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11 <br />GEOGRAPHICAL DETAIL <br />The 1975 Assessment, in order to accommodate other planning <br />endeavors of the U.S. Water Resources Council and its member agencies, <br />will identify, describe, and evaluate water - related problems that mani- <br />fest themselves at several levels of geographical detail. <br />These levels range from relatively small areas, such as, metro- <br />politan areas, Standard Metropolitan Statistical Areas (SMSA) and WRC <br />Subareas to larger areas, such as, aggregated subareas (ASA) regions, <br />waterfowl flyways, States, groups of States, or even groups of WRC <br />Ptegions. However, for systematic rating of problem severity and urgency, <br />the Nation (including the shoreline and the Continental Shelf) will be divided <br />into geographic units, at the ASA level shown in Figure 3. This figure <br />does not include geographic units for WRC Regions without Framework <br />Studies; these units will be defined for use in the four -step assessment <br />process in an early stage of preparing Regional Work Plans. Geographic <br />Units for the Continental Shelf will be defined prior to initiation of the <br />Step 02 analysis. <br />Water requirements, supplies, and deficiencies for the Nationwide <br />Adequacy Analysis (Step 02A) will be determined for each geographic unit. <br />If existing data bases do not conform to these geographic unit boundaries, <br />allocations to appropriate geographic units will be made. <br />Specific problems will be identified and described for the area over <br />which they extend; but the extent to which these problems exist or will <br />emerge within each geographic unit also will be discussed. <br />Thus, each geographic unit will be considered as a problem area, <br />with its problem components or deficiencies identified by the Specific <br />Problem Analysis (Step 02B). Each geographic unit will be rated as to <br />the severity and urgency of its water problem in comparison with other <br />geographic units. <br />h <br />