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31 <br />additional assumptions upon which the impacts are determined. <br />The numerical portion of this task will concentrate on identifying, <br />to the extent practical, the direct and indirect economic implications in <br />each ASA, WRC region, and the Nation of those water deficiencies of <br />specified magnitudes and probabilities computed in task 3. <br />For each ASA, numerical estimates will be developed of the <br />direct and indirect effect of a given water deficiency on employment, <br />production, and population. <br />To supplement the numerical data available from previously com- <br />pleted Level B and Level C studies, a judgmental evaluation process will <br />be used to quantify systematically the relative economic impact of the <br />deficiencies. This technique will also be used to quantify the relative <br />environmental and soci: -.l impact of deficiencies. This judgmental - <br />evaluation process involves systematically rating, on a scale of 1 to 10, <br />the severity of the impact for a prespecified set of indicators. The <br />following are examples that coulc' be used: <br />o Population directly affected by the deficiency. <br />o Economic activity affected by the problem. <br />o Impact on viability of existing community. <br />o Impact on fish and wildlife habitats. <br />o Impairment of recreation quality. <br />o Impairment of scenic and wilderness areas. <br />Identification and Evaluation of Deficiencies and Impacts (Tasks 1 and 2 of <br />Component Two, Step 02A) -- Information will be developed to identify and <br />describe in a nationally consistent manner, the types of problems caused <br />by deficiencies in the nonvolumetric properties of water for each geographic <br />unit and for the assumed range of future conditions. As previously mentioned <br />these properties are: <br />o Surface area, depth and cross section <br />o Flow characteristics (flooding & low f low) <br />0 Aquatic Habitat (including water quality) <br />