12.07.2015 Views

Runoff generation mechanisms

Runoff generation mechanisms

Runoff generation mechanisms

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Alabama P-IndexP• Alabama P-Index: Palleviate water quality issues related to Ploss• Based on the principle that P is transported in surface runoff• Agronomic soil P thresholds• <strong>Runoff</strong> class (hydrologic soil groups)• Soil erosion• P application distance to water• Treats an entire field as runoff (and P) contributing area• Recent studies indicate subsurface transport might beimportant• <strong>Runoff</strong> might not occur uniformly (spatial and temporally) onthe entire hillslope

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