Time Rated Infiltrated Depth Familiesby John L. Merriam, California Polytechnic State Univ, Agricultural Engineering Dep, San, Luis Obispo, CA, USA,
Albert J. Clemmens, California Polytechnic State Univ, Agricultural Engineering Dep, San, Luis Obispo, CA, USA,
Abstract: A new set of infiltration families has been developed, for 'normal' soils to describe cumulative infiltrated depth versus time. This new family of curves is described by the time required to infiltrate 100 mm (4 inches) for the normal non-cracking soils and so are called time rated curves. The new time rated curves better represent actual soil infiltration conditions than the SCS intake families. They also are described in a way that is more consistent with their use in surface irrigation design and management. These new curves should thus be more useful and reliable than their predecessors. Cracking soils do not fit the infiltration family concept as well and are more difficult to manage. Some discussion on the nature of infiltration on cracking soils is presented.
Subject Headings: Infiltration | Curvature | Cracking | Surface irrigation | Water intakes | Control systems | Irrigation systems | Soil properties | South Carolina | North America | United States
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