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Dusterhoff, S. D.; Doehring, C.; Shusterman, G. 2014. How Creeks Meet the Bay: Changing Interfaces (Interactive web map).

San Francisco Bay’s connections to local creeks are integral to its health. These fluvial-tidal (F-T) interfaces are the points of delivery for freshwater, sediment, contaminants, and nutrients. The ways in which the F-T interface has changed affect flooding dynamics, ecosystem functioning, and resilience to a changing climate. As the historical baylands have been altered, the majority of contemporary F-T interface types have changed leading to additional F-T interface types within the present-day landscape. Illustrations of each F-T interface type and methods for classification are available here

This project is part of Flood Control 2.0. For further information please visit this project page

Dusterhoff, S. D.; Doehring, C.; Baumgarten, S.; Grossinger, R. M.; Askevold, R. A. 2016. Resilient Landscape Vision for Lower Walnut Creek: Baseline Information and Management Strategies. Flood Control 2.0. An SFEI-ASC Resilient Landscape Program report developed in cooperation with the Flood Control 2.0 Regional Science Advisors and Contra Costa County Flood Control and Water Conservation District. SFEI Contribution No. 782. San Francisco Estuary Institute-Aquatic Science Center: Richmond, CA.

Lower Walnut Creek (Contra Costa County, CA) and its surrounding landscape have undergone considerable land reclamation and development since the mid-nineteenth century. In 1965, the lower 22 miles of Walnut Creek and the lower reaches of major tributaries were converted to flood control channels to protect the surrounding developed land. In the recent past, sediment was periodically removed from the lower Walnut Creek Flood Control Channel to provide flow capacity and necessary flood protection. Due to the wildlife impacts and costs associated with this practice, the Contra Costa County Flood Control and Water Conservation District (District) is now seeking a new channel management approach that works with natural processes and benefits people and wildlife in a cost-effective manner. Flood Control 2.0 project scientists and a Regional Science Advisory Team (RSAT) worked with the District to develop a long-term management Vision for lower Walnut Creek that could result in a multi-benefit landscape that restores lost habitat and is resilient under a changing climate.

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Dusterhoff, S.; Shaw, S.; McKnight, K. 2021. Flood Control Channel Classification Scheme for the San Francisco Bay Region. Josh Collins, Ed.. San Francisco Bay Region Flood Control Channel Classification . SFEI Contribution No. 1046. San Francisco Estuary Institute: Richmond, CA.
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Dusterhoff, S.; Pearce, S.; McKee, L. J. .; Doehring, C.; Beagle, J.; McKnight, K.; Grossinger, R.; Askevold, R. A. 2017. Changing Channels: Regional Information for Developing Multi-benefit Flood Control Channels at the Bay Interface. Flood Control 2.0. SFEI Contribution No. 801. San Francisco Estuary Institute: Richmond, CA.

Over the past 200 years, many of the channels that drain to San Francisco Bay have been modified for land reclamation and flood management. The local agencies that oversee these channels are seeking new management approaches that provide multiple benefits and promote landscape resilience. This includes channel redesign to improve natural sediment transport to downstream bayland habitats and beneficial re-use of dredged sediment for building and sustaining baylands as sea level continues to rise under a changing climate. Flood Control 2.0 is a regional project that was created to help develop innovative approaches for integrating habitat improvement and resilience into flood risk management at the Bay interface. Through a series of technical, economic, and regulatory analyses, the project addresses some of the major elements associated with multi-benefit channel design and management at the Bay interface and provides critical information that can be used by the management and restoration communities to develop long-term solutions that benefit people and wildlife.

This Flood Control 2.0 report provides a regional analysis of morphologic change and sediment dynamics in flood control channels at the Bay interface, and multi-benefit management concepts aimed at bringing habitat restoration into flood risk management. The findings presented here are built on a synthesis of historical and contemporary data that included input from Flood Control 2.0 project scientists, project partners, and science advisors. The results and recommendations, summarized below, will help operationalize many of the recommendations put forth in the Baylands Ecosystem Habitat Goals Science Update (Goals Project 2015) and support better alignment of management and restoration communities on multi-benefit bayland management approaches.

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Dusterhoff, S.; McKnight, K.; Grenier, L.; Kauffman, N. 2021. Sediment for Survival: A Strategy for the Resilience of Bay Wetlands in the Lower San Francisco Estuary. SFEI Contribution No. 1015. San Francisco Estuary Institute: Richmond, CA.

This report analyses current data and climate projections to determine how much natural sediment may be available for tidal marshes and mudflats and how much supplemental sediment may be needed under different future scenarios. These sediment supply and demand estimates are combined with scientific knowledge of natural physical and biological processes to offer a strategy for sediment delivery that will allow these wetlands to survive a changing climate and provide benefits to people and nature for many decades to come. The approach developed in this report may also be useful beyond San Francisco Bay because shoreline protection, flood risk-management, and looming sediment deficits are common issues facing coastal communities around the world.

The resilience of San Francisco Bay shore habitats, such as tidal marshes and mudflats, is essential to all who live in the Bay Area. Tidal marshes and tidal flats (also known as mudflats) are key components of the shore habitats, collectively called baylands, which protect billions of dollars of bay-front housing and infrastructure (including neighborhoods, business parks, highways, sewage treatment plants, and landfills). They purify the Bay’s water, support endangered wildlife, nurture fisheries, and provide people access to nature within the urban environment. Bay Area residents showed their commitment to restoring these critical habitats when they voted for a property tax to pay for large-scale tidal marsh restoration. However, climate change poses a great threat, because there may not be enough natural sediment supply for tidal marshes and mudflats to gain elevation fast enough to keep pace with sea-level rise.

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Dusterhoff, S.; Whipple, A.; Baumgarten, S.; Robinson, A.; Shaw, S.; Stark, K.; Askevold, R. 2023. Restoration Plan for the Laguna de Santa Rosa. SFEI Contribution No. 1123. San Francisco Estuary Institute: Richmond, CA.

The Laguna de Santa Rosa is an expansive freshwater wetland complex that hosts a rich diversity of plant and wildlife species, and is also home to a thriving agricultural community. Since the mid-19th century, modifications to the Laguna and its surrounding landscape have degraded habitat conditions for both wildlife and people. Together with partners at the Laguna de Santa Rosa Foundation, and funded by Sonoma Water and the California Department of Fish and Wildlife, the goal of the Laguna de Santa Rosa Master Restoration Plan project is to develop a plan that supports ecosystem services in the Laguna—through the restoration and enhancement of landscape processes that form and sustain habitats and improve water quality—while considering flood management issues and the productivity of agricultural lands. 

The first phase of the project was the creation of the Restoration Vision for the Laguna de Santa Rosa. The report details a long-term vision for the landscape which highlights opportunities for multi-benefit habitat restoration and land management within the Laguna’s 100-year floodplain. It presents an understanding of the landscape functioning from past, present, and potential future perspectives. Starting with a picture of the historical ecology of the Laguna that details the magnitude of change in habitat conditions over the past two centuries, the document then presents an understanding of key physical processes that affect today’s Laguna. The restoration concepts described in the Vision represent a potential future Laguna, and were developed and vetted through a series of workshops in which technical advisers, management advisers, tribal representatives, and local landowners and stakeholders shared their expertise and helped shape the concepts. 

The second phase of this project was the development of a Restoration Plan for the Laguna de Santa Rosa that was built from the Vision. The Restoration Plan was developed through a collaborative process that focused on moving forward identified restoration opportunities into conceptual designs that can be used to establish implementable restoration projects. The Restoration Plan includes the following elements:

  • A restoration framework that offers a planning structure for landscape scale restoration that can be further developed and refined over time.
  • Restoration project concepts in the Laguna’s 100-year floodplain developed from selected restoration opportunity areas shown in the Vision.
  • Criteria for prioritizing and sequencing restoration project concepts.

The utilization of the Restoration Plan and the ultimate success of restoration efforts in the Laguna will require local landowner support and adequate funding to implement the restoration and manage and sustain the benefits through long-term stewardship. It will also require coordination among all the agencies responsible for managing the land and water within the Laguna and its surrounding watershed. With commitment and collaboration the Laguna

 

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