Model input Clause Samples
Model input. This section explains which values for different input parameters are used in the different situations. Four situations are simulated, Min-max As-Is, Min-max To-Be, Lead-time As- Is and Lead-time To-Be. For every situation the input parameters are specified. All four situations are simulated under the same utilization rates. It obvious that in the Min-max As-Is and Min-max To-Be the Min-max model is used and in the Lead-time As-Is and Lead-time To-Be the Lead-time model.
Model input. 2.1 Key input to the near-field model include: • Outfall diffuser configuration • Ambient current speed • Vertical density profile • Effluent flow rate
2.2 Details of the outfall diffuser configuration adopted for the near field modelling are given in Table A5- 1-1. Attachment 1 shows the submarine outfall of SCISTW. Modelling diffuser length (m) 1200 Outfall diameter (m) 3.24 Riser separation (m) 52 No. of risers 24 Riser height (m) 1.5 Ports per riser 8 The horizontal angles of discharge for 8 ports are 0o, 45o, 90o, 135o, 180o, 225o, 270o and 315o. Riser radius (m) 0.13 Port diameter (m) 0.25 Port diameters ranges from 0.225m to 0.275m. An average value of 0.25m is adopted for modeling.
2.3 Vertical density profiles were derived for the SCISTW outfall under the EEFS using the data from EPD’s routine water quality monitoring for the period from 1994 to 2002. Four density profiles were available from the EEFS for one dry season profile (D1) and three wet season profiles, representing three degrees of wet season stratification, namely W1, W2 and W3 respectively. Table A5-1-2 shows the density profiles for D1, W1, W2 and W3 and their probabilities of occurrence. Details of the vertical density profiles are given in the “EEFS Working Paper No. 7”. Based on the EEFS, the total water depth was assumed to be 17 m. 1 22.14 19.99 17.23 15.45 2 22.20 20.03 17.35 15.65 3 22.21 20.12 17.59 16.08 4 22.22 20.26 17.81 16.60 5 22.25 20.39 18.07 17.14 6 22.27 20.60 18.48 17.78 7 22.27 20.86 18.99 18.54 8 22.29 21.08 19.34 19.36 9 22.29 21.27 19.71 20.02 10 22.29 21.39 19.92 20.39 11 22.29 21.39 20.43 20.99 12 22.32 21.39 20.65 21.26 13 22.32 21.39 20.65 21.26 14 22.32 21.39 20.65 21.26 15 22.32 21.39 20.65 21.26 16 22.32 21.39 20.65 21.26 17 22.32 21.39 20.65 21.26 2.4 Measurements of ambient current velocity were conducted under the EEFS. The current data were analyzed for different vertical depths under the EEFS and were calculated as 10, 50 and 90 percentile values for both dry and wet seasons, namely V10, V50 and V90 respectively as shown in Table A5-1-