Laserfiche WebLink
<br />. <br /> <br />Table 19 <br />Infiltration Rates for Sheep Draw Basin <br /> <br />Soil Association <br /> <br />Soil Series <br /> <br />Olney-Kim-Otero <br /> <br />Olney <br /> <br />Kim <br /> <br />Otero <br /> <br />Weld-Colby <br /> <br />Weld <br /> <br />Colby <br /> <br />Depth Permeability <br />(inches) (inches/hour) <br />0-10 0.6 - 2.0 <br />10-20 0.6 - 2.0 <br />20-30 0.6 - 6.0 <br />30-60 2.0 - 6.0 <br />0-60 0.6 - 2.0 <br />0-60 6.0 - 20.0 <br />0-7 0.6 - 2.0 <br />7-30 0.2 - 0.6 <br />30-60 0.6 - 2.0 <br />0-60 0.6 - 2.0 <br /> <br />SWMM Infiltration <br />Rate <br />(inches/hour) <br /> <br />0.8 <br /> <br />0.8 <br /> <br />All but the upper 3 square miles of the Sheep Draw basin has the Olney- <br /> <br /> <br />Kim-Otero soil association. An infiltration rate of 0.8 inch per hour <br /> <br /> <br />was selected as being representative of the ranges given above. A <br /> <br /> <br />value of 0.2 inch was used for detention storage on pervious and <br /> <br /> <br />impervious areas. <br /> <br />LAND USE <br /> <br /> <br />The Sheep Draw basin is subject to future urban development from <br /> <br /> <br />the city of Greeley. Changes in imperviousness that would result from <br /> <br /> <br />land use changes will affect the runoff potential. To reflect the <br /> <br /> <br />influence of changing development, three levels of urbanization were <br /> <br /> <br />considered. Two of these urbanization levels, existing and projected, <br /> <br />are shown in the report Larimer-Weld Region Land Use Alternatives pre- <br /> <br /> <br />pared for the Larimer-Weld Regional Council of Governments in November, <br /> <br />1977. The existing urbanization condition reflects no significant <br /> <br /> <br />development. Projected urbanization is based upon year 2000 land use <br /> <br /> <br />and is an intermediate level of development. Total urbanization assumes <br /> <br /> <br />the entire basin is urbanized. <br /> <br />. <br /> <br />43 <br />