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Identification

Field Value

Title

Griffith Major Overland Flow Floodplain Risk Management Study and Plan For CBD Catchments

Abstract

The recommended Floodplain Risk Management Plan for the Griffith CBD catchments has been prepared in accordance with the NSW Floodplain Development Manual (Reference 6) and: * Is based on a comprehensive and detailed evaluation of all factors that affect and are affected by the use of flood prone land; and * Provides a long-term path for the future development of the community.

Griffith is located approximately 450 km north of Melbourne and 560 km west of Sydney in the heart of the Murrumbidgee Irrigation Area (MIA). The CBD and residential areas of Griffith are located at the base of the McPherson Ranges (see Figure 1). Griffith and its surrounding villages of Yenda, Yoogali, Hanwood, Bilbul and Beelbangera lie within the Main Drain ā€œJā€ catchment, which together with its network of drainage channels delivers runoff to Mirrool Creek.

The Griffith CBD catchment has an area of approximately 9 km2. The upper part of the catchment is steep and covered in scattered timber and bushland. South of the bushland area the urban area begins and continues south to Wakaden St and the Temora-Roto Railway Line. This area is predominantly low density residential development. Griffith CBD lies to the south of the railway line, and is characterised by commercial and light industrial land uses. At the downstream extents of the CBD is the Main Canal which is raised above normal ground levels and is consequently a substantial obstruction to overland flow.

The City of Griffith is not located on the banks of a major river system and therefore does not experience mainstream flooding as occurs at other centres within the Murrumbidgee River catchment for example Wagga Wagga. However, Griffith and its surrounding areas are affected by high volume rainfall events and also from flooding from the Main Drain J system.

In the past, frequent flooding has occurred throughout the commercial areas of Griffith including Yambil Street, even in small rainfall events less than the 6 month ARI for example. Studies have indicated that this flooding has been due to a combination of catchment runoff, blockage and/or insufficient capacity of the sub-surface drainage systems and the associated siphon drainage systems, as well as the elevated railway and canal embankments that impede downstream overland flow paths. Within the study area flows are predominantly distributed and shallow at the upstream or northern sections of the CBD catchment and runoff generally ponds behind the various embankments that tend to be aligned normal to general flow direction such as the Main Canal and railway line, before being gradually discharged through the siphon outlets located under the Main Canal at the downstream boundary of the study area. The Flood Study (Reference 1) also found that the actual flow at the siphons was largely restricted by the upstream drainage system.

Resource locator

Griffith Major Overland Flow Floodplain Risk Management Study and Plan For CBD Catchments - Report

Name: Griffith Major Overland Flow Floodplain Risk Management Study and Plan For CBD Catchments - Report

Protocol: WWW:DOWNLOAD-1.0-http--download

Function: download

Unique resource identifier

Code

d01032b8-ea73-4d59-9502-b5526c6451c1

Presentation form

Edition

28/03/2018

Dataset language

English

Metadata standard

Name

ISO 19115

Edition

2016

Dataset URI

https://datasets.seed.nsw.gov.au/dataset/d01032b8-ea73-4d59-9502-b5526c6451c1

Purpose

Land and Resource Management

Status

On going

Spatial representation

Type

vector

Spatial reference system

Code identifying the spatial reference system

4283

Classification of spatial data and services

Field Value

Topic category

Keywords

Field Value

Keyword set

keyword value

Originating controlled vocabulary

Title

ANZLIC Search Words

Reference date

2008-05-16

Geographic location

West bounding longitude

146.02169

East bounding longitude

146.079712

North bounding latitude

-34.299912

South bounding latitude

-34.277787

NSW Place Name

Griffith

Vertical extent information

Minimum value

-100

Maximum value

2228

Coordinate reference system

Authority code

urn:ogc:def:cs:EPSG::

Code identifying the coordinate reference system

5711

Temporal extent

Begin position

End position

N/A

Dataset reference date

Resource maintenance

Maintenance and update frequency

As needed

Contact info

Contact position

Data Broker

Organisation name

Griffith City Council

Full postal address

admin@griffith.nsw.gov.au

Email address

admin@griffith.nsw.gov.au

Responsible party role

pointOfContact

Constraints related to access and use

Field Value

Limitations on public access

Responsible organisations

Field Value

Responsible party

Contact position

Data Broker

Organisation name

Griffith City Council

Full postal address

admin@griffith.nsw.gov.au

Email address

admin@griffith.nsw.gov.au

Responsible party role

pointOfContact

Metadata on metadata

Field Value

Metadata point of contact

Contact position

Data Broker

Organisation name

Griffith City Council

Full postal address

admin@griffith.nsw.gov.au

Email address

admin@griffith.nsw.gov.au

Responsible party role

pointOfContact

Metadata date

2024-03-25T06:42:22.171890

Metadata language