02367nam a2200253   450000500170000000800410001703500150005810000220007324500640009526000520015930000140021149000270022550001430025250200580039552012960045365000220174965000260177170000420179770000390183970000520187871000580193081000590198885600660204720260817162856.0120598         th                  eng    a.b100877951 aEleperuma, Tusita10aApplication of finite element method to catchment modelling  aBangkok :bAsian Institute of Technology,c1980  avi, 62 p.1 aThesis ;vno. WA-79-16  aA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Engineering and Technology  aThesis (M.Eng.) - Asian Institute of Technology, 1980  aIn early days, catchment simulation models assumed the hydrologic system to be a linear one, With the increase knowledge of the hydrologic  cycle and its behaviour, the use of non-linear models became popular in the recent past. Non availability of sufficient data, and high speed computers  together with lack of demand for high sensitive models delayed the development and use of distributed parameter models, which is the next step in the  development of catchment simulation models. As a part of the development of a distributed parameter model, which this study aims at, a simple finite element or precisely a finite strip  method is used to solve the governing equation, that has been derived from the basic hydrologic theories. In both, the derivation of governing equation  and the application of finite element method, the approximations used are  so great, that, if the discretization in both space and time is not sufficiently small, the errors evolved would be significant. Under these L circumstances, the model so developed, could be used to simulate only small  watersheds for short periods of time. To ascertain the versatility of the model, an attempt is made to simulate a small catchment having an area of about 40 Sq. km. and for a storm lasting not more than few hours.  0aHydrologic models 0aFinite element method1 aSelvalingam, Selvadore, eChairperson1 aGupta, Ashim Das, eCo-Chairperson0 aTawatchai Tingsanchali, eExamination Committee2 aThe Royal Netherlands Government, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. WA-79-16  3Fulll-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B22159