TY  - SER
AU  - ll Number:   AIT Thesis no.EV-85
AU  - Kreeta Sroikeeree
AU  - Orth,H.M.
AU  - Lohani,B.N.
AU  - Huynh,Ngoc Phien
AU  - Chongrak Polprasert,
ED  - US-ASEAN,
TI  - Least cost design of drainage systems with three-dimensional state variables
T2  - Thesis
PY  - 1985///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Flocculation
N1  - A thesis submitted in partial fulfillment of requirements for the degree of Master of Engineering, School of Environment, Resources and Development; Thesis (M.Eng.) - Asian Institute of Technology, 1985
N2  - Drainage 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}
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B20014
ER  -