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. <br />continued support from other local, state, and/or federal sources. Periodic samples of TDS, <br />specific salt ions, and dissolved Se and U will be available from a subset of river locations within <br />the study regions of the LARB from the CSU project fiznded by the CWQCD. <br />Task 3b: River Water Quality Sampling & River Flow Measurement in the UARB <br />About 3 to 5 locations along the river in the new UARB study region will be selected for EC, <br />temperature, pH, DO, and ORP measurement on a bi-weekly to monthly interval. At 3 to 5 <br />times annually, grab samples also will be taken at these locations for analysis of specific ions, <br />Se, U, and perhaps other minerals in the laboratory following CWQCD protocol. Where <br />possible, sampling will be located at or very near existing flow gauging locations. These <br />gauging locations would include the USGS gauges at Granite (near confluence with Clear Creek) <br />and near Nathrop (near confluence with Chalk Creek) and the CDWR gauge at Salida. At <br />sampling locations that are not near existing gauge sites or when gauges are not operational <br />during the winter (yet ice cover does not prohibit measurement), simultaneous streamflow <br />measurements will be made using acoustic Doppler velocimeters (ADV) or acoustic Doppler <br />velocity profilers (ADCP). Simultaneous stream flow measurements also will be made 3 to 6 <br />times per year at sampling sites near existing stream gauges to check the accuracy of flow rating <br />equations at those gauges. <br />Task 4: Measurement of Tributary, Drain, and Canal Flows and Water Quality <br />Task 4a: Tributary, Drain, and Canal Water Quality Sampling in the LARB <br />The analysis of flows and water quality also will consider irrigation canals and drains as well as <br />tributary streams within the study regions. Values of EC, temperature, pH, DO, and ORP will be <br />measured at 30 to 50 selected locations along major canals, drains, and tributaries in the <br />Upstream Study Region and at 30 to SO locations in the Downstream Study Region of the LARB <br />following CWQCD protocol. These sites have already been established under earlier work in the <br />LARB. Under the proposed project, measurements will be made only bi-monthly to monthly. <br />Simultaneous flow measurements with ADVs and ADCPs will only be made occasionally at <br />some of these sites under the support of this project. Instead, flow rates at the times of EC, <br />temperature, pH, DO, and ORP measurements will be estimated from nearby existing USGS and <br />CDWR gauging sites. Other pending projects, subject to on-going funding, will support more <br />frequent sampling at these locations. In addition, periodic samples for TDS, specific salt ions, Se <br />and U concentration will be available from a subset of about 30 locations in canals, drains, and <br />tributaries in the LARB under a CSU project funded by the CWQCD. <br />Task 4b: Tributary, Drain, and Canal Water Quality Sampling & Flow Measurement in the UARB <br />Similar water quality samples will be taken from waterways within the new study region of the <br />UARB following CWQCD protocol. Initially, we plan to conduct coincident EC, temperature, <br />pH, DO, ORP, and flow measurements at 8 to 12 selected tributary and drain locations in the <br />s