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The total flow typically includes flow within the river, as well as across the floodplain areas adjacent to the river.For flood work applications that require a supporting Flood Study Report, the rural Floodplain Management Plan for the Macquarie Valley Floodplain 2020 typically requires consideration of the changes to peak flood flow distribution at a regional/floodplain scale. This is calculated as the percentage redistribution potentially caused by a proposed flood work. This information is used to ensure any redistribution of peak flood flows at a regional/floodplain scale is within acceptable limits (as specified in cumulative impact assessment criteria in the rural Floodplain Management Plan for the Macquarie Valley Floodplain 2020). 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