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Estimation of flood flows for ungauged catchments in Kashmir (Pakistan) | |
Author | Hussain, Basharat |
Call Number | AIT Thesis no.AE-92-49 |
Subject(s) | Flood forecasting--Pakistan |
Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
Publisher | Asian Institute of Technology |
Abstract | The study deals with the regional analysis of flood characteristics in Kashmir area, which drains towards Arabian sea. Many streams in Kashmir originate in high mountains areas and flow towards much flatter plain or plateau areas. Floods in these streams at high elevations are caused by snow-melt runoff, but at lower reaches flood peaks are influenced by rainfall as well. In this context, the mean maximum temperature of three months - June, July and August - is taken as an index of snow-melt with other basin and climatological parameters. Three methodologies - namely the index flood method, regression of mean and coefficient of variation of annual maximum discharge on catchment characteristics, and regression of maximum likelihood estimates of Gumbel distribution on basin characteristics - were applied to estimate design floods for different return periods. Hydrometeorological and physiographical parameters were determined for 24 gauged basins. After homogeneity test 20 basins were seen as homogeneous and were used in the analysis. The catchment characteristics used are basin area, mean annual rainfall, slope of the main stream, length of main stream, and mean maximum temperature. Based on the results and coefficient of determination the "regression of mean and coefficient of variation of annual maximum discharge on catchment characteristics" was selected as the best fit to estimate design flood for any ungauged location in Kashmir area. This study is intended to serve as the basis for generating basic hydrologic information for ungauged basins with no or limited stream flow data. |
Year | 1992 |
Type | Thesis |
School | School of Environment, Resources, and Development (SERD) |
Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
Academic Program/FoS | Agricultural and Food Engineering (AE) |
Chairperson(s) | Loof, Rainer ;Nophadol In-na |
Examination Committee(s) | Paudyal, Guna N. ;Onta, Pushpa Raj |
Scholarship Donor(s) | Deutscher Akademischer Austauschdienst (DAAD); |
Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1992 |