Author: U. S. National Marine Fisheries Service
Publisher: Forgotten Books
Published: 2018-01-10
Total Pages: 126
ISBN-13: 9780428740818
DOWNLOAD EBOOK →Excerpt from Biological Opinion for the Trinity River Mainstem Fishery Restoration Eis and Its Effects on Southern Oregon/Northern California Coast Coho Salmon, Sacramento River Winter-Run Chinook Salmon, Central Valley Spring-Run Chinook Salmon: And Central Valley Steelhead; October 12, 2000 The nmfs received a request for formal consultation under section 7 of the esa on the effects of the proposed action on listed Trinity River coho salmon, Central Valley spring-run chinook salmon, and Sacramento River winter-run chinook salmon (december 14, 1999, letter from M. Spear, usfws, and L. Snow, bor). Subsequently, the nmfs received a follow-up letter (june 6, 2000, letter and enclosures from M. Spear and L. Snow to R. Mcginnis [sic]) and enclosed BA that provided supplemental information about the proposed action. In addition to the initial consultation request, the June 6, 2000, letter requested (and provided supplemental information for): (1) reinitiation of the 1992-1993 consultation concerning the impacts to winter-run chinook salmon, and its designated critical habitat resulting from the long term implementation of the Operating Criteria and Plan (ocap) for the Central Valley Project, due to changed circumstances that would result fi'om implementation of the proposed actions; and (2) About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: U.S. Fish and Wildlife Service
Publisher:
Published: 2000
Total Pages: 57
ISBN-13:
DOWNLOAD EBOOK →Author: Rosemarie Lingad Dimacali
Publisher:
Published: 2013
Total Pages: 102
ISBN-13:
DOWNLOAD EBOOK →Sacramento River Winter-run Chinook Salmon (salmon) populations are declining and have been classified as an endangered species since 1994. Populations are sensitive to water temperatures and flow, both of which have changed due to hydraulic operations, and may continue to change in response to climate change. The purpose of this study is to estimate changes in salmon populations in response to a hypothetical climate change scenario using computer models. For two hypothetical climate scenarios, flow data for California's water system have been simulated and made publicly available as part of Department of Water Resource's 2011 State Water Project Delivery Reliability Report. The climate scenarios are: (1) historical climate conditions, and (2) medium-to-high emissions and air temperature changes (a 2050 level of development, A2 greenhouse gas level of emissions). For this study, DWR's flow data, based on 80 years of historical hydrology, and the associated temperatures projected by the ECHAM-5 climate model were used to simulate water temperatures, salmon mortality rates, and salmon production in the upper Sacramento River between Keswick Dam and Red Bluff Dam. The models used in this study -- the Sacramento River Water Quality Model (SRWQM) and the Salmonid Population Model (SALMOD) -- are the same models used by the U.S. Department of Interior Bureau of Reclamation (USBR). SRWQM results show that climate change causes a 3 ̊F increase in maximum water temperatures. SALMOD results show water temperature changes affect the salmon population significantly more than flow. In typical years, calculated salmon mortalities were not changed significantly by climate change (CC). In contrast, when conditions were unfavorable, salmon mortalities were substantially higher under the CC scenario and these unfavorable conditions happened with greater frequency.