| Author | Mamun, Abdullah Al |
| Call Number | AIT Thesis no. WM-95-22 |
| Subject(s) | Flood forecasting--Bangladesh
|
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Civil and Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-95-22 |
| Abstract | Flash floods in the Northeast region of Bangladesh are usually generated from the hilly
catchments of India from where no hydrometeorological as well as hydrological data are
available to forecast these. In such circumstances this study has the objective to analyze the
possibility to forecast flash floods of the Northeast region of Bangladesh with the help of
available data inside Bangladesh by using the user friendly computer model MIKE 11. Two
flashy river systems Manu-Dhalai and Khowai, originated from the Indian state of Tripura have
been selected for this purpose.
The Indian subcatchments, contributing floods to these river systems have been calibrated
(as NAM catchments) with respect to the discharge stations available inside Bangladesh border.
The HD models were schematized by using discharge as upstream and water level as downstream
boundary. The NAM models were incorporated to the HD models by distributing the NAM
inputs through 20 kilometers of lengths in the Indian side assuming zero discharge at the
upstream point. The HD models calibrations and validation gave quite good results. In case of
NAM model the calibration was difficult and hence only the high peaks were considered for the
calibration. After calibration of NAM and HD models some test forecasts were carried out to see
the stability of the models. The forecasting points were in Moulvibazar and Shaistaganj for
Manu-Dhalai and Khowai river systems respectively. Before flood forecasting exercise the
updating parameters were calibrated.
The flood forecasting exercise for the Manu-Dhalai river system showed it is possible to
forecast the flood peaks accurately with short lead times (24 hrs.<). Where as the results of the
Khowai river system indicated, however it is not possible in all cases. The long-term forecasts
(>24 hrs.) were not too accurate for both the river systems. Finally this study concluded with the
recommendation that forecasting flash floods of the Northeast region of Bangladesh may be
possible if all the necessary required data as well as the cooperation from the Indian side is
available.
|
| Year | 1996 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-95-22 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Ammentorp, Hans Christian |
| Examination Committee(s) | Huynh Ngoc Phien;Tawatchai Tingsanchali |
| Scholarship Donor(s) | German Academic Exchange Service (DAAD) |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology |