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1 Introduction <br /> This report, presenting the preliminary stormwater mitigation analysis of River Islands Phase 2, is a <br /> continuation of the River Islands Phase 1 Stormwater Mitigation report dated April 2020. Phase 1 lakes <br /> are included in the modelling as described in section 2 and section 3 . Results for phase 1 lakes are <br /> however not presented in detail in this report. Part of the information presented in this section and other <br /> sections of this report are updated and/or revised information of Phase 1 to include the additional <br /> information relevant for Phase 2 of the River Islands development. <br /> 1.1 A Note on Nomenclature of River Islands' Areas <br /> During the development of River Islands, there have been a number of different area divisions and <br /> nomenclature for the different Phases. In Figure 1-1, Figure 1-2 and Figure 1-4 on the following pages, <br /> this nomenclature is shown graphically. <br /> The general division based on the initially hydrologic system design of the area is the division into <br /> Watershed A, B and C. Initially there was three (3) stormwater evacuation pump stations (A, B and C) <br /> planned, each evacuating the stormwater runoff from lakes in Watershed A, B and C respectively. The <br /> most recent design reduced the number of stormwater evacuation pump stations to two (2) thus removing <br /> the hydrological correlation for the division into watershed A, B and C. While no longer adhering to three <br /> (3) separate pump stations, references to watersheds A, B and C, as well as to Watershed A, B and C <br /> lakes, are still used throughout this report. <br /> Phase 1 and 2 is a division derived from the sequence of construction (or anticipation thereof). The <br /> division of Phase 1 into Stage 1, Stage 2A and Stage 2B is also derived from the order of construction. <br /> Note that the layout of lakes, roads and other infrastructure in Phase 2 may not be the most recent in the <br /> below Figures as the figures are included for the purpose of showing area boundaries only. <br /> 42 <br /> 41 <br /> a , <br /> ,s 11 2 <br /> 7 W4 <br /> „s 2. z, <br /> 17 <br /> a, <br /> WATE RSH EQS a, <br /> UWE" <br /> Figure 1-1: Watershed Division of River Islands Development <br /> River Islands Phase 2 Stormwater Mitigation Rev 2 3 <br /> PACE <br />