Suisun Marsh Fish Report 2011 Final.Pdf

Total Page:16

File Type:pdf, Size:1020Kb

Suisun Marsh Fish Report 2011 Final.Pdf SUISUN MARSH FISH STUDY Trends in Fish and Invertebrate Populations of Suisun Marsh January 2011 - December 2011 Annual Report for the California Department of Water Resources Sacramento, California Teejay A. O'Rear and Peter B. Moyle Department of Wildlife, Fish, and Conservation Biology University of California, Davis July 2012 SUMMARY Suisun Marsh, at the geographic center of the San Francisco Estuary, is important habitat for introduced and native fishes. With funding from the California Department of Water Resources (DWR), the University of California, Davis, Suisun Marsh Fish Study has systematically monitored the marsh's fish populations since 1980. The purpose of the study has been to determine the environmental factors affecting fish abundance and distribution within the context of evolving water management. In 2011, we conducted 259 otter trawls and 74 beach seines. Our catches of plankton- feeding macroinvertebrates and fishes were strongly influenced by the interaction of high Delta outflows, low salinities, and the cold winter and spring. The prolonged low salinities severely reduced the population of overbite clams (Potamocorbula amurensis) in the southwest marsh, in addition to delaying the appearance of Black Sea jellyfish (Maeotias marginata) medusae until very late in the year. Species that ultimately benefit from high flows for spawning, due to either increased floodplain inundation [e.g., Sacramento splittail (Pogonichthys macrolepidotus)] or reduced salinities [e.g., white catfish (Ameiurus catus)], recruited to the marsh in high numbers. Additionally, delta smelt (Hypomesus transpacificus) reached their highest abundance in the marsh since 2001, which was likely due to the combination of (1) high flows both reducing entrainment and promoting plankton blooms, (2) colder water during spring creating more favorable spawning conditions, and (3) appropriate temperatures and salinities occurring in the marsh during autumn. Cold temperatures in the first part of the year delayed reproductive development of introduced fishes such as striped bass (Morone saxatilis) and Mississippi silverside (Menidia audens). In the case of striped bass, young-of-year fish arrived in the marsh later than in average years and after mysids, their primary prey, had already declined to low levels; consequently, there was a mismatch in timing between predator and prey. This mismatch probably increased mortality of young striped bass, leading to their reduced abundance in our otter trawls, and forced a greater proportion of these fish inshore, which was reflected in an increase in their numbers in our beach seines. As in 2010, cold temperatures truncated the spawning period and increased mortality of Mississippi silverside, with the effect that they reached their lowest abundance since 1998. The end result was that native species comprised a greater proportion of the macroinvertebrate and fish assemblages in 2011 relative to recent years. We were also able to sample two areas during spring to which we previously have not had access: the upper Cordelia Slough complex and a duck-club ditch. The Cordelia Slough sampling reflected a fish community primarily structured by a salinity gradient, with salt-intolerant species more abundant in reaches influenced by freshwater flows. Sampling in the duck club ditch showed high abundances of small fish, reflecting the high productivity of these habitats. However, the fish assemblages in different parts of the ditch revealed that a water control structure was limiting larger, older fish to just part of the ditch. 2 TABLE OF CONTENTS Introduction………………………………………………………………………………..….….4 Methods………………………………………………………………………………….…….….7 Results and Discussion……………………………………………………………………….....13 Abiotic Conditions...........................................................................................................13 Trends in Invertebrate Abundance and Distribution..................................................17 Trends in Fish Distribution and Abundance.................................................................20 Cordelia Slough Complex................................................................................................37 Tule Red Duck Club........................................................................................................39 Conclusions……………………………………………………………………………………...42 References……………………………………………………………………………………….43 Appendices………………………………………………………………………………………47 3 INTRODUCTION Suisun Marsh is a brackish-water marsh bordering the northern edge of Suisun, Grizzly, and Honker bays in the San Francisco Estuary (Figure 1); it is the largest uninterrupted expanse of estuarine marsh remaining on the western coast of the contiguous United States (Moyle et al. 1986). Most of the marsh area is diked wetlands managed for waterfowl, with the rest of the acreage consisting of tidal sloughs and marsh plain (DWR 2001). The marsh's central location in the San Francisco Estuary makes it an important nursery for salt-tolerant-freshwater, estuarine, and marine fishes. Figure 1. Suisun Marsh and Bay (from Schroeter et al. 2006). In January 1979, DWR contracted with UC Davis to monitor fish populations in Suisun Marsh. Since 1979, monitoring has remained continuous and in compliance with regulatory requirements of (1) the San Francisco Bay Conservation and Development Commission 4-84 (M) Special Condition B, (2) the US Army Corps of Engineers 16223E58B Special Condition 1, and (3) the Revised Suisun Marsh Monitoring Agreement (Agreement Number 4600000634). The study has used two primary methods for sampling fishes: beach seines and otter trawls. Juveniles and adults of all species have been surveyed systematically since 1980; between 1994 and 1999, larval fishes were also surveyed to better understand their ecology in the marsh (Matern and Meng 2001). Other objectives have included (1) evaluating the effects of the Suisun Marsh Salinity Control Gates on fishes (Matern et al. 2002), which began operating in 1988 4 (DWR 2001); (2) examining long-term changes in the Suisun Marsh ecosystem in relation to other changes in the San Francisco Estuary; and (3) enhancing understanding of the life history and ecology of key species in the marsh. Secondary objectives have included supporting research by other investigators through special collections; providing background information for in-depth studies of other aspects of the Suisun Marsh aquatic ecosystem (e.g., studies of jellyfish biology); contributing to the general understanding of estuarine systems through publication of peer-reviewed papers; training undergraduate and graduate students in estuarine studies and fish sampling; and providing a venue for managers and biologists interested in the marsh to experience it firsthand. The project also collected fish for studies on (1) documenting predation on delta smelt by Mississippi silverside and striped bass via DNA techniques, (2) American shad (Alosa sapidissima) life history and distribution using genetic analyses, (3) sexual behavior of tule perch (Hysterocarpus traski), (4) longfin smelt (Spirinchus thaleichthys) ecology through otolith chemistry, (5) food-web structure using stable isotopes, and (6) fatty-acid composition of key zooplankton species. Additionally, the long-term dataset is currently being used to (1) model delta and longfin smelt population dynamics, (2) study trends in near-shore fish assemblages along the San Francisco Estuary's longitudinal axis, (3) inform wetland restoration in the western marsh, and (4) compare the biomass of marsh fishes to those in the bays. Data collected by the study has also been used to inform future management of the San Francisco Estuary for the benefit of native fishes (Moyle et al. 2012a) and to compare fish assemblages along the estuary's salinity gradient (Moyle et al. 2012b). Moyle et al. (1986) evaluated the first five years of data collected by the study and found three groups of species that exhibited seasonal trends in abundance, primarily due to recruitment. The structure of the fish community was relatively constant through time; however, total fish abundance declined over the five years. The decline was partly due to strong cohorts early in the study period, which was followed by both extremely high river flows and drought that resulted in poor recruitment. The authors also found that native fishes tended to be more prevalent in small, shallow sloughs, while introduced species were more prominent in large sloughs. Meng et al. (1994) incorporated eight more years into their study, which revealed that the fish assemblage structure was less constant over the longer time period than the earlier study indicated. Additionally, introduced fishes had become more common in small, shallow sloughs, possibly as a result of drought and high exports allowing increased salinities in the marsh and depressing reproductive success of native fishes. Like Moyle et al. (1986), Meng et al. (1994) found a general decline in total fish abundance (particularly in the native fishes) through time. Matern et al. (2002) found results similar to Meng et al. (1994): fish diversity was highest in small sloughs, and native fish abundances continued to decrease. In recent years, O'Rear and Moyle (2010, 2009, 2008) have bolstered the findings of previous studies and documented changes that appear to be happening in other parts of the estuary. For instance, the timing, variability, and magnitude of Delta outflow continue to be important factors affecting the
Recommended publications
  • (Oncorhynchus Mykiss) in Streams of the San Francisco Estuary, California
    Historical Distribution and Current Status of Steelhead/Rainbow Trout (Oncorhynchus mykiss) in Streams of the San Francisco Estuary, California Robert A. Leidy, Environmental Protection Agency, San Francisco, CA Gordon S. Becker, Center for Ecosystem Management and Restoration, Oakland, CA Brett N. Harvey, John Muir Institute of the Environment, University of California, Davis, CA This report should be cited as: Leidy, R.A., G.S. Becker, B.N. Harvey. 2005. Historical distribution and current status of steelhead/rainbow trout (Oncorhynchus mykiss) in streams of the San Francisco Estuary, California. Center for Ecosystem Management and Restoration, Oakland, CA. Center for Ecosystem Management and Restoration TABLE OF CONTENTS Forward p. 3 Introduction p. 5 Methods p. 7 Determining Historical Distribution and Current Status; Information Presented in the Report; Table Headings and Terms Defined; Mapping Methods Contra Costa County p. 13 Marsh Creek Watershed; Mt. Diablo Creek Watershed; Walnut Creek Watershed; Rodeo Creek Watershed; Refugio Creek Watershed; Pinole Creek Watershed; Garrity Creek Watershed; San Pablo Creek Watershed; Wildcat Creek Watershed; Cerrito Creek Watershed Contra Costa County Maps: Historical Status, Current Status p. 39 Alameda County p. 45 Codornices Creek Watershed; Strawberry Creek Watershed; Temescal Creek Watershed; Glen Echo Creek Watershed; Sausal Creek Watershed; Peralta Creek Watershed; Lion Creek Watershed; Arroyo Viejo Watershed; San Leandro Creek Watershed; San Lorenzo Creek Watershed; Alameda Creek Watershed; Laguna Creek (Arroyo de la Laguna) Watershed Alameda County Maps: Historical Status, Current Status p. 91 Santa Clara County p. 97 Coyote Creek Watershed; Guadalupe River Watershed; San Tomas Aquino Creek/Saratoga Creek Watershed; Calabazas Creek Watershed; Stevens Creek Watershed; Permanente Creek Watershed; Adobe Creek Watershed; Matadero Creek/Barron Creek Watershed Santa Clara County Maps: Historical Status, Current Status p.
    [Show full text]
  • A Revision of the Marsh Wrens of California. 1
    308 Swarth, Marsh Wrens of California. \ia\y October 16. White-throated Sparrow, Ruby-crowned Kinglet. 17. Cowbird, Myrtle Warbler. 18. Bewick's Wren. 20. Vesper Sparrow. 21. Swamp Sparrow. 24. Pipit. 2ti. Wilson's Snipe. 28. Rusty Blackbird. 31. Slate-colored Junco. November 2. Purple Grackle. 4. Purple Finch. 10. Mallard. 15. Fox Sparrow. 21. Pine Siskin. 23. Short-eared Owl. A REVISION OF THE MARSH WRENS OF CALIFORNIA. 1 BY HARRY S. SWARTH. An extensive series of marsh wrens from the delta region east of San Francisco Bay has been accumulated in the California Museum of Vertebrate Zoology, chiefly through the personal efforts of Misses Annie M. Alexander and Louise Kellogg. The appear- ance of these birds contrasts so strongly with specimens avail- able from other parts of California that it has seemed desirable to make a careful study of their systematic status. With this object in view, as many specimens as possible have been assembled illustrative of the Long-billed Marsh Wren (Tclmatodytcs palustris) upon the Pacific Coast, especially in ( alifornia. Although each of the several collections examined or appealed to contained but a meager representation of the species, still, by assembling material 1 Contribution from the University of California Museum of Vertebrate Zoology. Vol. VWIVl Swarth, Marsh 1917 J Wrens of California, 309 from many sources, and for the use of which specific acknowledg- ment is made beyond, a total of 2)59 skins became available. This series, while still leaving gaps to be filled before any precise plotting of breeding ranges can be made, is more than any previous student Points from which specimens were ex- amined: D Telmatodyles p.
    [Show full text]
  • 550. Regulations for General Public Use Activities on All State Wildlife Areas Listed
    550. Regulations for General Public Use Activities on All State Wildlife Areas Listed Below. (a) State Wildlife Areas: (1) Antelope Valley Wildlife Area (Sierra County) (Type C); (2) Ash Creek Wildlife Area (Lassen and Modoc counties) (Type B); (3) Bass Hill Wildlife Area (Lassen County), including the Egan Management Unit (Type C); (4) Battle Creek Wildlife Area (Shasta and Tehama counties); (5) Big Lagoon Wildlife Area (Humboldt County) (Type C); (6) Big Sandy Wildlife Area (Monterey and San Luis Obispo counties) (Type C); (7) Biscar Wildlife Area (Lassen County) (Type C); (8) Buttermilk Country Wildlife Area (Inyo County) (Type C); (9) Butte Valley Wildlife Area (Siskiyou County) (Type B); (10) Cache Creek Wildlife Area (Colusa and Lake counties), including the Destanella Flat and Harley Gulch management units (Type C); (11) Camp Cady Wildlife Area (San Bernadino County) (Type C); (12) Cantara/Ney Springs Wildlife Area (Siskiyou County) (Type C); (13) Cedar Roughs Wildlife Area (Napa County) (Type C); (14) Cinder Flats Wildlife Area (Shasta County) (Type C); (15) Collins Eddy Wildlife Area (Sutter and Yolo counties) (Type C); (16) Colusa Bypass Wildlife Area (Colusa County) (Type C); (17) Coon Hollow Wildlife Area (Butte County) (Type C); (18) Cottonwood Creek Wildlife Area (Merced County), including the Upper Cottonwood and Lower Cottonwood management units (Type C); (19) Crescent City Marsh Wildlife Area (Del Norte County); (20) Crocker Meadow Wildlife Area (Plumas County) (Type C); (21) Daugherty Hill Wildlife Area (Yuba County)
    [Show full text]
  • U.S. Fish and Wildlife Service Biological Opinion 2016
    Final EA-09-098 Appendix A U.S. Fish and Wildlife Service Biological Opinion United States Department of the Interior FISH AND WILDLIFE SERVICE Sacramento Fish and Wildlife Office In Reply Refer to: 2800 Cottage Way, Suite W-2605 08ESMF00­ Sacramento, California 9 5825-1846 2015-F-0008-R001 DEC 2 2 2016 Memorandum To: Rain Emerson, Supervisory Natural Resources Specialist, U.S. Bureau of Reclamation, Mid-Pacific Region, South-Central California Area Office, Fresno, California From jv\.~ or, Sacramento Fish and Wildlife Office, Sacramento, California Subject: Reinitiation of Formal Consultation on the Contra Costa Water District Shortcut Pipeline Improvement Project near the Unincotporated Community of Clyde, Contra Costa County, California This memorandum is in response to the U.S. Bureau of Reclamation's (USBR) November 18, 2016, request for reinitiation of formal consultation with the U.S. Fish and Wildlife Set-vice (Set-vice) on the proposed Contra Costa Water District (CCWD) Shortcut Pipeline (SCPL) Improvement Project (proposed project) near the unincotporated community of Clyde in Contra Costa County, California. Your request was received by the Set-vice on November 23, 2016. USBR is requesting the reinitiation of formal consultation because CCWD is requesting (1) to add an additional staging area adjacent to Site 4, (2) to include improvements to an existing gravel road adjacent to Site 10, (3) to include annual mowing of the SCPL right-of-way (ROW) adjacent to the newly consttucted roads and repaired valves, and (4) to compensate at a 3:1 ratio for the permanent loss of habitat along the SCPL ROW instead of restoring habitat onsite and compensating at the 1:1 ratio for temporaty effects.
    [Show full text]
  • Suisun Marsh Fish Report 2018 Final.Pdf
    Trends in Fish and Invertebrate Populations of Suisun Marsh January 2018 - December 2018 Annual Report for the California Department of Water Resources Sacramento, California Teejay A. O'Rear*, Peter B. Moyle, and John R. Durand Department of Fish, Wildlife, and Conservation Biology Center for Watershed Sciences University of California, Davis October 2020 *Corresponding author: [email protected] SUMMARY Suisun Marsh, at the geographic center of the northern San Francisco Estuary, is important habitat for native and non-native fishes. The University of California, Davis, Suisun Marsh Fish Study, in partnership with the California Department of Water Resources (DWR), has systematically monitored the marsh's fish populations since January 1980. The study’s main purpose has been to determine environmental and anthropogenic factors affecting fish distribution and abundance. Abiotic conditions in Suisun Marsh during calendar-year 2018 returned to fairly typical levels following the very wet year of 2017. Delta outflow was generally low, with higher-than- average outflows only occurring in April when Yolo Bypass flooded. Salinities in 2018 were about average, in part because of Suisun Marsh Salinity Control Gates operations in late summer. Water temperatures were mild, being higher than average in winter and autumn and slightly below average during summer. Water transparencies were typical in winter and spring but, as has become a pattern since the early 2000s, were higher than average in summer and autumn. Dissolved-oxygen concentrations were consistent throughout the year, with only two instances of low values being recorded, both in dead-end sloughs. Fish and invertebrate catches in Suisun Marsh in 2018 told two main stories: (1) many fishes benefit from higher flows and lower salinities in Suisun Marsh while some invasive invertebrates do not; and (2) Suisun Marsh is disproportionately valuable to fishes of conservation importance.
    [Show full text]
  • Trends in Fish and Invertebrate Populations of Suisun Marsh January 2017
    Trends in Fish and Invertebrate Populations of Suisun Marsh January 2017 - December 2017 Annual Report for the California Department of Water Resources Sacramento, California Teejay A. O'Rear, Peter B. Moyle, and John R. Durand Department of Fish, Wildlife, and Conservation Biology Center for Watershed Sciences University of California, Davis January 2019 SUMMARY Suisun Marsh, at the geographic center of the northern San Francisco Estuary, is important habitat for native and non-native fishes. The University of California, Davis, Suisun Marsh Fish Study, in partnership with the California Department of Water Resources (DWR), has systematically monitored the marsh's fish populations since January 1980. The study’s main purpose has been to determine environmental and anthropogenic factors affecting fish distribution and abundance. Calendar year 2017 was wet and warm. Very high Delta outflows resulted in nearly freshwater conditions throughout Suisun Marsh from January to July, with lower-than-average salinities persisting until November. Matching the local climate, water temperatures were generally warmer than usual. Unlike most of the last 10 years when water transparencies greatly increased relative to the average in summer and autumn, water transparencies stayed near or below average for the latter half of 2017. Dissolved oxygen (DO) concentrations were sufficient for marsh fishes except in March in upper Goodyear Slough, when DO concentrations dipped below 3 milligrams per liter (mg/L). The aquatic community of Suisun Marsh responded to the wet, warm conditions. Non- native overbite clams (Potamocorbula amurensis), which require a salinity of at least 2 parts per thousand (ppt) for successful reproduction, were never abundant in 2017.
    [Show full text]
  • Baylands Ecosystem Habitat Goals a Report of Habitat Recommendations
    Baylands Ecosystem Baylands Ecosystem Teams of Bay Area environmental scientists have assessed abitat Goals the past and present conditions of the baylands ecosystem and recommended ways to improve its ecological health. This report presents the Baylands Ecosystem Goals. Habitat Goals Habitat Goals H A Report of Habitat Recommendations Prepared by the San Francisco Bay Area Wetlands Ecosystem Goals Project Db Deep Bay/Channel Basic Baylands Facts Sb Shallow Bay/Channel The baylands exist around the Bay between the lines of high and Tf Tidal Flat low tide. They are the lands touched by the tides, plus the lands that Tm Tidal Marsh the tides would touch in the absence of any levees or other unnat- Tp Tidal Marsh Pan ural structures. Lg Lagoon There are 73,000 acres of tidal baylands and 139,000 acres of diked Bc Beach/Dune baylands. Ag Agricultural Bayland There used to be 23 miles of sandy beaches. Now there are about Dw Diked Wetland seven miles of beaches. Most of the present beaches occur in differ- Sp Salt Pond ent locations than the historical beaches. St Storage or Treatment Pond There used to be 190,000 acres of tidal marsh with 6,000 miles of Uf Undeveloped Bay Fill channels and 8,000 acres of shallow pans. Now there are 40,000 Df Developed Bay Fill acres of tidal marsh with about 1,000 miles of channels and 250 Pr Perennial Pond acres of pans. Rw Riparian Forest/Willow Grove Only 16,000 acres of the historical tidal marsh remain. The rest of Mg Moist Grassland the present tidal marsh has naturally evolved from tidal flat, been Gr Grassland/Vernal Pool Complex restored from diked baylands, or muted by water control structures.
    [Show full text]
  • View Full Report
    Form Approved REPORT DOCUMENTATION PAGE OMB No. 0704-0188 The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 1. REPORT DATE (DD-MM-YYYY) 2. REPORT TYPE 3. DATES COVERED (From - To) October 2007 Final 4. TITLE AND SUBTITLE 5a. CONTRACT NUMBER Spawning, Early Life Stages, and Early Life Histories of the Osmerids Found in the Sacramento-San Joaquin Delta of California 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER Johnson C. S. Wang 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT National Environmental Science, Inc., Central Valley Project/Tracy NUMBER Fish Collection Facility, 6725 Lindemann Road, Byron CA 94514 Bureau of Reclamation, Tracy Fish Collection Facility, TO-412, Volume 38 6725 Lindemann Road, Byron CA 94514 9.
    [Show full text]
  • Embryonic and Larval Development of Sacramento Splittail, Pogonichthys Macrolepidotus Xin Deng1*, Swee J
    MARCH 2012 Embryonic and Larval Development of Sacramento Splittail, Pogonichthys macrolepidotus Xin Deng1*, Swee J. Teh2, Serge I. Doroshov,1 and Silas S. O. Hung1 ABSTRACT KEY WORDS Embryonic and larval development of Sacramento splittail, embryo, larva, development splittail (Pogonichthys macrolepidotus) was char- acterized from zygote to metamorphosis in labora- INTRODUCTION tory conditions. Fertilized eggs were obtained from induced and natural tank spawning of adults caught Sacramento splittail is a cyprinid endemic to in the Yolo Bypass of the Sacramento River. Splittail California’s Central Valley and the San Francisco produced transparent adhesive eggs with a moder- Estuary (Meng and Moyle 1995; Moyle 2002). It is ate perivitelline space. Duration of embryonic devel- the only extant species in genus Pogonichthys, after opment from fertilization to hatching was 100 h the extinction of the congeneric Clear Lake splittail at 18 ± 0.5 °C. Newly hatched larvae were 5.2 to P. ­ciscoides in the 1970s (Moyle 2002). Splittail has 6.0 mm total length with no mouth opening. Yolk- been listed as a species of special concern by the sac larvae were demersal and absorbed the yolk California Department of Fish and Game since 1989, within 10 days post-hatch. Exogenous feeding started then as threatened by the U.S. Fish and Wildlife at 6 days post-hatch, concomitant with swim bladder Service in 1999, primarily due to low population inflation and swim-up movement. Fin differentia- abundance during drought years in 1987 to 1992 tion began at approximately 10 d post-hatch (ca. 8.3 (Meng and Moyle 1994, 1995; Sommer and others to 8.85 mm total length) and was completed at 50 d 1997, 2007, 2008; Moyle and others 2004).
    [Show full text]
  • DRAFT Sonoma Creek Watershed Enhancement Plan
    DRAFT Sonoma Creek Watershed Enhancement Plan An owner’s manual for the residents & landowners of the Sonoma Creek Watershed. Prepared by: The Sonoma Resource Conservation District in conjunction with the people of the Sonoma Creek Watershed and collaboration with the Sonoma Ecology Center. TABLE OF CONTENTS ACRONYMS .................................................................................................................................. 6 ACKNOWLEDGEMENT .............................................................................................................. 8 SECTION 1. INTRODUCTION AND BACKGROUND.............................................................. 9 CHAPTER 1: INTRODUCTION .............................................................................................. 10 PURPOSE OF THE SONOMA CREEK WATERSHED ENHANCEMENT PLAN....................................... 10 PROCESS FOR DEVELOPING THE PLAN ........................................................................................ 10 STAKEHOLDER GROUPS ............................................................................................................. 11 ORGANIZATION OF THE PLAN ..................................................................................................... 14 WATERSHED GOALS ................................................................................................................... 15 CHAPTER 2: WATERSHED DESCRIPTION AND HISTORY ............................................... 18 WATERSHED BOUNDARY OVERVIEW ........................................................................................
    [Show full text]
  • Water Quality Improvement Best Management Practices
    Best Management Practice Recommendations Suisun Marsh TMDL Development January 25, 2013 Prepared by: Dan Gillenwater1, Stuart Siegel1, Jeff Schlueter1, Phil Bachand2, Karen Summers2, and Sujoy Roy2 1Wetlands and Water Resources and 2Tetra Tech Inc. Prepared for: US Environmental Protection Agency, Region 9, San Francisco, CA and San Francisco Bay Regional Water Quality Control Board, Oakland, CA Table of Contents INTRODUCTION .......................................................................................................... 1-1 IDENTIFYING AND PRIORITIZING SLOUGH SYSTEMS FOR WATER QUALITY IMPROVEMENT MEASURES .............................................................. 2-1 Slough System Study Areas .................................................................................. 2-1 Significant Infrastructure Features that Could Influence Water Quality ................. 2-2 Index 1: Slough Hydrology .................................................................................... 2-2 Approach ....................................................................................................... 2-3 Results 2-3 Indices 2 and 3: Contributing Area Characteristics ............................................... 2-3 Approach ....................................................................................................... 2-3 Results 2-4 Index 4: Past Records of Poor Water Quality ........................................................ 2-5 Integrating Indices: Prioritizing Slough Systems for BMP Implementation ...........
    [Show full text]
  • Suisun Marsh Plan-Chap 5
    Chapter 5 Physical Environment This chapter provides environmental analyses relative to physical parameters of the project area. Components of this study include a setting discussion, impact analysis criteria, project effects and significance, and applicable mitigation measures. This chapter is organized as follows: Section 5.1, “Water Supply, Hydrology, and Delta Water Management”; Section 5.2, “Water Quality”; Section 5.3, “Geology and Groundwater”; Section 5.4, “Flood Control and Levee Stability”; Section 5.5, “Sediment Transport”; Section 5.6, “Transportation and Navigation”; Section 5.7, “Air Quality”; Section 5.8, “Noise”; and Section 5.9; “Climate Change.” Suisun Marsh Habitat Management, November 2011 Preservation, and Restoration Plan 5-1 Final EIS/EIR ICF 06888.06 Section 5.1 Water Supply, Hydrology, and Delta Water Management Introduction This section describes the existing environmental conditions and the consequences of implementing the SMP alternatives on water supply, hydrology, and Delta water management. Delta water management for agriculture, water supply diversions, and exports and the salinity of water diverted for waterfowl habitat in the managed wetlands of the Marsh officially became linked in the 1978 State Water Board Delta Water Control Plan and the water right decision (D-1485) Suisun Marsh salinity standards (objectives). D-1485 required DWR and Reclamation to prepare a plan to protect the beneficial use of water for fish and wildlife and meet salinity standards for the Marsh. Initial facilities included improved RRDS facilities to supply approximately 5,000 acres on Simmons, Hammond, Van Sickle, Wheeler, and Grizzly Islands with lower salinity water from Montezuma Slough, and the MIDS and Goodyear Slough outfall to improve supply of lower salinity water for the southwestern Marsh.
    [Show full text]