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~ IE': ~: I-IO. I-ll. I-l2. I-13. , W,\\{ '0' WORK ELEMENT J. TASKS: J-1. J_2. J_3. J-4. J..,5. J';'6. J-iT. J..,8. J";g. J-10. J-l1. J-12. J-l3. J-i4. J-15. J-i6. I-6. I-T. I-B. I-g. Table 5 (continued) WORK ELEMENTS AND TASKS Encode land use data Debug land use data Develop flood elevation/frequency relationships Determine damage potential for 'existing condi- tions and each management alternative Determine cost of each alternative EValuate costs and benefits Prepare displays Prepare report DETERMINE ADVERSE EFFECTS OF FUTURE DEVELOPMENT IN SHEEP DRAW, FOSSIL CREEK, AND SPRING CREEK WATERSHEDS AND IDENTIFY AND EVALUATE ALTERNATIVE METHODS OF PREVENTING ADVERSE EFFECTS. Obtain cross-section data Subdivide watersheds Estimateexisting,1ariltratioD rates Determine existing imperviousness ratios Develop alternative (2) future land use patterns Determine future imperviousness ratios Determine 2-, 10-, 50-, 100-, and 500-year discharge, profiles for existing conditions and each alternative land use pattern Evaluate' effects on the main stem - Develop lOO-year ,and 500-year flood outlines for existing conditions and each alternative land use pattern Locate potential detention reservoirs Determine 2-, 10-, 50-, 100-, and 500-year discharge profiles under future conditions with detention reservoirs Develop lOO-year and 500-year flood outlines with detention reservoirs Evaluate effectiveness of detention reservoirs Identify and evaluate alternative methods of preventing future flood hazards Prepare displays Prepare report 30