Halda, a major tributary of Karnaphuli River is the only source of naturally fertilized eggs of carp fishes in South Asia and a great pioneer to the national economy. However, due to overexploitation of the physical resources, the river is becoming a less favorable place for aquatic life. Excessive dam construction, sand mining, brick kilns alongside the river and water withdrawal for irrigation purposes in the dry season are continuously degrading the river conditions. Hence, it is essential to study the changing trends and identify the primary reasons behind extreme degradation in the water body of the river. To study the alterations in Halda River, a hydrological trend analysis was carried out to learn the temporal changes in river planform, water level changes and seasonal fluctuation. Moreover, a number of FGD and KII has been conducted at the surrounding locations of the river to acknowledge the problems faced by the local community. Finally, a public-private partnership model is recommended to ensure the sustainable usage of physical resources in the river. The model aims to prove a smooth partnership between the public and private sector ensuring the sustainability of the Halda River.