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035 _a.b10399197
099 9 _aAIT Thesis no.EV-85-15
100 _all Number: AIT Thesis no.EV-85
100 0 _aKreeta Sroikeeree
245 1 0 _aLeast cost design of drainage systems with three-dimensional state variables
260 _aBangkok :
_bAsian Institute of Technology,
_c1985
300 _a51, (39) p.
490 1 _aThesis ;
_vno. EV-85-15
500 _aA thesis submitted in partial fulfillment of requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1985
520 _aDrainage systems can be efficiently designed for minimum cost by Dynamic Programing. Present models generally use a one-dimensional state variable with the pipe level as parameter. Although the theoretical need for at least a two-dimensional state variable is recognised, more dimensional state variables are still considered as impracticable due to computational requirements. In this study one-, two-, and three-dimensional models were developed. The parameters are the pipe elevation, the pipe diameter, and the time of flow as in the Rational Method. The model has been implemented on a IBM personal computer. Three test examples show the operationability of the developed program. It has been found for the test examples that introducing the time of flow into the state variable reduces the least cost between 0 and 7.2%. Depending on topography, introducing the diameter in some certain cases reduces the least cost more than 17% {u2022}
650 0 _aFlocculation
700 1 _aOrth, H.M.,
_eChairperson
700 1 _aLohani, B.N.,
_eExamination Committee
700 1 _aHuynh, Ngoc Phien,
_eExamination Committee
700 0 _aChongrak Polprasert,
_eExamination Committee
710 2 _aUS-ASEAN,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-85-15
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B20014
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