Daily Suspended Sediment Model for Water Resources Management

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by Russ T. Brown, Tennessee Technological Univ, United States,
Kimberly D. Choate, Tennessee Technological Univ, United States,

Document Type: Proceeding Paper

Part of: Sediment Transport Modeling

Abstract: A daily model of streamflow and suspended sediment (SS) concentrations has been developed to analyze daily suspended sediment records from tributary basins. The model provides a method to interpret observed SS patterns in a stream based on the hydrologic conditions in the watershed. The model has been tested on several streams using SS data collected by TVA during the years 1936-1940. The model utilizes a daily water budget to keep track of direct runoff, baseflow, and soil moisture conditions in the basin. Two basic approaches are used to simulate the observed patterns of SS concentrations: 1) a direct runoff flow regression which depends on soil moisture conditions and is diluted by the baseflow, and 2) a 'mud' budget that accounts for the source of SS during rainfall, and estimates the subsequent runoff of water and SS depending on the soil moisture conditions. Additional aspects of the subject are discussed.

Subject Headings: Suspended sediment | Hydrologic models | Water resources | Budgets | Runoff | Soil water | Streamflow | Basins |

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