| Author | Shah-Newaz, Sardar Mohammed |
| Call Number | AIT Thesis no. WM-95-20 |
| Subject(s) | Fisheries--Bangladesh
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of EngineeFing, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-95-20 |
| Abstract | The floodplain fishery of Bangladesh plays an uniquely significant role in the dietary habits, economy and culture of the people of the country. In spite of the vast resource base, the growth of fish production has been low in the last decade and could not keep pace with the rate of population growth. Floodplain fishery which greatly depends on migration of brood fish to the spawning ground and spreading of fish seed to the floodplain might be adversely affected due to interferences with floodplain fish ecosystem by environmental changes and water development activities. Therefore a planning tool through which spreading of fish seed can be simulated under different scenarios is necessary to predict the effects. An attempt has been made in this thesis to develop a mathematical modelling approach as an useful planning tool to describe the movement of fish seed in the rivers, streams and on the floodplain and predict the anticipated effects on the fish seed movement under different scenarios. The Compatmetalization Pilot Project in Tangail in the North Central Region of Bangladesh has been selected as a case study area mainly because of the availability of the fish seed data. A suite of mathematical models based on MIKEl 1 system have been developed to describe the hydrological and hydraulic processes in the area. The advection-dispersion principle used in the MIKEl 1 system has been used to simulate the fish seed movement in the area. The hydrological and hydraulic models have been calibrated using the recent data of 1993 and 1994. The fish seed transport model could not be calibrated in detail level due to lack of data. However, with the limited data on fish seed, calibration results for 1993 condition indicate that the model is capable of describing the spreading process at least qualitatively. This research also includes an assessment of the impact of possible flood control measures and environmental changes on fish seed movement on to the floodplain through the model runs with 6 different scenarios. The analysis of the scenario results showed that the closure of the Dhaleswari river and water control structure on the Lohajang river reduces discharge and fish seed concentration to the downstream rivers and floodplain areas to a great extent. Loop cutting and dredging of Lohajang river mouth do not increase the discharge and fish seed concentration significantly. Finally, considering the outcome of this research work, the modelling approach has shown to be an useful planning tool to study the impact of the water development activities and environmental changes on the spreading of fish seed on to the floodplain. |
| Year | 1995 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-95-20 |
| 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) | Ammentorp, Hans Christian;Paudyal, Guna Nidhi |
| Examination Committee(s) | Little, David;Gupta, Ashim Das; |
| Scholarship Donor(s) | DANIDA;The Royal Danish Government; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1995 |