Study Objectives
Snowy Valleys Council commissioned the Floodplain Risk Management Study and
Plan for the township of Adelong. The overall objectives of the Floodplain Risk Management
Study were to assess the impacts of flooding, review existing Council policies as they
relate to development of land in flood liable areas, consider measures for the management of
flood affected land and to develop a Floodplain Risk Management Plan which:
- Proposes modifications to existing Council policies to ensure that the development of
flood affected land is undertaken so as to be compatible with the flood hazard and risk.
- Proposes Flood Planning Levels for the various land uses in the floodplain.
- Sets out the recommended program of works and measures aimed at reducing over
time, the social, environmental and economic impacts of flooding.
- Provides a program for implementation of the proposed works and measures.
The Floodplain Risk Management Study focuses on Main Stream Flooding from Adelong Creek, Black Creek, Tanyard Creek, Golden Gully and an unnamed tributary that joins the creek opposite the extension of Gundagai Street, Minor Tributary Flooding which occurs as a result of the surcharge of the minor gullies that drain the rural areas which border the town, and Major Overland Flow which occurs in the developed parts of Adelong.
Study Activities
The activities undertaken in this Floodplain Risk Management Study and Plan included:
- Review of flooding patterns at Adelong for flood events up to the Probable Maximum Flood, as determined in the Adelong Flood Study which was adopted by Snowy Valleys Council in 2014.
- Undertaking a consultation program over the course of the study to ensure that the Adelong community was informed of its objectives, progress and outcomes.
- Assessment of the economic impacts of flooding, including the numbers of affected properties and estimation of flood damages.
- Review of current flood related planning controls for Adelong and their compatibility with flooding conditions.
- Strategic review of potential floodplain management works and measures aimed at reducing flood damages, including an economic assessment of several measures.
- Definition of flooding behaviour at Adelong for a flood with an AEP of 5 per cent.
- Ranking of works and measures using a multi-objective scoring system which took into account economic, financial, environmental and planning considerations.
- Preparation of a draft Floodplain Risk Management Plan for Adelong.
