DOCSLIB.ORG

SAV Nutrient Cycling – Nicole Cai, VIMS

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
SAV Nutrient Cycling – Nicole Cai, VIMS Impacts of Submerged Aquatic Vegetation on Water Quality In Cache Slough Complex, Sacramento-San Joaquin Delta: A Numerical Study Nicole Cai, Joseph Zhang, Jian Shen Jun 07, 2021 1 A story of a fish Egeria densa (invasive) ➢ Displaced most of the native SAV species within Delta ➢ Form canopies in slow-flowing or still water ➢ Stems can grow from 1.8 m to 3 m, or even to the water surface ➢ Delta Smelt Resiliency Strategy calls for enhanced control and study of the effects of removal by herbicide. Delta Smelt (endangered) ➢ Endemic and indicator species for the health of the Delta ecosystem ➢ It is functionally extinct in the wild, which coincides with substantial changes in Delta ecosystem 2 Impacts of SAV 3) 1) Impact through Direct Impact Feedback Effects on 2) Hydrodynamics Impact through • Nutrient uptake/release Interactions with • Oxygen production/consumption Phytoplankton • Decreased local velocity • Prolonged residence time • Altered material transport • Nutrient competition • Light shading 3 SCHISM-ICM-SAV SAV Model (Biomass dynamics) SCHISM ICM Hydrodynamics Model Water Quality Model (Tide, Temperature, Salinity, Wind) (Algae, C, N, P, DO) Sediment Flux Model (Diagenesis of POM, recycling of nutrients) 4 Background Model developments Model implementations Results Discussions Summary Vegetation impacts on hydrodynamics in SCHISM 휕푤 Continuity equation: 훻 ∙ 퐮 + = 0 휕푧 where 퐟 is forcing terms in momentum treated explicitly in 휕퐶 휕 휕퐶 the numerical formulation – Coriolis force, baroclinic Transport equation: + 훻 ∙ 퐮퐶 = 휅 + 퐹ℎ 휕푡 휕푧 휕푡 gradient, atmospheric pressure, earth tidal potential, 퐷퐮 휕 휕퐮 Momentum equation: = 휈 − 푔 ∙ 훻휂 푥, 푦, 푡 + 퐟 + 퐅 horizontal viscosity and other forces. 퐷푡 휕푧 휕푧 퐯퐞퐠 퐅퐯퐞퐠 = 0.5 ∙ 퐷푣 ∙ 푁푣 ∙ 퐶퐷푣 ∙ 퐮 퐮 ∙ 퐿(푥, 푦, 푧) SAV-induced drag force Turbulence closure equations: SAV-induced additional source term 퐷퐾 휕 휕퐾 turbulent kinetic energy 퐾: = 휈휓 + 휈푀2 + 휇푁2 − 휀 + 푐 ∙ 0.5 ∙ 퐷 ∙ 푁 ∙ 퐶 ∙ 퐮 3ℋ 푧 − 푧 퐷푡 휕푧 푘 휕푧 푓푘 푣 푣 퐷푣 푣 퐷휓 휕 휕휓 휓 휓 generic length-scale variable 휓: = 휈 + (푐 휈푀2 + 푐 휇푁2 − 푐 퐹 휀) + (푐 ∙ 0.5 ∙ 퐷 ∙ 푁 ∙ 퐶 ∙ 퐮 3ℋ 푧 − 푧 ) 퐷푡 휕푧 휓 휕푧 퐾 휓1 휓2 휓3 푤 퐾 푓휓 푣 푣 퐷푣 푣 2 where Dv is the stem diameter (m), Nv is vegetation density (number of stems per m ), CDv is a bulk drag coefficient with a typical value of 1.13 (Garcia et al. 2004; Nepf and Vivoni, 2000) and 퐿 is a step function. SAV impact on hydrodynamic is incorporated implicitly into the SCHISM hydrodynamics part by Zhang et al. (2019), in order to avoid the stringent stability constraints associated with this term. 5 Background Model developments Model implementations Results Discussions Summary Fully-coupled ICM-VEG model 6 Background Model developments Model implementations Results Discussions Summary SAV component • Three components of SAV biomass: leaf, stem and root. • Leaf is the photosynthetic portion of the above-ground plant biomass. o Growth of leaf is a function of temperature, light and nutrient limitation. • Stem is the structural, non- photosynthetic portions of the above-ground plant biomass. • Root is the below-ground portions of the plant biomass associated with anchoring the plant and with nutrient uptake 7 Background Model developments Model implementations Results Discussions Summary Formulations of the SAV biomass 푑퐿퐹 = 푃푙푓 ∙ 1 − 퐹푎푚 ∙ 퐹푃푙푓 ∙ 퐿퐹 − 퐵푀푙푓 ∙ 퐿퐹 푑푡 푑 푆푇 = 푃푙푓 ∙ 1 − 퐹푎푚 ∙ 퐹푃푠푡 ∙ 퐿퐹 − 퐵푀푠푡 ∙ 푆푇 State variables: 푑푡 푳푭, 푺푻, 푹푻 are biomasses of leaves, stems, 푑 푅푇 −3 = 푃푙푓 ∙ 1 − 퐹푎푚 ∙ 퐹푃푟푡 ∙ 퐿퐹 − 퐵푀푟푡 ∙ 푅푇 and roots (g C m ); 푑푡 퐻푐푎푛 = min(푤푑푒푝, 푟푙푓 ∙ 퐿퐹 + 푟푠푡 ∙ 푆푇 + 푟푟푡 ∙ 푅푇 + ℎ푐푎푛푠푎푣0) Parameters: • 푃푙푓 푎푛푑 푃푒푝 are leaf production rate (d−1). • 퐹푎푚, 퐹푃푙푓, 퐹푃푠푡, 퐹푃푟푡 are fractions of production devoted to active metabolism, routed to leaf, stem, and root biomass. • 퐵푀푙푓, 퐵푀푠푡, 퐵푀푟푡 are basal metabolism (d−1). • 푟푙푓, 푟푠푡, 푟푟푡, ℎ푐푎푛푠푎푣0 are coefficients to transfer SAV biomass to canopy height. 푤푑푒푝 is water depth. 8 Background Model developments Model implementations Results Discussions Summary Interactions of SAV and light −2 −1 • 퐼푤푐 is the irradiance at certain layer (E m d ); 퐼0 is surface irradiance; 퐼푛 is irradiance at the bottom of vertical layer n. • 퐾푒 is total diffuse light attenuation (m−1); 퐾푤 is diffuse light attenuation in layers without SAV (m−1); 퐾푠ℎ is light attenuation by SAV absorption (m2 g−1 C). 퐼0 퐾푒 = 퐾푤 = 퐾푏 + 퐾푇푆푆 ∙ 푇푆푆 + 푲푪풉풍 ∙ 푪풉풍 퐼푛−1 −퐾푒∙푑푒푝푛 퐼푤푐 = 퐼푛−1 ∙ 푒 2푑푒푝푛 퐾푒 = 퐾푤 + 푲풔풉 ∙ (푳푭 + 푺푻) 퐼푛 퐼푛푣 9 Study area Bathymetry (m) Cache Slough Complex • Cut out from the Bay-Delta grid. • Complex geometry with large shallow habitat and deep channels • Influence by both tide and flow discharges 10 Background Model developments Model implementations Results Discussions Summary Study area • Little Hastings Tract and French Island, two of the selected locations for this study, are hydrologically connected to Liberty Island and have been consistently infested with SAV in recent years (Shruti Khanna, CDFW). • For model initiation and validation, we mostly use the observed SAV distributions. • French Island (no herbicide treatment) and Little Hastings Tract (treated) are chosen for comparison. But French Island is not included in the current model domain. DWR report, 2017 11 Background Model developments Model implementations Results Discussions Summary Model experiments Impacts of SAV on hydrodynamics and SAV removal water quality Local biological impacts of SAV With SAV but no impacts on hydrodynamics Significance of feedback effects of SAV to hydrodynamics. Base Case: Dynamic feedback 12 Background Model developments Model implementations Results Discussions Summary Model calibrations • The elevation is mainly controlled by the boundary condition and fits the observation in Cache Slough. • Salinity is low in this area and the model simulation matches the observed temporal variations. The modelled temperature agrees with the observations. • Overall, the model catches the magnitude of the chlorophyll-a concentration. • It matches both the pattern and magnitude of the dissolved oxygen. • The nutrient concentrations agree well with the observations well in terms of temporal variations and values. 13 Background Model developments Model implementations Results Discussions Summary SAV biomass and distributions • Start from uniform biomass 100 g/m2. Channel • Declines by half in 60 days in channels. • Almost completely disappears in 180 days. Shoal • Growth in shallow regions • Clear summer-fall bloom pattern 14 Impacts of SAV on flow fields • Flow is more channelized • Flow velocity is larger in areas without SAV • Flow velocity is largely reduced over SAV beds • The difference of velocity magnitude can be 0.2 m s-1 15 Background Model developments Model implementations Results Discussions Summary Impacts of SAV on water quality • Chl-a increases in local SAV beds while decreases in the rest area • SAV increases DO locally from production of both SAV and increased phytoplankton + • NH4 decreases due to local uptake in the SAV beds, while increases outside the SAV beds 16 Background Model developments Model implementations Results Discussions Summary Phytoplankton Biomass VS. SAV Canopy Height Shoal Area: Shoal Area: • SAV stays emergent. With the presence of SAV, fluctuation of •phytoplanktonShading is significant concentrationto block is greatly reduced. light supply. Median Depth Area: Median Depth Area: • SAV stays submerged with 0.5m In the presence of SAV, the phytoplankton hasin height.double blooms in early spring and late fall, while its concentration• isSAV lowerdoes in notsummer.limit the light supply above the canopy. Deep Channel Area: Deep Channel Area: There is a small decrease in the phytoplankton• No concentrationSAV survived inwithdeepsamechannels. fluctuation. 17 Nutrient Concentration and Bottom Flux Ammonia Concentration Ammonia Bottom Flux Shoal Area: • With SAV nutrient has smaller fluctuations but is not limited for the growth of phytoplankton or SAV. • SAV plays a significant role in decreasing the recycling inorganic nutrients. Median Depth Area: • With SAV the nutrient is lower in winter but still unlimited for the phytoplankton bloom, while in summer, the nutrient is used up. • Nutrient supply limits the growth of both SAV and phytoplankton since late spring to late fall. Deep Channel Area: • There is slight decrease of nutrients. 18 Phytoplankton Local Growth Rates Green Algae Local Growth Rate Shoal Area: • With SAV, local growth rate decreases to almost zero. • Light limitation is the main reason while nutrient is not limited. Median Depth Area: • With SAV, local growth rate is reduced from late spring. • Nutrient limitation is dominant. Deep Channel Area: • Similar local growth rates with or without SAV 19 Horizontal Phytoplankton Transport Horizontal Velocity Magnitude Surface Elevation Shoal and Median Depth Areas: • Horizontal velocity decreases significantly with SAV. • Elevation remains almost unchanged. • Horizontal biomass transport is largely reduced in these areas. Deep Channel Area: • Horizontal velocity increases. • Flushing increases in this areas. 20 Pattern of SAV-phytoplankton interactions Less Flushing 2m • Phytoplankton accumulates with low flushing. 4m • Phytoplankton double blooms in early spring with • Light limits local low flushing and late fall with nutrient available. phytoplankton • SAV blocks bottom nutrient bottom flux, and limits growth. local phytoplankton growth since late spring. Deep Channel Median Depth Area Shoal 21 Local biological impacts of SAV on water quality Phytoplankton: • SAV decrease phytoplankton biomass. • Less than 18.5%
Load more

Recommended publications
  • 0 5 10 15 20 Miles Μ and Statewide Resources Office
    Woodland RD Name RD Number Atlas Tract 2126 5 !"#$ Bacon Island 2028 !"#$80 Bethel Island BIMID Bishop Tract 2042 16 ·|}þ Bixler Tract 2121 Lovdal Boggs Tract 0404 ·|}þ113 District Sacramento River at I Street Bridge Bouldin Island 0756 80 Gaging Station )*+,- Brack Tract 2033 Bradford Island 2059 ·|}þ160 Brannan-Andrus BALMD Lovdal 50 Byron Tract 0800 Sacramento Weir District ¤£ r Cache Haas Area 2098 Y o l o ive Canal Ranch 2086 R Mather Can-Can/Greenhead 2139 Sacramento ican mer Air Force Chadbourne 2034 A Base Coney Island 2117 Port of Dead Horse Island 2111 Sacramento ¤£50 Davis !"#$80 Denverton Slough 2134 West Sacramento Drexler Tract Drexler Dutch Slough 2137 West Egbert Tract 0536 Winters Sacramento Ehrheardt Club 0813 Putah Creek ·|}þ160 ·|}þ16 Empire Tract 2029 ·|}þ84 Fabian Tract 0773 Sacramento Fay Island 2113 ·|}þ128 South Fork Putah Creek Executive Airport Frost Lake 2129 haven s Lake Green d n Glanville 1002 a l r Florin e h Glide District 0765 t S a c r a m e n t o e N Glide EBMUD Grand Island 0003 District Pocket Freeport Grizzly West 2136 Lake Intake Hastings Tract 2060 l Holland Tract 2025 Berryessa e n Holt Station 2116 n Freeport 505 h Honker Bay 2130 %&'( a g strict Elk Grove u Lisbon Di Hotchkiss Tract 0799 h lo S C Jersey Island 0830 Babe l Dixon p s i Kasson District 2085 s h a King Island 2044 S p Libby Mcneil 0369 y r !"#$5 ·|}þ99 B e !"#$80 t Liberty Island 2093 o l a Lisbon District 0307 o Clarksburg Y W l a Little Egbert Tract 2084 S o l a n o n p a r C Little Holland Tract 2120 e in e a e M Little Mandeville
    [Show full text]
  • Transitions for the Delta Economy
    Transitions for the Delta Economy January 2012 Josué Medellín-Azuara, Ellen Hanak, Richard Howitt, and Jay Lund with research support from Molly Ferrell, Katherine Kramer, Michelle Lent, Davin Reed, and Elizabeth Stryjewski Supported with funding from the Watershed Sciences Center, University of California, Davis Summary The Sacramento-San Joaquin Delta consists of some 737,000 acres of low-lying lands and channels at the confluence of the Sacramento and San Joaquin Rivers (Figure S1). This region lies at the very heart of California’s water policy debates, transporting vast flows of water from northern and eastern California to farming and population centers in the western and southern parts of the state. This critical water supply system is threatened by the likelihood that a large earthquake or other natural disaster could inflict catastrophic damage on its fragile levees, sending salt water toward the pumps at its southern edge. In another area of concern, water exports are currently under restriction while regulators and the courts seek to improve conditions for imperiled native fish. Leading policy proposals to address these issues include improvements in land and water management to benefit native species, and the development of a “dual conveyance” system for water exports, in which a new seismically resistant canal or tunnel would convey a portion of water supplies under or around the Delta instead of through the Delta’s channels. This focus on the Delta has caused considerable concern within the Delta itself, where residents and local governments have worried that changes in water supply and environmental management could harm the region’s economy and residents.
    [Show full text]
  • Transitions for the Delta Economy
    Transitions for the Delta Economy January 2012 Josué Medellín-Azuara, Ellen Hanak, Richard Howitt, and Jay Lund with research support from Molly Ferrell, Katherine Kramer, Michelle Lent, Davin Reed, and Elizabeth Stryjewski Supported with funding from the Watershed Sciences Center, University of California, Davis Summary The Sacramento-San Joaquin Delta consists of some 737,000 acres of low-lying lands and channels at the confluence of the Sacramento and San Joaquin Rivers (Figure S1). This region lies at the very heart of California’s water policy debates, transporting vast flows of water from northern and eastern California to farming and population centers in the western and southern parts of the state. This critical water supply system is threatened by the likelihood that a large earthquake or other natural disaster could inflict catastrophic damage on its fragile levees, sending salt water toward the pumps at its southern edge. In another area of concern, water exports are currently under restriction while regulators and the courts seek to improve conditions for imperiled native fish. Leading policy proposals to address these issues include improvements in land and water management to benefit native species, and the development of a “dual conveyance” system for water exports, in which a new seismically resistant canal or tunnel would convey a portion of water supplies under or around the Delta instead of through the Delta’s channels. This focus on the Delta has caused considerable concern within the Delta itself, where residents and local governments have worried that changes in water supply and environmental management could harm the region’s economy and residents.
    [Show full text]
  • Comparing Futures for the Sacramento-San Joaquin Delta
    comparing futures for the sacramento–san joaquin delta jay lund | ellen hanak | william fleenor william bennett | richard howitt jeffrey mount | peter moyle 2008 Public Policy Institute of California Supported with funding from Stephen D. Bechtel Jr. and the David and Lucile Packard Foundation ISBN: 978-1-58213-130-6 Copyright © 2008 by Public Policy Institute of California All rights reserved San Francisco, CA Short sections of text, not to exceed three paragraphs, may be quoted without written permission provided that full attribution is given to the source and the above copyright notice is included. PPIC does not take or support positions on any ballot measure or on any local, state, or federal legislation, nor does it endorse, support, or oppose any political parties or candidates for public office. Research publications reflect the views of the authors and do not necessarily reflect the views of the staff, officers, or Board of Directors of the Public Policy Institute of California. Summary “Once a landscape has been established, its origins are repressed from memory. It takes on the appearance of an ‘object’ which has been there, outside us, from the start.” Karatani Kojin (1993), Origins of Japanese Literature The Sacramento–San Joaquin Delta is the hub of California’s water supply system and the home of numerous native fish species, five of which already are listed as threatened or endangered. The recent rapid decline of populations of many of these fish species has been followed by court rulings restricting water exports from the Delta, focusing public and political attention on one of California’s most important and iconic water controversies.
    [Show full text]
  • Structured Decision Making for Delta Smelt Demo Project
    Structured Decision Making for Delta Smelt Demo Project Prepared for CSAMP/CAMT Project funded by State and Federal Water Contractors Prepared by Graham Long and Sally Rudd Compass Resource Management Ltd. 604.641.2875 Suite 210- 111 Water Street Vancouver, British Columbia Canada V6B 1A7 www.compassrm.com Date May 4, 2018 April 13th – reviewed by TWG and comments incorporated Table of Contents Table of Contents ............................................................................................................... i Executive Summary .......................................................................................................... iii Introduction ...................................................................................................................... 1 Approach .......................................................................................................................... 1 Problem Definition ........................................................................................................... 4 Objectives ......................................................................................................................... 5 Alternatives ...................................................................................................................... 9 Evaluation of Trade-offs ................................................................................................. 17 Discussion and Recommendations ................................................................................
    [Show full text]
  • California Regional Water Quality Control Board Central Valley Region Karl E
    California Regional Water Quality Control Board Central Valley Region Karl E. Longley, ScD, P.E., Chair Linda S. Adams Arnold 11020 Sun Center Drive #200, Rancho Cordova, California 95670-6114 Secretary for Phone (916) 464-3291 • FAX (916) 464-4645 Schwarzenegger Environmental http://www.waterboards.ca.gov/centralvalley Governor Protection 18 August 2008 See attached distribution list DELTA REGIONAL MONITORING PROGRAM STAKEHOLDER PANEL KICKOFF MEETING This is an invitation to participate as a stakeholder in the development and implementation of a critical and important project, the Delta Regional Monitoring Program (Delta RMP), being developed jointly by the State and Regional Boards’ Bay-Delta Team. The Delta RMP stakeholder panel kickoff meeting is scheduled for 30 September 2008 and we respectfully request your attendance at the meeting. The meeting will consist of two sessions (see attached draft agenda). During the first session, Water Board staff will provide an overview of the impetus for the Delta RMP and initial planning efforts. The purpose of the first session is to gain management-level stakeholder input and, if possible, endorsement of and commitment to the Delta RMP planning effort. We request that you and your designee attend the first session together. The second session will be a working meeting for the designees to discuss the details of how to proceed with the planning process. A brief discussion of the purpose and background of the project is provided below. In December 2007 and January 2008 the State Water Board, Central Valley Regional Water Board, and San Francisco Bay Regional Water Board (collectively Water Boards) adopted a joint resolution (2007-0079, R5-2007-0161, and R2-2008-0009, respectively) committing the Water Boards to take several actions to protect beneficial uses in the San Francisco Bay/Sacramento-San Joaquin Delta Estuary (Bay-Delta).
    [Show full text]
  • Subsidence Reversal for Tidal Reconnection
    PERFORMANCE MEASURE 4.12: SUBSIDENCE REVERSAL FOR TIDAL RECONNECTION Performance Measure 4.12: Subsidence Reversal for Tidal Reconnection Performance Measure (PM) Component Attributes Type: Output Performance Measure Description 1 Subsidence reversal 0F activities are located at shallow subtidal elevations to prevent net loss of future opportunities to restore tidal wetlands in the Delta and Suisun Marsh. Expectations Preventing long-term net loss of land at intertidal elevations in the Delta and Suisun Marsh from impacts of sea level rise and land subsidence. Metric 1. Acres of Delta and Suisun Marsh land with subsidence reversal activity located on islands with large areas at shallow subtidal elevations. This metric will be reported annually. 2. Average elevation accretion at each project site presented in centimeters per year. This metric will be reported every five years. Baseline 1. In 2019, zero acres of subsidence reversal on islands with large areas at shallow subtidal elevations. 2. Short-term elevation accretion in the Delta at 4 centimeters per year. 1 Subsidence reversal is a process that halts soil oxidation and accumulates new soil material in order to increase land elevations. Examples of subsidence reversal activities are rice cultivation, managed wetlands, and tidal marsh restoration. DELTA PLAN, AMENDED – PRELIMINARY DRAFT NOVEMBER 2019 1 PERFORMANCE MEASURE 4.12: SUBSIDENCE REVERSAL FOR TIDAL RECONNECTION Target 1. By 2030, 3,500 acres in the Delta and 3,000 acres in Suisun Marsh with subsidence reversal activities on islands, with at least 50 percent of the area or with at least 1,235 acres at shallow subtidal elevations. 2. An average elevation accretion of subsidence reversal is at least 4 centimeters per year up to 2050.
    [Show full text]
  • 2. the Legacies of Delta History
    2. TheLegaciesofDeltaHistory “You could not step twice into the same river; for other waters are ever flowing on to you.” Heraclitus (540 BC–480 BC) The modern history of the Delta reveals profound geologic and social changes that began with European settlement in the mid-19th century. After 1800, the Delta evolved from a fishing, hunting, and foraging site for Native Americans (primarily Miwok and Wintun tribes), to a transportation network for explorers and settlers, to a major agrarian resource for California, and finally to the hub of the water supply system for San Joaquin Valley agriculture and Southern California cities. Central to these transformations was the conversion of vast areas of tidal wetlands into islands of farmland surrounded by levees. Much like the history of the Florida Everglades (Grunwald, 2006), each transformation was made without the benefit of knowing future needs and uses; collectively these changes have brought the Delta to its current state. Pre-European Delta: Fluctuating Salinity and Lands As originally found by European explorers, nearly 60 percent of the Delta was submerged by daily tides, and spring tides could submerge it entirely.1 Large areas were also subject to seasonal river flooding. Although most of the Delta was a tidal wetland, the water within the interior remained primarily fresh. However, early explorers reported evidence of saltwater intrusion during the summer months in some years (Jackson and Paterson, 1977). Dominant vegetation included tules—marsh plants that live in fresh and brackish water. On higher ground, including the numerous natural levees formed by silt deposits, plant life consisted of coarse grasses; willows; blackberry and wild rose thickets; and galleries of oak, sycamore, alder, walnut, and cottonwood.
    [Show full text]
  • Cache Slough Comprehensive Regional Planning: DRAFT Baseline Characterization Report for the Advancement of Proposition 1 Eligible Projects
    Cache Slough Comprehensive Regional Planning: DRAFT Baseline Characterization Report for the Advancement of Proposition 1 Eligible Projects DRAFT Final Phase 1 Report July 2017 Introduction 1 SECTION 1: Project Purpose and Objectives 3 Phase 1 Objectives 3 Related Programs 3 SECTION 2: Planning Process and Participants 5 CONTENTS CONTENTS Process and Roadmap 5 Related Activities 6 SECTION 3: Baseline Conditions and Data Tools 7 Data Management Tools 7 MapTerra 7 R Shiny 7 Data Review and Validation 7 Data Inclusion Criteria 7 Topic Areas 8 Agriculture 8 Water Management 11 Flood Management 15 Ecosystem 18 Other Land Use and Infrastructure 24 Data Integration and Visualization 26 SECTION 4: Major Topics and Issues 28 Phase 1 Purpose and Charter 28 Project Scale and Level of Detail 29 Participation, Engagement, and Communications 29 Data Sources and Accuracy 29 Relationship to Other Programs and Activities 30 Ecosystem Potential 30 Protection and Assurances for Afected Landowners and Resources 31 Phase 2 Purpose, Scope, and Schedule 31 SECTION 5: Conclusions and Recommendations 33 Findings and Conclusions 33 Collaborative Process 33 Data and Information Display and Visualization 34 Phase 2 Goals and Approach 35 Key Issues for Phase 2 35 Other Recommendations 36 Appendices 37 Appendix A – Phase 1 Participants 38 Appendix B – Project Overview 39 Appendix C – Draft High-level Management Issues and Questions 44 Appendix D – Agriculture Layers Metadata 46 Appendix E – Water Supply and Water Quality Layers Metadata 51 Appendix F – Flood Management Layers Metadata 55 Appendix G – Ecosystem Layers Metadata 58 Appendix H – Other Land Use and Infrastructure Layers Metadata 68 Introduction This report summarizes Phase 1 of the Cache Slough Comprehensive Regional Planning Project for the Advancement of Proposition 1 Eligible Projects (Cache Slough Planning Project).
    [Show full text]
  • Subsidence Reversal for Tidal Reconnection
    PERFORMANCE MEASURE 4.12. SUBSIDENCE REVERSAL FOR TIDAL RECONNECTION Performance Measure 4.12: Subsidence Reversal for Tidal Reconnection Performance Measure (PM) Component Attributes Type: Output Performance Measure Description Subsidence reversal1 activities are located at shallow subtidal elevations to prevent net loss of future opportunities to restore intertidal wetlands through tidal reconnection in the Delta and Suisun Marsh. Expectations Preventing long-term net loss of land at intertidal elevations in the Delta and Suisun Marsh from impacts of sea level rise and land subsidence. Metric 1. Acres of Delta and Suisun Marsh land with subsidence reversal activity located on islands with large areas at shallow subtidal elevations. This metric will be reported annually. 2. Average elevation accretion at each project site presented in centimeters per year. This metric will be reported every five years. Tracking will continue until a project is tidally reconnected. Baseline 1. In 2019, zero acres of subsidence reversal on islands with large areas at shallow subtidal elevations. 2. Soils in the Delta are subsiding at a rate of between 0 cm/year and 1.8 cm/year. 1 Subsidence reversal is a process that halts soil oxidation and accumulates new soil material in order to increase land elevations. Examples of subsidence reversal activities are rice cultivation, managed wetlands, and tidal marsh restoration. DELTA PLAN, AMENDED – DRAFT MAY 2020 1 PERFORMANCE MEASURE 4.12. SUBSIDENCE REVERSAL FOR TIDAL RECONNECTION Target 1. By 2030, 3,500 acres in the Delta and 3,000 acres in Suisun Marsh with subsidence reversal activities on islands with at least 50 percent of the area or at least 1,235 acres at shallow subtidal elevations.
    [Show full text]
  • Pdf Format, Entire Report in One File
    INTEGRATED ECONOMIC-ENGINEERING ANALYSIS OF CALIFORNIA'S FUTURE WATER SUPPLY Report for the State of California Resources Agency, Sacramento, California Richard E. Howitt, Jay R. Lund, Kenneth W. Kirby, Marion W. Jenkins, Andrew J. Draper, Pia M. Grimes, Kristen B. Ward, Matthew D. Davis, Brad D. Newlin, Brian J. Van Lienden, Jennifer L. Cordua, and Siwa M. Msangi Department of Agricultural and Resource Economics Department of Civil and Environmental Engineering University of California, Davis CHAPTERS APPENDICES Title Page A. Statewide Water and Agricultural Production Table of Contents Model Preface B. Urban Value Function Documentation Executive Summary C. HEC-PRM Application Documentation 1. Introduction D. CALVIN Data Management 2. California's Water Scarcity Problems E. Post-Processor Object-Oriented Design 3. Current Statewide Infrastructure Options F. Environmental Constraints 4. Finance and Operation Policy Options G. CALVIN Operating Costs 5. Legal Issues for the Market Financing of H. Surface Water Facilities California Water I. Surface Water Hydrology 6. Economic Analysis of Statewide Water Facilities J. Groundwater Hydrology 7. Strategy for Comparing Alternatives K. Irrigation Water Requirements 8. Preliminary CALVIN Results L. Glossary 9. Accomplishments, Lessons, and Future Directions 10. Conclusions References Acronyms Software and Data Appendix CALVIN Network Schematic (green text = to be finished at a later date) INTEGRATED ECONOMIC-ENGINEERING ANALYSIS OF CALIFORNIA'S FUTURE WATER SUPPLY Richard E. Howitt Jay R. Lund Kenneth W. Kirby Marion W. Jenkins Andrew J. Draper Pia M. Grimes Matthew D. Davis Kristen B. Ward Brad D. Newlin Brian J. Van Lienden Jennifer L. Cordua Siwa M. Msangi Department of Agricultural and Resource Economics Department of Civil and Environmental Engineering University of California, Davis 95616 a report for the State of California Resources Agency Sacramento, California August 1999 TABLE OF CONTENTS Preface……………………………………………………………………………………..
    [Show full text]
  • Overview of the Arkstorm Scenario
    OOvveerrvviieeww ooff tthhee kkSSttoorrmm SScceennaarriioo AARR Open File Report 2010-1312 U.S. Department of the Interior U.S. Geological Survey This page intentionally left blank Overview of the Arkstorm Scenario Prepared for the U.S. Geological Survey Multihazards Demonstration Project Lucile Jones, Chief Scientist Dale Cox, Project Manager By Keith Porter18, Anne Wein17, Charles Alpers17, Allan Baez1, Patrick Barnard17, James Carter17, Alessandra Corsi7, James Costner20, Dale Cox17, Tapash Das14, Michael Dettinger17, James Done12, Charles Eadie8, Marcia Eymann5, Justin Ferris17, Prasad Gunturi20, Mimi Hughes13, Robert Jarrett17, Laurie Johnson10, Hanh Dam Le-Griffin16, David Mitchell11, Suzette Morman17, Paul Neiman13, Anna Olsen18, Suzanne Perry17, Geoffrey Plumlee17, Martin Ralph13, David Reynolds13, Adam Rose19, Kathleen Schaefer6, Julie Serakos20, William Siembieda4, Jonath n Stock17, David Strong17, Ian Sue Wing2, Alex Tang9, Pete Thomas20, Ken Topping15, and Chris Wills3. a 1 B.A. Risk Management 11 M-Cubed 2 Boston University 12 National Center for Atmospheric Research 3 California Geological Survey 13 National Oceanic and Atmospheric Administration 4 California Polytechnic State University 14 Scripps Institute of Oceanography 5 Center for Sacramento History 15 Topping Associates International 6 Federal Emergency Management Agency 16 TTW, Inc. 7 Instituto de Pesquisas Tecnologicas, Brazil 17 U.S. Geological Survey 8 Hamilton Swift Land Use and Development 18 University of Colorado at Boulder 9 L&T Consulting 19 University of
    [Show full text]