The Bangladesh Army (24 Engineer Construction Battalion - ECB) has undertaken a project aimed at optimizing the safe transportation of Jet A-1 fuel to the Kurmitola Aviation Depot (KAD). DSGS conducted a detailed bathymetric survey and hydrological Modelling in Sitalakhya River near Pitalganj Depot.

Bathymetric Survey

A detailed bathymetric survey was carried out over a 12-kilometer stretch of the Shitalakhya River in the vicinity of the proposed jetty site. The survey included 190 cross-sections. Within the critical 2-kilometer zone surrounding the jetty, high-density measurements were taken at 20-meter intervals to accurately capture riverbed features. For the upstream and downstream areas beyond this core zone, a lower measurement density (at 100 to 200-meter intervals) was applied. The primary objective of the survey was to develop an accurate riverbed profile to support dredging plans and the engineering design of the jetty.

Hydrological Modelling

A comprehensive two-dimensional hydrodynamic modeling study was undertaken to assess both current and projected flow conditions around the project site. The analysis included bed-level variation assessments and simulations under various hydrological scenarios, including low flow, average flood, and extreme flood events. The results have been documented in the Final Report, serving as a key reference for decision-making regarding the proposed jetty location.

•   Morphological data collection/analysis
•    Analysis of collected cross-sectional data
•    Planform analysis of the river near jetty
•    Hydrological data analysis
•    Seasonal hydrological patterns
•    Monsoon dominance (june-september)
•    Dry season characteristics (january-march)

•    Model development
•   Development of two-dimensional (2d) hydrodynamic models
•   Generation of synthetic flood hydrograph using hydrographs
•   Simulation of average (2.33-year return period) flood
•   Simulation of extreme (100-year return period) flood
•   Comparison of model findings Dredging assessment