Management of Menindee Lakes 2011-2012 – Issue 8. 20 April 2012

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The flood peak in the Darling River is currently entering the Menindee Lakes. Inflows of 64,000 megalitres per day (ML/d) have been recently calculated and inflows of over 50,000 ML/d day are expected to continue over the weekend before beginning to fall. Airspace in the lakes is being used to minimise the flood impact around the  Menindee township and downstream. Upstream at Wilcannia the river is falling slowly and no further rises are anticipated for this event.

This paper, and updates to follow, describes current flow conditions and operations, as well as information on what
can be expected through April and May as the flood waters pass through the Darling River system.
Residents and authorities are reminded to check with the NSW Office of Water in Buronga on the required
approvals before undertaking any earthworks to protect infrastructure or crops.
 

Management of Menindee Lakes 2011-2012 Issue 7 – 5 April 2012

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Introduction
The flood peak in the Darling River is now approaching Wilcannia. Upstream at Tilpa the river level is falling and no
further rises are anticipated in this event. Downstream at Menindee, high inflows to the lakes system are expected
throughout April and into May, however, maximum outflows will be limited to current levels. The NSW Office of
Water and State Water Corporation are continuing to manage operations at Menindee Lakes in anticipation of the
forecast inflows.
This information paper updates current flow conditions and operations, as well as provides information on what can
be expected through April and May as the flood waters pass through the Darling River system.
In short, residents along the Darling River, from downstream of Tilpa to Burtundy, can expect an extended period of
high flow and widespread rural inundation, similar to events of 1971, 1990 and 1998.
Residents and authorities are reminded to check with the NSW Office of Water in Buronga, approvals that
might be necessary before undertaking any earthworks to protect infrastructure or crops.

River Operations
Darling River Flows and Menindee Storage Volume
The flow in the Darling River main channel at Wilcannia is currently at 39,000 megalitres per day and the flow in the
Talyawalka Creek is over 50,000 megalitres per day. This combined flow is expected to approach a maximum of
about 100,000 megalitres per day over the next few days causing major flooding. This is slightly lower than the
early forecasts but comfortably within the range of planning expectations.
Downstream at Menindee, releases from the lakes system have been made in preparation of the anticipated
significant inflows. The lakes are currently 82 percent full and can hold a further 600,000 megalitres under
surcharge conditions. A large proportion of this available airspace will be used to manage forecast inflows of
between 60,000 and 70,000 megalitres per day during April.
The main weir gate has been re-positioned in the water to limit outflows (measured at Weir 32) to a maximum of
35,000 megalitres per day, making town flooding and conditions immediately downstream of Menindee no more
severe than what is currently being experienced. This will also cause lake levels to rise throughout April and May.
The NSW Office of Water will aim to begin reducing outflows from the lakes as soon as possible to allow water
levels to fall and alleviate flooding in the Menindee town area and downstream. However this is not expected until
May. Minimising outflows will also ensure that the lakes are full at the end of this flood event to provide maximum
resource availability into the future.
Lower Darling River Flows
Downstream flooding could be similar to that experienced during the 1998 flood which had a comparable peak flow
at Bourke of 230,000 megalitres per day (13.78m gauge height). Menindee releases to the Lower Darling in that
event reached 46,500 ML per day through Weir 32 (7.45m gauge height or 10.0m at the Menindee Town gauge).
The targeted peak flow for this 2012 event is 35,000 megalitres per day through Weir 32 and with flows from the
Talyawalka, combined flows in the Lower Darling immediately downstream of the Menindee Lakes will be as high
as 50,000 megalitres per day. Historically, flows of this size, generally flow evenly to the Lower Darling and the
Great Anabranch.
As far as possible the NSW Office of Water will reduce lake outflows at the time of peak Talyawalka inflows below
Weir 32 to minimise the influence of the Talyawalka on the Lower Darling. If that can be achieved then a flow pulse
of 22,000 - 24,000 megalitres per day in the Lower Darling will not be experienced but rather steady flow conditions
of around 18,000 to 20,000 megalitres per day produced by the Menindee outflows for the past few weeks, will be
seen.
Water levels in the Lower Darling River at Pooncarie and Burtundy are both rising very slowly. The NSW Office of
Water will aim to keep peak flow in the Lower Darling below that of the 1998 event, and no more than about 24,000
ML per day (7.7m gauge height) at Pooncarie and 22,000 ML per day (7.7m gauge height) at Burtundy.
Great Darling Anabranch Flows
Flow in the Lower Darling at the Great Anabranch effluent has been relatively steady throughout March at around
18,000 megalitres per day, commensurate with the steady flows through Weir 32. In the Anabranch at Wycot the
flow gradually rose through March to reach 13,000 megalitres per day and some 4.2 metres. At the peak of flow,
expected in late April/May, levels are not expected to exceed 5.2 metres. A few thousand megalitres per day is now
flowing in the lower reaches of the Anabranch and joining the Murray River. It is anticipated that this full
connectivity through the Anabranch system will last at least through May, with significant flow volumes expected to
reach the Murray River.
Combined Murray and Murrumbidgee River Flows
The flood peak in the Murrumbidgee River is current downstream of Hay where the river is now falling from 12.9
metres. Peak flow of around 40,000 megalitres per day is expected at Balranald next week. This water will then
enter the Murray River and produce flows at Euston Weir of up to 60,000 megalitres per day from mid April.
It is expected that the Murray peak flow will pass Wentworth in mid to late April with the Darling River contributing
steadily flows of around 18,000 to 22,000 megalitres per day during this period. Flows from the Great Darling
Anabranch will be much longer in arriving at the Murray and have minimal impact on peak flows.
It is expected that high flows to South Australia will persist from mid-late April to early

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Daily Rainfall at Charleville Office June 2011 to January 2012

Daily Rainfall at Charleville Office June 2011 to January 2012
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Rainfall and Water Flows

Fire - Preparation and Management Workshops

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Join South West NRM with presenters Paul Storrs and Shane Brumby of the Rural Fire Service along with Bruce Alchin.
 

South West NRM Workshops to be held at:

Morven - June 12th Town Hall

Augathella - June 13th Town Hall

Charleville June 14th RSL, Watson Street

Quilpie - June 15th Bulloo Park (Showgrounds)

Thargomindah - June 16th Town Hall

Eulo - June 17th Town Hall

Cunnamulla - June 18th Shire Hall, Supper Room

Bollon - June 19th Tennis Club

 

-Preparation for Bushfires
-Fire Permits
-History of Fire
-Healthy Waters Management Plan
-Fire in the Rangeland Ecosystem
-Fire and Property Management
-Fuel Dynamics
-Meteorological Conditions

 

RSVP  - 07 4656 8500

admin@swnrm.org.au

Or contact your local SWNRM office for more information.

 

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Community Information Sheet: Issue 9 Management of Menindee Lakes 2011-2012

Abstract or description: 

After almost three months travel time, the flood peak in the Darling River has arrived at the Menindee Lakes.Inflows of nearly 60,000 megalitres per day were experienced during the third week of April, but are now falling and have now reduced below 40,000 megalitres per day. Airspace in the lakes minimised the flood impact around Menindee township and downstream. Upstream at Wilcannia, the river is falling steadily and no further rises are anticipated from this event.

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Flow Reports
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Waterways management documents
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"Business diversity meets Biodiversity" SWNRM Project application successful

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BIODIVERSITY FUND ROUND ONE  South West NRM Project

 

This project aspires to create an innovative & holistic natural resource management consortium initially across 7 properties (339,882 ha's) conserving a range of Threatened Ecological Communities (TEC's), whilst cognisant of developing properties under diverse agricultural, cultural heritage & conservation enterprise outcomes. TEC areas mapped under the Federal Government's TEC program, form a catalyst for on-ground projects, creating nodes of biodiversity, linking TEC's through corridors where vegetative communities allow. The project aspires to protect & strategically manage 17,500 ha's of TEC over 6 years costing of $109.00 / ha (inclusive of GST), promoting project outcomes through case study development & promotion.

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Biodiversity Fund helps Australia's land managers store carbon and protect biodiversity

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317 projects around the country will benefit from the first round of the Gillard Government’s Biodiversity Fund.

 

The Biodiversity Fund is a key component of the Gillard Government’s strategy to enhance biodiverse carbon stores and secure a clean energy future for Australia.

Announcing the first round of Biodiversity Fund grants, Minister for the Environment, Tony Burke and Minister for Climate Change, Greg Combet said the 317 projects would help to revegetate, rehabilitate and restore around 18 million hectares of the Australian landscape over the next six years.

Collectively these projects have real potential to advance the reversal of biodiversity decline and establish significant areas of carbon storage. They are an important first step in connecting our landscapes and making them more resilient to climate change.

Minister Burke said the Biodiversity Fund would provide much needed long-term commitment to biodiversity conservation and restoration with almost half the projects announced today running over a six year period.

“Providing long-term support to land managers leads to enduring results for our environment and for the community,” Mr Burke said.

“Across Australia, farmers and other land managers already do a great job through Landcare work and the Biodiversity Fund will build on this work.

“A number of projects announced in this first round also align with the intent of the draft National Wildlife Corridors Plan helping to improve connectivity in the landscape through the establishment of landscape scale wildlife corridors.

“This program has received overwhelming support from land managers right across the country with the Biodiversity Fund encouraging an additional $207 million in in-kind or financial contributions.”

In Queensland the Biodiversity Fund will support a project to restore the Condamine catchment landscape in collaboration with the local community.

In South Australia, the Fund will provide $2.6 million to rehabilitate South Australia’s remnant coastal corridor, the Samphire Coast, over the next six years.

The Fund will also support a project to protect Victoria’s iconic River Red Gums and restore native vegetation along the Hopkins River.

Minister Combet said just over a third of the Biodiversity Fund projects indicated that they may go on to participate in the Carbon Farming Initiative.

“These policies will help to protect biodiversity on the land, boost carbon storage opportunities and improve the resilience of unique species against the impacts of climate change,” Mr Combet said.

“The Biodiversity Fund is an important part of the Government’s Clean Energy Future plan and is supported by revenue from the carbon price. It focuses directly on taking action on-ground to maintain the productive capacity of our landscape and natural ecosystem.”

For more information about Biodiversity Fund, and for a list of successful projects, go to http://www.environment.gov.au/cleanenergyfuture/biodiversity-fund/index.html

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Making the most of good seasons - youtube video

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We thought you might have been interested in this YouTube video on managing Mitchell grass produced by us (Dept Agriculture, Fisheries and Forestry) and Desert Channel.  It is based on a field day held in  Barcaldine late last year.

The main theme is making the most of good seasons by: increasing stock numbers in some paddocks; spelling other paddocks to improve condition; being ready for the inevitable drought de-stocking.

 

Please feel free to circulate this link around to your contacts, especially those with Mitchell grass country. We are trying to make our information available to as many graziers as possible and overcome the issue of not everyone being able to get along to every field day or workshop that is held. Having the information summarised on YouTube should make it more accessible to a wider audience.

 

http://www.youtube.com/user/DesertChannels

 

For more information contact

 

Dr David Phelps
P.O. Box 519, Longreach Qld 4730
Telephone 07 46501244

Mob 0427270259
Email david.phelps@deedi.qld.gov.au

NSW response to the Murray Darling Basin Plan: April 2012

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Please find attached summary of the NSW Government submission on the proposed Murray Darling Basin Plan.

For more information, please visit the NSW Office of Water website at www.water.nsw.gov.au or contact Ms Bunty Driver on 0407 403 234.

NSW Government submission on the
proposed Murray Darling Basin Plan
Community information
INTRODUCTION
The NSW Government recognises the importance of creating a sustainable working Murray Darling Basin. This is demonstrated through our ongoing commitment to the 2004 National Water Initiative, and the 2008 Intergovernmental Agreement
NSW has been a leader in water reform over the past 25 years, working with communities, industry and environmental groups to ensure that businesses and communities are able to successfully adapt to change.
The Murray Darling Basin Authority released its proposed Murray Darling Basin Plan (the draft Plan) for public comment on 28 November 2011. The NSW Government Submission on the Murray Darling Basin Plan (the NSW Submission) provides comment to assist the MDBA in developing a final Basin Plan that will achieve optimal outcomes for the environment and NSW communities.
The NSW Submission also highlights the need to develop parallel processes with Commonwealth agencies to address essential NSW concerns regarding the implementation of the Basin Plan, including agreement on Commonwealth funding for State implementation costs and structural adjustment for affected communities.

Information Paper Menindee Lakes water saving opportunities: April 2012

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The Menindee Lakes water storage scheme is a complex system in far-west New South Wales. The scheme was built for water storage, and whilst this is still its primary purpose, it is now managed as a multi-purpose resource.
The Menindee Lakes also has high environmental and cultural values and is a focus for tourism and recreation in far-west of the State.

Not only is the management of the lakes complex in its own right, but it is also part of the equally complex water sharing arrangements of the Murray-Darling Basin Agreement.
Everyone who has ever heard of the Menindee Lakes seems to have an opinion as to how the lakes should be managed and typically, the opinions expressed reflect particular interests and perspectives.
The purpose of this paper is to give a brief overview of the Menindee Lakes, how they are currently managed, and how management and operations need to consider a complexity of issues.
Importantly, the paper outlines the reasons the NSW Government does not support the changed operations of the lakes proposed by the Commonwealth Government, that was recently the subject of a Memorandum of Understanding between the Commonwealth and NSW Governments.
The Menindee Lakes storage scheme
The Menindee Lakes storage is a series of nine natural lakes, part of the Travellers Lake System adjacent to the Darling River in far-west NSW.
In the early 1950s and 1960s, the NSW Government constructed the Menindee Lakes water storage scheme by connecting the natural lakes and Darling River by a series of weirs, regulators, inter-connecting channels and levees.
When full, the storage scheme has a surface area of 453 square kilometres and stores 1,731,000 megalitres at full supply level.
It is also one of only two storage systems in inland NSW that can be surcharged during floods, although levels must be reduced to full supply level as soon as possible after the peak of the flood has passed.
The initial purpose of the storage scheme was to secure water supply for Broken Hill and to foster economic development in far-west NSW through irrigation. The lakes have subsequently been used to supply water to Victoria and South Australia under the Murray-Darling Basin Agreement.
The Menindee Lakes scheme is owned and maintained by the NSW Government.
Each year the Murray-Darling Basin Authority pays NSW $320,000 and three-quarters of the costs of operations and maintenance.