USC FloodStudyUpdate Report - Flipbook - Page 251
Memorandum
TO:
Camden Council
FROM:
WMAwater
DATE:
30 October 2020
SUBJECT:
Upper South Creek Regional Model Framework
PROJECT NUMBER:
118112
1. INTRODUCTION
The Upper South Creek Regional Model User Guide accompanies
Upper South Creek flood model to consultants that propose to develop within the catchment. It outlines the
approach to the modelling and makes recommendations on methods to apply when completing flood
impact assessments for proposed development. This document has been reviewed and updated based on
feedback from Council and other consultants based on feedback received during two stakeholder
workshops.
2. BASE CASE AND PROPOSED CONDITIONS
This document refers to scenarios as follows:
The
.
The
revisions to reflect detailed survey or approved
development in the vicinity of the site (see Section 5.1 for more discussion).
The
3. XP-RAFTS METHODOLOGY
3.1. Overview
An XP-RAFTS hydrologic model has been developed for the Upper South Creek Catchment. The model
consists of fine resolution subcatchments in the urban areas, with larger broad-scale subcatchments in the
rural areas. This model is used to derive inflows into the TUFLOW model.
3.2. Subcatchment Delineation
Subcatchments have been delineated to provide inflows upstream of modelled pipes (such as culvert
crossings) and key hydraulic structures (such as dams). There are currently 1,474 subcatchments in the
model. Since any model over 1,000 nodes requires a higher licence level, the model has been split into 3
WMAwater Pty Ltd
118112: 201030_USC_Regional_Model_User_Guide_Final: 30 October 2020
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