supply and flood control design approaches are well developed, while water quality

approaches are less developed. The streamlining of the planning and design of the

EAASR has posed several challenges resulting in an iterative design process with

multiple conceptual alternative formulations and analyses. Due to differences in the

simulation, uncertainty exists when these multiple formulations and analyses are

compared.

 The systems engineering approach to design provides a proven approach that can

meet the challenges of the EAASR planning and design process. The approach

incorporates disciplinary models that may produce a more optimal design than traditional

approaches. A model in the water quality discipline was therefore sought to assess which

of several alternatives are better. Simple empirical and mass balance models were found

that can be used for the EAASR. Comparable lake and reservoir systems were used to

provide parameter estimates for EAASR. Due to the wide range of possible operational

conditions and planning and design challenges, a water quality model developed

specifically for the EAASR will be necessary. The model must incorporate measures to

meet the planning and design challenges of the EAASR. The iterative multiple

conceptual design alternatives for the EAASR were reviewed. The model was then

formulated in the context of this chapter and the conceptual design alternatives.