Table 71 Mitigation Option Element Screening Element Type Strategy Elements Comment Assessed Pipe system upgrade Considered Pumps Not appropriate Soakage Pits Not appropriate Retarding Basin Considered Diversions Considered Floodways Not appropriate Measures Open Drain Not appropriate Considered on small scale to Channel Improvement compliment retarding basin works Bund Walls Not feasible Urban Structural Lot scale infiltration Not appropriate Lot scale detention Not appropriate Individual Property Floodproofing Possible, however very expensive Planning Scheme Amendments Considered Voluntary House Purchase Considered Measures Voluntary House Raising Considered Levees Not applicable Floodwalls Not applicable Floodways Not applicable Floodplain Modification Not applicable Measures Channel Improvement Not applicable Individual Property Floodproofing Not applicable Flood Storage Not applicable Structural Diversions Not applicable Rural Flood Warning Systems Not applicable Land Use Planning Not applicable Floodplain Education Programs Not applicable Purchase and Relocation Not applicable Information and Data Collection Not applicable Measures Planning Scheme Amendments Not applicable Non-Structural Regulation and Enforcement Not applicable Detailed Assessment Non-Structural Options The non-structural options considered for the economic assessment were voluntary house raising, voluntary house purchase and amendments to the planning scheme. Voluntary house raising was not considered further because it has limited application in this catchment, where many of the flood affected buildings cannot be economically raised. This is due in part to many vulnerable houses being of slab-on-ground construction. Voluntary house purchase was not considered viable because of the cost of the buy back and re-construction.
Table 71 Mitigation Option Element Screening Element Type Strategy Elements Comment Assessed Urban Structural Measures Pipe system upgrade Considered Pumps Not appropriate Soakage Pits Not appropriate Retarding Basin Considered Diversions Considered Floodways Not appropriate Open Drain Not appropriate Channel Improvement Considered on small scale to compliment retarding basin works Bund Walls Not feasible Lot scale infiltration Not appropriate Lot scale detention Not appropriate Individual Property Floodproofing Possible, however very expensive Measures Planning Scheme Amendments Considered Voluntary House Purchase Considered Voluntary House Raising Considered Rural Structural Measures Levees Not applicable Floodwalls Not applicable Floodways Not applicable Floodplain Modification Not applicable Channel Improvement Not applicable Individual Property Floodproofing Not applicable Flood Storage Not applicable Diversions Not applicable Non-Structural Measures Flood Warning Systems Not applicable Land Use Planning Not applicable Floodplain Education Programs Not applicable Purchase and Relocation Not applicable Information and Data Collection Not applicable Planning Scheme Amendments Not applicable Regulation and Enforcement Not applicable Detailed Assessment Non-Structural Options The non-structural options considered for the economic assessment were voluntary house raising, voluntary house purchase and amendments to the planning scheme. Voluntary house raising was not considered further because it has limited application in this catchment, where many of the flood affected buildings cannot be economically raised. This is due in part to many vulnerable houses being of slab-on-ground construction. Voluntary house purchase was not considered viable because of the cost of the buy back and re-construction.
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