Laserfiche WebLink
<br />0("8'') <br />UJ.\.. .Ld <br /> <br />Instantaneous stream discharge measurements were made to develop a relationship <br />between stage and stream discharge. This relationship, called the stream discharge rating curve. <br />was applied to the recorded stages for each day of record to determine the mean daily discharge. <br />Similarly, the stream discharge rating curve was applied to the maximum stage during a given <br />year to determine the instantaneous peak discharge for that year. USGS and Forest Service data <br />collection and analysis procedures followed, or were consistent with, standard methodologies <br />that are documented in numerous publications available from the USGS and Forest Service. For <br />the USGS gages, these publications include "Techniques of Water Resource Investigations of the <br />United States Geological Survey", Book 3, Chapters A8 and A6. With respect to the Forest <br />Service gages, documentation of procedures generally used for data collection and analysis are <br />contained in documents such as the following: Nez Perce National Forest "Surface Water <br />Monitoring Methodology," Nov. 23, 1994; Nez Perce National Forest "Computation of <br />Streamflow Data", March I, 1996; and Watershed Management Computer Bulletin No 4. <br />HYDRA (R6FLOW) - Streamflow -Recorder Data Reduction. <br /> <br />1. Sources of Data <br /> <br />The sources of streamflow data relied upon for each claim site, as well as fluvial process <br />study sites, are presented in Tables 3 and 4, <br /> <br />Claim sites that rely entirely upon data from a USGS stream gage located within or near <br />the claim location are the: Boise River, Lochsa River, North Fork Clearwater River, Selway <br />River, South Fork Payette River, South Fork Salmon River, and Valley Creek. For USGS gages, <br />values of daily mean discharge are available from annual USGS publications of water-resources <br />data (e.g., USGS, Water Resources Data Idaho, Water Year 1992), from commercial production <br />and sales of CD-ROMs (updated annually), and, in most instances, from electronic listings on the <br />world-wide' web. These data are also available at the Forest Service Document Center. <br /> <br />Claim sites that rely upon data from a Forest Service stream gage located within or near <br />the claim location are: Little Slate Creek, Lolo Creek, Rapid River, Red River, and South Fork <br />Red River. For Forest Service gages, data are available from agency files and sometimes from <br />miscellaneous publications. These data are also available at the Forest Service Document <br />Center. The claims made at Forest Service gages also rely upon mean daily and instantaneous <br />peak flow data from nearby USGS gages (see section on flow extension). Table 3 displays the <br />most recent operator of the stream gage, period of record, season of operation, gage used for <br />record extension (if extended), and extended period of record (if extended) for each of the <br />channel maintenance claim sites. <br /> <br />United States' Expert Report Disclosing Melhodologies for Quantification of Organic Ad Claims Consolidated Subcase No. 63-25243 <br /> <br />23 <br />