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Morphological impact assessment and navigational and manoeuvring study
Reliance Industries Ltd (RIL) wanted to increase the material handling capacity at its Reliance Dahej Marine Terminal (RDMT). Currently, RDMT operations are restricted due to heavy siltation especially at the berthing pocket of the jetty. The existing navigational channel depth only allows smaller vessels to manoeuvre due to available draft depth limitations. Thus, the need for intensive dredging works arose in order to revamp the jetty and permit larger ships to enter and exit the area. However, the project site boasts of complex hydrodynamics. It was necessary to accurately predict the infill rate of the dredged navigational channel. With our integrated hydraulic/hydrodynamic modelling and navigation/manoeuvring studies, we supported RIL with its dredging and expansion plans.
Navigational and morphological aspects along with dredging requirements demanded the need for an extensive studyRDMT is located at the mouth of the Narmada River in the Gulf of Khambhat, India. It lies adjacent to RIL’s Reliance Dahej Manufacturing Division (RDMD). RDMT handles shipments of raw material/products for petrochemical plants of RDMD and its existing jetty has been operational since 1996. However, gradual and excessive siltation has occurred in the RDMT berthing pocket. In order to manoeuvre larger vessels at the RDMT jetty, a higher draft is needed – in the navigational channel, berthing pocket as well as in the turning circle. As a result, an extensive capital dredging becomes necessary. The allocated disposal site for dredged material is close to the development site. Thus, an extensive study is required in order to assess the back filling rate and volume due to the complex hydrodynamic conditions at the project site. As a result, a huge capital dredging exercise becomes necessary. The allocated disposal site for dredged material is close to the development site.
Providing solutions to a complex problem – assessing morphological impactsAt DHI, we can accurately estimate potential siltation rates, owing to our vast experience in hydrodynamics and morphological modelling. Our MIKE 21 Mud Transport (MT) model is well known in the industry for predicting potential infill rates of dredged navigational channels. With MIKE 21 MT, we can precisely simulate capital dredge volumes as well as annual maintenance dredging required for the same. Thus, the client approached us to conduct an indepth morphological assessment of the impacts of the planned dredging operations in the channel.
The lack of good quality datasets was an impediment to our work. We used our in-house expert views to overcome the data deficiency and assess the outcome of model simulations.The Gulf of Khambhat – where the site is located – is famous for tidal amplification and turbidity maxima. It is a challenging environment for calibration of hydrodynamic and sediment transport models. We met these challenges successfully and provided the following services:
Navigation and manoeuvring studies
Along with FORCE Technology, Denmark, we conducted several navigation and manoeuvring studies, simulations and mooring loads assessments. The services we provided included:
We build confidence and help drive the dredging project forwardThanks to our global knowledge and vast experience, RDMT now has a thorough understanding of the complex hydrodynamics of the dredging site. This empowers them to conduct the dredging activity more efficiently, effectively reducing operational and maintenance costs. Moreover, RDMT’s plans to expand cargo handling facilities and handle larger cargo ships in the future are on the road to realisation, thanks to our in-depth navigational and manoeuvring modelling studies.
Reduced maintenance and operational costs
Facilitation of optimal navigation & manoeuvring of ships
Efficient future handling of more material
Reliance Industries Limited (RIL)
MIKE 21 Mud Transport (MT)
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