Short-term and Long-term Sediment and Phosphorus Inputs to Lake Lanier
Rasmussen, Todd C.
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The rating curve method is used to quantify daily sediment and phosphorus loads to Lake Lanier. The sediment rating curve was constructed using discharge and suspended sediment records for the Chattahoochee River and tributaries. Bedload sediment transport is not included in the sediment rating curve. The daily variability of sediment concentration is reconstructed using the discharge-sediment rating curve. Total phosphorus concentrations are strongly correlated with sediment concentrations. This approach is superior to other sediment and nutrient yield models (e.g., the Universal Soil Loss Equation) because the seasonal and annual estimates provided by these approaches are not compatible with the need to model lake water quality dynamics on a daily basis.