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<br />Table 11-2. Classes of UDFC Alternatives <br /> <br />Class of Alternative UDFC Application <br /> <br />1. Alternatives of Objective <br /> <br />Provide 1, 2, 5, 10, 50 or 100 <br />year protection? Provide drainage <br />in all of city or only in selected <br />portions? etc. <br /> <br />, <br /> <br />2. Engineering Alternatives <br /> <br />Structural or non-structural pro- <br />grams? Pipes, channels, culverts, <br />bridges, detention basins or other? <br /> <br />3. Management Alternatives <br /> <br />Automatic Control? Diversions? <br />Transbasin transfers? Upstream <br />land management? Early warning <br />systems? Zoning? <br /> <br />4. Institutional Alternatives <br /> <br />Mostly a political problem. <br />Includes local or multijuris- <br />dictional solutions, financing, etc, <br /> <br />5. Timing and Size Alternatives <br /> <br />Best staging of construction and <br />implementation. Distribution of <br />sizes of facilities. <br /> <br />6. Location Alternatives <br /> <br />Location and configuration of UDFC <br />facility network. <br /> <br />. <br /> <br />22 <br />