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Cover Level - The ground level (above datum) and the level where flooding is reported. An overflow or spillway crest level may be specified at a lower level as part of the outlet control details. If a ground model (TIN) is Surface Data is present the Cover Level will automatically be picked up from the centre of the icon. Above the Cover Level, water will be stored above the ground and then allowed to drain back into the network. The default ponding area used for the flooded volume is 1000 m².

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