Keywords: sediment budget, sediment transport, deposition, TTW, Tennessee-Tombigbee waterway, sediment behaviour, power curve coefficients, sediment fluxes
Sediment Budget Template applied to Aberdeen Pool
This work creates a Sediment Budget Template (SBT) with Aberdeen Pool on the Tennessee-Tombigbee Waterway as the demonstration site. USGS data are the basis for the Power Curve Program which defines the sediment behaviour in terms of a power function. The second program, Tier 1 Program, uses the power curve coefficients along with the bankfull discharge to define the sediment fluxes. Thirdly, the Tier 2 Program uses power curve coefficients to calculate daily sediment flux which are integrated over each year. Lastly, the computer program SIAM is used. Comparison among the methods provides an estimate of the final depositional approximation. Purpose: The intent of this paper is to define a template that outlines recommended steps for constructing a sediment budget for either a river or an estuary system. As seemingly simple as a sediment budget evaluation appears, it in fact is a difficult process even with the use of known methods. By using a multi-prong approach the goal is to reduce uncertainty and target a value that is appropriate. Steps include using three Visual Basic Assistant (VBA) based programs and (SIAM) to calculate the overall change in mass balance and magnitudes of sediment fluxes. The main purpose of this paper is to outline the required approach for this SBT.