Laserfiche WebLink
<br />RECOMMENDED UNIFORM INFILTRATION RATES <br /> <br />SOIL TEXTURE CLASS <br /> <br />INFILTRATION RATE (inlhr) <br />0.05 - 0.10 <br /> <br />Sil Cia Loam <br />Sandy Clay <br /> <br />0.03 - 0.05 <br /> <br />Silty Clay <br /> <br />0.02 - 0.04 <br /> <br /> <br />These values are based on the saturated hydraulic conductivity for soils in each <br />texture class. In addition to the values listed in the table abeve, the SCS has developed <br />a soil classification system that consists of four groups of soils. Group A includes deep <br />sand, deep loess, and aggregated sitts. Group B consists of shallow loess and sandy <br />loams. Group C includes clay loams, shallow sandy loam, and soils low in organic <br />content and high in clay. Group D consists of soils that swell signijicantly when wet such <br />as heavy plastic clays and certain saline soils. Recommended infiltration rates for each <br />soil group are as follows: <br /> <br />Table 7.4 <br /> <br />GROUP SOIL TYPE I INFILTRATION RATE (inlhrU <br />A Sand, Aggregated Silts 0.30 - 0.45 <br />B Shallow Loess, Sandy l.oams 0.15.0.30 <br />C Low Organics. High Clay 0.05 - 0.15 <br /> -- <br />D Plastic Clays, Saline 0.00 - 0.05 <br /> (MC-Cuen, 1982) == <br /> <br />Table 7.5 lists Colorado soils and their respective hydrologic classifications. <br /> <br />Colorado Flood <br />Hydrology Manual <br /> <br />DRAFT <br /> <br />7.1'7 <br />