SPECIAL NOTICE
R -- R--River Basin Model 10 (RBM10) Temperature and Flow Model
- Notice Date
- 7/20/2022 11:09:23 AM
- Notice Type
- Special Notice
- NAICS
- 541620
— Environmental Consulting Services
- Contracting Office
- MP-REGIONAL OFFICE SACRAMENTO CA 95825 USA
- ZIP Code
- 95825
- Solicitation Number
- 140R2022Q0118
- Response Due
- 8/3/2022 10:00:00 AM
- Point of Contact
- Phan, Mouang, Phone: 916-978-5127, Fax: 916-978-5175
- E-Mail Address
-
MPhan@usbr.gov
(MPhan@usbr.gov)
- Description
- River Basin Model 10 (RBM10) Temperature and Flow Model THIS IS NOT A REQUEST FOR QUOTE (RFQ) AND NO SOLICITATION IS AVAILABLE The US Bureau of Reclamation (USBR), California Great Basin Region, intends to negotiate a contract on a sole source basis with Riverbend Science under the authority of FAR 13.501, Only one responsible source using Simplified Acquisition Procedures. The contractor shall develop River Basin Model 10 (RBM10) version 2.0 model to increase its range of application and improve the model�s accuracy. Scope The scope of improvements to RBM10 under this contract includes refining estimates of tributary flow and temperature inputs in the model. Currently, when modeled flows differ substantially from regulated flows or involve rapid changes in flow, negative inflows and erroneous temperatures from tributary streams occur in the model. Correcting this will better enable river flows and temperatures that are not reflected in the period of record for regulated flows considered in the model (January 1, 1980 to December 31, 2018) to be evaluated. This is important for adaptively managing ROD (USDOI, 2000) allocated water through evaluation of effects of proposed discharges on physical habitat and salmon production in the Trinity River. Objectives Refine boundary conditions to improve the accuracy of tributary inputs of flow and temperature to the river. Changes in discharge between river flow gages are currently assigned proportionately by tributary watershed area. When dam releases rise sharply, calculated tributary flows can be negative, causing errors in predictions of creek and so also river water temperatures particularly when running flow scenarios that differ from historical flows. Tasks The tasks associated with this contracted work involve more accurately assigning tributary inputs of flow and water temperatures to the Trinity River in RBM10. These improvements have three components: 1) Updated calculation of tributary flows. We propose several improvements to Jones et al.�s (2016) method of using the daily differences between the Lewiston and Hoopa USGS gages to calculate tributary inputs. The four adjustments below were previously tested by Asarian et al. (2021) and found to improve temperature predictions on the mainstem river. First, since flows have been gaged on the South Fork Trinity River at Hyampom (October 1, 1965 to present) for the period that will be considered in RBM10 v.2.0 (January 1, 1980 through 2021), we will deduct the flow of that gage from the Lewiston to Hoopa flows as well as take that gage�s watershed area into account when apportioning discharge among tributaries. Second, a three-day average will be calculated prior to taking the difference between gages, to reduce �noise� from measurement errors. Third, to realistically consider flow travel time between Lewiston and Hoopa, we will investigate using flow speed equations developed by tracking flow changes at Lewiston Dam between gages on the river. The equations could then be used to account for delayed arrival of flows between tributary nodes when they occur in whole day increments. Fourth, to avoid negative flows, prior to apportioning the flow among tributaries by watershed area, a minimum threshold will be applied. For example, Asarian et al. (2021) used a minimum threshold of 56 cfs based on an area-based extrapolation of lowest flows measured at gaged tributaries during the 2013�2015 drought). 2) Additional historic tributary temperatures obtained from many entities were compiled by Asarian et al. (2021) and will be used as inputs to RBM10 v2.0. The temperatures are related to discharge and date so that improvements in discharge estimates by date at tributary junctions will lead to improved temperature predictions of tributary flows. 3) Improved methods for filling gaps in temperature measurements at Lewiston and tributaries. Jones et al. (2016) filled gaps in temperature records for Lewiston and the tributaries using non-linear regression based on air temperature. Lewiston temperatures are also affected by Trinity Reservoir water storage, Julian day, and flow through Lewiston Reservoir. We will apply generalized additive models (GAMs) using these variables to fill gaps in river temperatures at Lewiston. From 2011�2017, Lewiston water temperature data were influenced by the hatchery outfall and were not representative of well-mixed river conditions, so this error will be remedied using regression with two hatchery inflow temperature sites. During spring runoff, creek flows have a strong influence on tributary temperatures, so we will apply GAMs that use air temperature, flow, and Julian day to fill gaps in temperature for tributary streams. Firms which can provide the River Basin Model 10 (RBM10) version 2.0 model above must submit written notice to the Contracting Office and must provide evidence in sufficient detail to demonstrate the respondent's ability to meet the stated requirement. This is not a request for competitive quotations. A determination by the Government not to compete this proposed action based on responses to this notice is solely within the discretion of the Government. Information received will be considered solely for the purpose of determining whether to conduct a competitive procurement. Responses shall include firm name, address, Unique Entity ID, and point of contact. Firms shall identify their business size (small, other than small, etc.) in accordance with the size standard $16.5M. for NAICS code 541620 (Environment Consulting Services). This notice is the only official pre-solicitation notice of this requirement. Please note that any prospective quoters must be registered in the System for Award Management (SAM) at www.sam.gov in accordance with FAR Subpart 4.11. The following information is pertinent to this notice: 1. Responses shall be submitted by 10:00 AM Pacific Daylight Time, August 3, 2022 to the point of contact below. 2. Point of Contact/Contracting Office Address: U.S. Bureau of Reclamation, California � Great Basin Acquisitions Division, Supply and Services Branch 2800 Cottage Way, Sacramento CA 95825 Mouang Phan, Contract Specialist mphan@usbr.gov
- Web Link
-
SAM.gov Permalink
(https://sam.gov/opp/1a37a5d62dc14b0e97fd67a4de7bde8a/view)
- Record
- SN06395067-F 20220722/220720230111 (samdaily.us)
- Source
-
SAM.gov Link to This Notice
(may not be valid after Archive Date)
| FSG Index | This Issue's Index | Today's SAM Daily Index Page |