Stable depth of self-formed rivers in the transition from gravel rivers to sand-silt rivers | |
| Author | Gautam, Navin |
| Call Number | AIT Thesis no.WM-99-4 |
| Subject(s) | Rivers Hydraulic engineering |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Abstract | Rivers are commonly seen to have their banks composed of suspendable fine materials whereas the bed is composed of both relatively coarse materials, which are mainly transported as bed load and fine materials, which are mainly transported as suspended load. This morphology appears in the transition from the gravel river to the sand-silt river. In this study a mathematical model is presented to determine the stable depth of self-formed rivers in the above mentioned transition phase of the rivers by extending the theory of equilibrium cross-section of sand-silt rivers along with the theory of gravel rivers to include the case of gravel bed partially covered with fine sand. The perturbation technique is employed to solve the equation of sediment balance and shear stress distribution in the bank and bed region. The results show that the stable depth of the rivers in the transition zone is a function of suspended sediment concentration in the central bed region, sediment size and channel slope. The present study has been able to explain the variation in central depth of the rivers in the transition zone considering the effect of the variation of suspended sediment concentration. |
| Year | 2000 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Izumi, Norihiro; |
| Examination Committee(s) | Gupta, Ashirn Das;Suphat Vongvisessornjai;Sutat Weesakul; |
| Scholarship Donor(s) | Government of Japan; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2000 |