Laserfiche WebLink
<br />. <br /> <br />Table 10 <br />Infiltration Rates For Fossil Creek Basin <br /> <br />Soil Association <br /> <br />Soil Series <br /> <br />Permeability <br />(inches/hour) <br /> <br />SWMM Infiltration <br />Rate <br />(inches/hour) <br /> <br />Otero-Nelson-Tassel <br /> <br />3.0 <br /> <br />Otero <br />Nelson <br />Tassel <br /> <br />6.0 - <br />2.0 <br />2.0 - <br /> <br />20.0 <br />6.0 <br />6.0 <br /> <br />Haplustolls-Baller-Rock <br />Outcrop <br /> <br />3.0 <br /> <br />Baller <br /> <br />2.0 - 6.0 <br /> <br />Nunn-Fort Collins-Ulm <br /> <br />Nunn <br />Fort Collins <br />Ulm <br /> <br />0.2 - 2.0 <br />0.6 - 2.0 <br />0.2 - 0.6 <br /> <br />1.0 <br /> <br />Laporte-Kim-Minnequa <br /> <br />1.0 <br /> <br />Laporte <br />Kim <br />Minnequa <br /> <br />0.6 - 2.0 <br />0.6 - 2.0 <br />0.6 - 2.0 <br /> <br />Heldt-Renohill-Kim <br /> <br />0.4 <br /> <br />Hel dt <br />Renohill <br />Kim <br /> <br />0.2 - 0.6 <br />0.2 - 0.6 <br />0.6 - 2.0 <br /> <br />The infiltration rate of 0.4 inch per hour was used over most of <br /> <br /> <br />the basin. Selected detention storage values are 0.3 inch for pervious <br /> <br /> <br />areas and 0.2 inch for impervious areas. <br /> <br />LAND USE <br /> <br />The Fossil Creek basin is subject to increasing urban development <br /> <br /> <br />from the city of Fort Collins. Changes in imperviousness that would <br /> <br /> <br />result from land use changes will affect the runoff potential. To <br /> <br />reflect the influence of changing development, three levels of urbani- <br /> <br /> <br />zation were considered. Two of these urbanization levels, existing and <br /> <br /> <br />projected, are shown in the report Larimer-Weld Region Land Use Alterna- <br /> <br />tives prepared for the Larimer-Weld Regional Council of Governments in <br /> <br />November 1977. The existing urbanization condition reflects little <br /> <br />. <br /> <br />29 <br />