Rainfall Simulation Studies of Nutrient Export from Watersheds in Arizona and New Mexicoby Susan Bolton, New Mexico State Univ, United States,
Tim J. Ward, New Mexico State Univ, United States,
Richard A. Cole, New Mexico State Univ, United States,
Abstract: Data from rainfall simulation experiments conducted in Arizona and New Mexico were used to identify relationships between total suspended sediment (TSS) concentrations (kg/ha/mm of runoff) in runoff and concentrations (kg/ha/mm of runoff) of total phosphorus (TP) and total volatile suspended sediment (TVSS). Lumping data from five vegetation types yielded the following relationship for total phosphorus: TP = 0.0013* (TSS)** 0.83 with a linear correlation coefficient, r = 0.77. The relationship for total volatile suspended sediment was TVSS = 0.274* (TSS)** 0.72 (r = 0.91). These relationships were validated using data from other experiments and ephemeral channel flow.
Subject Headings: Watersheds | Suspended sediment | Developing countries | Rain water | Nutrients | Runoff | Rainfall-runoff relationships | Phosphorus | Channel flow | Vegetation | North America | United States | Arizona | New Mexico
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