Sediment Input Parameters Sample Clauses

Sediment Input Parameters. Sediment settling, erosion / resuspension as well as transport is simulated using the WAQ module of Delft3D. Relevant formulation are documented under section 13 of D-Water Quality Processes Library Description - Technical Reference Manual (Deltares 2021), in particular, Section 13.1 (Settling of sediment), 13.4 (Transport in sediment and resuspension), 13.10 (Calculation of bottom shear stress), For simulating sediment impacts the following general parameters will be assumed: ◼ Settling velocity – 0.5 mm/s ◼ Critical shear stress for deposition – 0.2 N/m2 ◼ Critical shear stress for erosion – 0.3 N/m2 ◼ Minimum depth where deposition allowed – 0.1 m ◼ Resuspension rate – 30 g/m2/d The above parameters have been used to simulate the impacts from sediment plumes in Hong Kong associated with uncontaminated mud disposal into the Brothers MBA (6), dredging for the Permanent Aviation Fuel Facility at Sha ▇▇▇▇ (7), dredging and jetting for the Development of an Offshore Wind Farm in Hong Kong (8) and the Additional Gas-fired Generation Units Project (9). The critical shear stress values for erosion and deposition were determined by laboratory testing of a large sample of marine mud from Hong Kong as part of the original WAHMO studies associated with the new airport at Chek Lap Kok. The same settling velocity of 0.5 mm/s was adopted in multiple approved EIAs in the vicinity which involved sediment dispersion modelling, including AEIAR-218/2018 Hong Kong Offshore LNG Terminal, AEIAR-212/2017 Improvement Dredging for Lamma Power Station Navigation Channel and AEIAR-152/2010 Development of a 100MW Offshore Wind Farm in Hong Kong.