Use of a General Fate Model to Predict the Fate of Taste and Odor Compounds in an Oklahoma Reservoir

Abstract

A general fate (Level III) model was used to predict the fate and transport of geosmin and MIB in Lake Eucha, Oklahoma. The Level III model produced simulations with given input parameters for chemical geosmin and MIB. A sensitivity analyses for the model was also performed. The sensitivity analysis was performed to determine the key parameters that control the fate and transport of geosmin and MIB in a multiphase environment. From the results, the critical parameters were identified to be, log Kow, the half life in water, the volume fraction (suspended particles: water), volume fraction (fish: water) and sediment deposition velocity. Almost 97 % of the geosmin input was chemically transformed (reacted) in water compartment. From the given input emission, 98 % of the residual geosmin was predicted to remain in the water compartment. Then approximately 2 % of the geosmin input was carried out of the system by advection. In the case of MIB, almost 92 % of the MIB input was chemically transformed (reacted) in water compartment. From the given input emission, 98.3 % of the residual MIB was predicted to remain in the water compartment. Approximately 2 % of the MIB input was carried out of the system by advection.