02209nas a2200229   450000500170000000800410001703500150005810000120007324501120008526000520019730000260024949000270027550001060030250200580040852012480046665000480171470000290176270000360179170000370182771000560186481000590192020260817173424.0301098s1983    th      r     000| 0eng d  a.b100256860 aPamekas12aA comparison between Hardy Cross method & O. R. based procedure for the design of water distribution system  aBangkok :bAsian Institute of Technology,c1983  av, 70, A-37, B-137 p.1 aThesis ;vno. EV-83-20  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering  aThesis (M.Eng.) - Asian Institute of Technology, 1983  aThe quality and applicability of the linear optimization model was  compared to the Hardy Cross method.  1'he result indicates that the'new methods more qualitative which  satisfies all constraints simultaneously. However, in some cases, the  product is not practical and this could be adjusted and checked by Hardy  Cross.  The new method is applicable for the optimum design at one run when  the constraint is set up accurately. Moreover, the determination of short-  est path, the change of objective function and the extensification design  employing the equivalent pipe principle demonstrate their capability.  However, it is observed that the new model is sensitive to the particular  type of layout.  Although several runnings are needed by Hardy Cross, the method is  applicable for the design as well as checking. However, this method is  sensitive to the initial guess of pipe which affects the solution which  therefore does not converge.  Moreover, to be sure that this design is optimum, the result should  be compared to the result of the linear optimization model.  Finally, the combination of the linear optimization model and the·  Hardy Cross method produces a higher quality result compared to the ori-  ginal Hardy Cross. 10aWater quality managementxNepalxPhewa Lake1 aOrth, H.M.,eChairperson1 aNguyen, Cong Thanh,eCo-Advisor1 aFude, I.,eExamination Committee2 aThe Federal Republic of Germany,eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. EV-83-20