21060
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