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035			_a.b10083777
099		9	_aAIT Thesis no. 1370
100	1		_aSivakumaran, Nagalingam Subramaniam
245	1	0	_aAnalytical review of the non-linear catchment models
260			_aBangkok : _bAsian Institute of Technology, _c1979
300			_a110 p.
490	1		_aThesis ; _vno. 1370
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1979
520			_aThe study focusses its attention on system analysis approach to quotative modelling of rainfall - runoff relationship. Beginning with the conventional instantaneous unit hydrograph theory a brief mathematical review of the functional series model and the various methods that are currently in practice to evaluate it's kernels is presented. An elaborate mathematical analysis of a stationary, non-anticipating initially relaxed ·quadratic functional series model along the lines of Diskin and Boneh, but using total rainfall and total runoff instead of effective rainfall and direct runoff as used by Diskin and Boneh, is performed to identify and sum up the properties of the first and the second order kernels. Hence a Laguerre-exponential function is introduced to model the second order kernel and a special least square method is device to calibrate it. A feedback control model (FCM) with a constant feedback factor is postulated anticipating the fact that the feedback component may model the losses such as infiltration, etc. and thus allows the use of total rainfall as input. Z-transformation and matrix inversion (pseudoinverse) techniques are explored to calibrate this model. Extended 0-Delay Filter method (E0-DFM) based on the assumption that the rainfall is white noise is reviewed. FCM and Eo-DFM were· used to simulate two smaller catchments (drainage area < 500 sq.km) in North-Eastern part of Thailand. It was found that FCM predicts well for the case (a wet year) where the prediction is reasonable without a feedback. For a medium year the system seems to accept only a little feedback thus stipulating a time varying feedback function. The overall prediction of Eo-DFM was found to be unsatisfactory. In this case, the prediction of FCM is found to be better than that of Eo-DFM. H9wever, this is not a universal statement unless we have thoroughly identify some conditions under which each of them is applicable in relation to catchment and rainfall properties. The failure of the use of runoff coefficient reflects the fact that those definitions of runoff coefficient are not universal unless some constraints are identified in relation to catchment and rainfall characteristics to select the suitable definition for a catchment.
650		0	_aHydraulic models _xMathematical models
700	1		_aSelvalingam, Selvadore, _eChairperson
700	1		_aChiev, Khus, _eCo-Chairperson
700	1		_aEggers, Helmut, _eExamination Committee
700	1		_aHuynh Ngoc Phien, _eExamination Committee
710	2		_aGovernment of Netherlands, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. 1370
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B22429
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909			_aBarcode : 30050003026688 _bCREATED : 1994-05-16 _cRECORD # : i10086638 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160082359 _bCREATED : 2016-05-13 _cRECORD # : i12977676 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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