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<br />LEVEL II <br /> <br /> <br />UNIT AREA <br />WATER YIELD <br /> <br />~ <br /> <br />LEVEL II <br /> <br />I <br />I <br />I Subsurface <br />I <br />I <br /> <br />WA"rERSHED <br />WATER YIELD <br /> <br />Surface <br /> <br />LEVEL III <br /> <br />FLUVIAL <br />GEOMORPHOLOGY <br /> <br />LEGEND <br /> <br />. Good Linkage <br />. Fair Llnkege <br /> <br />----.. Poor Llnkege <br /> <br />Figure I.-Interactions relating events at the atmospheric level (precipitation) to those occurring at the terrestrial and <br />aquatic levels. The line weight of the arrows shows how well these interactions are understood, not the strength of <br />the linkages, <br /> <br />Vegetation (Dr. James L. Smith, Convener) <br /> <br />-<, <br />.. <br /> <br />The vegetation group separated its deliberations according to the two <br />precipitation-management tasks being pursued under Skywater, which are (1) summer-convective <br />rain enhancement in the predominantly grassland and cropland province of the Great Plains, and <br />(2) winter-orographic snowpack enhancement in the predominantly forest province of the <br />mountains with their peripheral scrublands. <br />High plains.- The most important issues were seen as the effect of precipitation management <br />on crop and range production, land-use patterns, and vegetational changes. Effects on pests, soils, <br />and offsite effects were seen as visible but less important issues. <br /> <br />I ~I <br /> <br />5 <br />