This document is not intended to provide the complete methods, or "cookbook" for any of the approaches discussed, but rather is intended to point out and in some cases compare a variety of approaches. Selected references to the scientific literature are provided to enable the reader to obtain additional details on the methods used for each approach, as well as their successful application. As this document illustrates, there is not a one-size-fits-all scientific approach to studying any given effect of hydroelectric projects. To help the reader evaluate which approaches might be best suited for a particular project, information is provided for some types of studies on the advantages, disadvantages, and site-specific considerations and applicability of many of the scientific methods. However, it is not possible to provide all of the criteria in this report that a relicensing participant could consistently and definitively use to select the appropriate study approach in all potential scenarios. It is typically the responsibility of the resource specialist involved to explain and defend the approaches selected, and at a minimum, it is the intention of this document to provide enough background information for a participant to judge and respond to the selection. Sometimes a combination of approaches is required to evaluate a given project effect. Also, external limitations such as financing or social priorities may drive study selection and development.
 | 1.2 Priorities | Page 8 of 134 | 2 Water Quality |  |