Morphological behavior of Jamuna River | |
| Author | Islam, Md. Mainul |
| Call Number | AIT Thesis no.WM-95-03 |
| Subject(s) | Jamuna River Morphology |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-95-03 |
| Abstract | Jamuna is a highly active river in morphological consequences with most random cross sections. Overall prediction of this river is essential for any successful river management program and better environment in near future. The morphology of the Jamuna River is studied under two broad spectra of (i) Analysis of Present Responses and (ii) Future Morphological Prediction. The present trends of river responses are analyzed using the collected cross-section data, hydrological and sediment data and Landsat Images. Dimensionless term 'Relative Conveyance' is used to study the spatial and temporal variation of complex cross sections in an easier way. Hydraulic parameters are determined theoretically by invoking regime approach intermingling with physical relationship. Extremal hypothesis of Minimum Stream Power is used in the analysis together with the modified EngelundHansen roughness predictor and Engelund-Hansen sediment transport formula. Bankful discharge and corresponding sediment transport are taken as control variables. Planform characteristics are determined using the known set of hydraulic parameters for low sinuous river. From the study it is found that the Jamuna is a braided river in planform. The intensity of braiding decrease with downstream direction. The river at present is in quasi-equilibrium condition with time elapsed. Sediment hydrograph precedes the discharge hydrograph indicating its high amount. Sensitivity analysis shows that the mean size of bed material load and number of channels has significant influence on the hydraulic geometry. Two new formulae are developed in order to predict the cross sectional flow area and channel bed slope at bankful capacity considering the river in regime condition. Planform geometry varies with the number of channels and valley slope. |
| Year | 1995 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-95-03 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Suphat Vongvisessomjai; |
| Examination Committee(s) | Kyotoh, Harumichi;Sutat Weesakul; |
| Scholarship Donor(s) | Asian Institute of Technology (AIT); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1995 |