Monday, July 11, 2016
9:00 a.m. – 12:00 p.m. PDT
California EPA Building
1001 I Street, Sierra Hearing Room
Sacramento, CA 95814
The first morning of a two-day workshop will provide general and technical overviews of U.S. Bureau of Reclamation’s Sacramento River Temperature Model (SRTM) used to develop temperature operations plans on the Sacramento River. The general overview during the first hour is especially suitable for managers and non-technical staff. The purpose of the workshop is to train members of the Sacramento River Temperature Task Group and affiliated staff on the SRTM. Participation in the remaining 1½ days of the workshop is limited to invitation only (due to limited meeting space) and will consist of hands-on sessions to instruct invited participants on how to reproduce historical scenarios using the SRTM.
The Delta Stewardship Council’s Delta Science Program is sponsoring a workshop to train members of the Sacramento River Temperature Task Group (SRTTG)1 and affiliated staff on the U.S. Bureau of Reclamation’s Sacramento River Temperature Model (SRTM). The SRTM is based on the HEC-5Q Model. The morning of Day 1 is set aside for general and technical overviews of the model. The general overview during the first hour is especially suitable for managers and non-technical staff. The remaining 1½ days of the workshop will consist of hands-on sessions that will instruct participants on how to reproduce historical scenarios using the SRTM. These scenarios will illustrate important model inputs, interpret outputs, model hindcasting and forecasting, and identify key modeling assumptions and requirements. A video broadcast of the Day 1 morning session will be available. There is no charge for attending the workshop.
The U.S. Bureau of Reclamation (Reclamation) holds water rights issued by the State Water Resources Control Board (State Water Board), Division of Water Rights for diversions from the Sacramento River and Trinity River. The water rights for these diversions were conditioned by State Water Board Order 90-5, to require Reclamation to control temperatures on the upper Sacramento River below Shasta Reservoir for the protection of salmonids, including endangered Winter-run Chinook Salmon. State Water Board Order WR 2015-0043 also required Reclamation to prepare and implement a temperature management plan for the Sacramento River this year.
Annually, Reclamation develops temperature operation plans for the Shasta and Trinity divisions of the Central Valley Project (CVP) based in part on temperature modeling of the upper Sacramento River using the Sacramento River Temperature Model (SRTM). These plans, which consider impacts on Winter-run and other races of Chinook Salmon, and associated project operations, are developed with input from a multiagency group referred to as the Sacramento Temperature Task Group (SRTTG). The SRTTG meets throughout the temperature control season to discuss biological, hydrologic, and operational information, objectives, and alternative operations for temperature control.
Elevated river temperatures in the late-summer and fall months in recent years have been identified as a major factor contributing to the decline of fish species in the upper Sacramento River. In October of 2014, the State Water Board requested a working copy of the SRTM to enable staff to increase its understanding of the various factors involved in temperature control and to allow in-house modeling in order to identify operations best suited for temperature control on the Sacramento River. To streamline the process and ensure an objective review of the Temperature Management Plans, the State Water Board has requested that its staff and staff from the SRTTG be trained to use the SRTM. The main goals are to perform temperature modeling runs, including documentation of that work; and independently perform runs and review of materials associated with this work. This hands-on training session is an invitation-only event as spaces are limited.
1 The member organizations of the SRTTG are U.S. Bureau of Reclamation, National Marine Fisheries Service, U.S. Fish and Wildlife Service, CA Dept. of Fish and Wildlife, State Water Resources Control Board, Western Area Power Administration, and the Hoopa and Yurok Tribes.