Gully Incision Prediction on Reclaimed Slopesby Steven R. Abt, (M.ASCE), Colorado State Univ, Fort Collins, CO, USA,
John A. Falk, Colorado State Univ, Fort Collins, CO, USA,
John D. Nelson, (M.ASCE), Colorado State Univ, Fort Collins, CO, USA,
T. L. Johnson, (M.ASCE), Colorado State Univ, Fort Collins, CO, USA,
Abstract: An investigation was conducted to estimate the potential of gully intrusion into reclaimed waste impoundments. A series of eight reclaimed impoundments exhibiting gully intrusions were surveyed. An empirical analysis was performed to correlate drainage area, precipitation, embankment slope, cover soil properties and time to the maximum depth of gully incision. The results indicated that the number of rainfall events that cause runoff, the tributary area to the gully, the soil median grain diameter and the initial slope of the reclaimed impoundment were related to the average vertical rate of gully incision. An expression was also presented for estimating the long-term stable slope through the reclamation area and for estimating the rate of decay of the slope in the gully as a function of time.
Subject Headings: Slopes | Water storage | Channel flow | Water reclamation | Land reclamation | Soil analysis | Water flow
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