Rainfall Simulation Studies of Nutrient Export from Watersheds in Arizona and New Mexico

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by 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,

Document Type: Proceeding Paper

Part of: Watershed Planning and Analysis in Action:

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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