As part of SWSMP-III the SWMC has undertaken a hydraulic study to further develop and extend the Jamuna-Ganges-Padma (JGP) model by including Upper and Lower Meghna Rivers. The objective is to assess the trends in morphological development arising from already implemented scenarios as well as future interventions. Therefore the name, Jamuna-Ganges-Padma (JGP) model is changed to Jamun-Ganges-Padma-Meghna (JGPM) model to account the extension.

The JGPM model has been upgraded by incorporating the major tributaries inflows and distributaries outflows; another improvement has been in the boundary conditions, which now includes the dry season events also. Seven application scenarios with few options have been carried out to assess the trends in morphological changes in only the bed profiles over a long period (100 years).

Four 25-year simulations were run cumulatively to estimate trends in erosion and deposition patterns for a 100 year that might occur consequent to various proposed interventions in the river system and also to estimate effects of bed level changes on water levels.