Water

Low risk of spill as Hume levels fall

by
November 14, 2017

On the move. . .Lake Hume levels are falling as water is released for irrigation and the environment.

The resource manager for northern Victoria has declared a low risk of spill in the Murray system.

Mark Bailey said the risk of spill in the Murray system during 2017-18 was now below the 10 per cent threshold needed for a declaration to be made.

‘‘Based on Victoria’s share of the volume held in Lake Hume, the risk of spill is about three per cent,’’ Dr Bailey said.

‘‘The declaration follows relatively low inflows during October. Lake Hume is now slowly falling as releases for downstream irrigation and environmental demands occur.

‘‘No spills occurred from the Victorian share of Lake Hume during October.

‘‘All water remaining in spillable water accounts in the Murray system will be made available to entitlement holders for use or trade.’’

The risk of spill in the Campaspe system during 2017-18 remained above the 10 per cent threshold needed to declare a low risk of spill.

‘‘The risk of spill from Lake Eppalock in the Campaspe system is about 17 per cent,’’ Dr Bailey said.

‘‘No spills have occurred from Lake Eppalock so far this year.’’

Dr Bailey said the risk of spill assessment did not describe the chances of flooding this season.

‘‘The risk of spill is a water accounting assessment,’’ Dr Bailey said.

It does not refer to flood risks downstream of the storages.’’

Allocation trade from NSW to Victoria is limited to the lesser of a net annual volume of 200Gl or a volume that keeps the risk of spill in the Murray system below 50 per cent.

The current risk of spill limit allows 200Gl of net trade from NSW to Victoria.

Customers participating in the water trading market can monitor trade availability on the water register website.

The risk of spill in the Campaspe system will be updated on Monday, December 11.

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