Author(s): Mandar Bharat Gavali; Balaji Ramakrishnan

Linked Author(s): Balaji Ramakrishnan

Keywords: Navigation; Siltation; Dredging; Hydrodynamic; Morphological

Abstract: Mumbai being largest commercial city needs to be having multiple transport systems for goods and passengers. Thane Creek is well-capable of providing water transport from tip of Mumbai to Kasheli, but long-term feasibility of navigation channel of this waterway needs to be investigated as it encounters with heavy siltation. In this study, an attempt has been made to simulate the annual morphological changes occurring within Thane Creek, using a process-based hydrodynamic and morphological model called Delft3D. Initially hydrodynamic model is set-up, with its domain extending till offshore with astronomical tide forcing. Model coefficients are well-calibrated and validated with in situ measurement data captured by IITB. Morphological model is set-up using harmonic tide in order to avoid excessive computational time. After gaining results of model in agreement with the datasets of two different time scales, simulation is performed using optimal settings and creating new navigation channel of 3 m below chart datum. For better comprehension channel is divided into three zones according to width. Result shows that annual maintenance dredging quantity in the proposed channel is 0.414 million m3, demonstrates numerical model successfully and estimates the maintenance dredging quantity of navigation channel in Thane Creek.

DOI: https://doi.org/10.1007/978-981-97-6009-1_61

Year: 2022