Tidal Wetland Restoration in San Francisco Bay: History and Current Issues

Estuary, San Francisco; Callaway, John C.; Thomas, V J; Michael, C

doi:10.15447/sfews.2011v9iss3art2

Cited by 23 publications

(22 citation statements)

References 50 publications

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“…Marsh restoration projects have become popular in the last years to protect inland from sea level rise. However, marshes need fine sediment to be able to grow and adjust to sea level rise (Boumans et al 2002;Callaway et al 2011;Fagherazzi et al 2012;Prescott and Tsanis 1997).…”

Section: Introductionmentioning

confidence: 99%

Suspended sediment dynamics in a tidal channel network under peak river flow

Achete¹,

Wegen²,

Roelvink

et al. 2016

Ocean Dynamics

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Peak river flows transport fine sediment, nutrients, and contaminants that may deposit in the estuary. This study explores the importance of peak river flows on sediment dynamics with special emphasis on channel network configurations. The Sacramento-San Joaquin Delta, which is connected to San Francisco Bay (California, USA), motivates this study and is used as a validation case. Besides data analysis of observations, we applied a calibrated process-based model (D-Flow FM) to explore and analyze high-resolution (∼100 m, ∼1 h) dynamics. Peak river flows supply the vast majority of sediment into the system. Data analysis of six peak flows (between 2012 and 2014) shows that on average, 40 % of the input sediment in the system is trapped and that trapping efficiency depends on timing and magnitude of river flows. The model has 90 % accuracy reproducing these trapping efficiencies. Modeled deposition patterns develop as the result of peak river flows after which, during low river flow conditions, tidal currents are not able to significantly redistribute deposited sediment. Deposition is quite local and mainly takes place at a deep junction. Tidal movement is important for sediment resuspension, but river induced, tide residual currents are responsible for redistributing the sediment towards the river banks and to the bay. We applied the same forcing for four different channel configurations ranging from a full delta network to a schematization of the main river. A higher degree of network schematization leads to higher peak-sediment export downstream to the bay. However, the area of sedimentation is similar for all the configurations because it is mostly driven by geometry and bathymetry.

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Section: Introductionmentioning

confidence: 99%

Suspended sediment dynamics in a tidal channel network under peak river flow

Achete¹,

Wegen²,

Roelvink

et al. 2016

Ocean Dynamics

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“…Tidal marsh restoration design and planning has evolved in the last decade, with projects increasing in size and complexity. However, few undisturbed reference sites remain, and there is still considerable scientific uncertainty about how to restore marsh habitat (Callaway et al 2011).…”

Section: Site Descriptionmentioning

confidence: 99%

An appraisal of adaptive management planning and implementation in ecological restoration: case studies from the San Francisco Bay Delta, USA

Nagarkar¹,

Raulund‐Rasmussen²

2016

E&S

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ABSTRACT. Adaptive management has been defined and redefined in the context of natural resource management, yet there are few examples of its successful application in ecological restoration. Although the 2009 Delta Reform Act now legally requires adaptive management for all restoration efforts in the Sacramento-San Joaquin Delta, in California, USA, projects in this region still encounter problems with implementation. We used a comparative case study analysis to examine adaptive management planning and implementation both in and around the Delta, assessing not only why adaptive management is not yet well implemented, but also what changes can be made to facilitate the adaptive management approach without sacrificing scientific rigor. Adaptive management seems to be directly and indirectly affected by a variety of challenges and convoluted by ambiguity in both planning documents and practitioner's interpretations of the concept. Addressing these challenges and ambiguities at the project level may facilitate the adaptive management process and help make it more accessible to practitioners.

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“…As a consequence, many plant species (seagrasses and other submersed vascular plants) have declined. In San Francisco Bay, large-scale tidal wetland restoration projects have been implemented to counteract an approximately 80% reduction in tidal wetland area over the last 150 years (Marcus 2000;Brown 2003;Callaway et al 2011). In the U.K., wetlands are being restored in areas that formerly existed as drained and farmed arable land to prevent biodiversity loss and increase the provision of ecosystem services (Kelvin et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Green port structures and their ecosystem services in highly urbanized Japanese bays

Okada

Mito²,

Akiyama

et al. 2021

Coastal Engineering Journal

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Green port structures (i.e. green infrastructure in ports and harbors) featuring habitats for marine organisms have been promoted in Japan as part of a comprehensive policy to reduce the environmental impact of ports and carry out habitat conservation, restoration, and creation. In this study, we evaluated the ecosystem services provided by green port structures in two highly urbanized bays (Tokyo Bay and Osaka Bay) in Japan. Our results show that the provision of some ecosystem services can be limited by circumstances particular to ports and other areas with restricted access. In the case of green port structures that have strong usage restrictions, for example, cultural services can only be provided if relevant authorities are prepared to conduct public events while ensuring participant safety. On the other hand, green port structures with weak usage restrictions are often equipped with incidental facilities such as parking lots and restrooms; these facilities can enhance the provision of cultural services (e.g. recreation and environmental education). Green port structures in highly urbanized bays often have usage restrictions, but their proximity to large populations means that they can potentially provide numerous ecosystem services. However, our study shows that appropriate management goals, such as protecting species and ensuring healthy habitats, are needed to maintain the value of these services in highly urbanized and eutrophic bays.

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Tidal Wetland Restoration in San Francisco Bay: History and Current Issues

Cited by 23 publications

References 50 publications

Suspended sediment dynamics in a tidal channel network under peak river flow

Suspended sediment dynamics in a tidal channel network under peak river flow

An appraisal of adaptive management planning and implementation in ecological restoration: case studies from the San Francisco Bay Delta, USA

Green port structures and their ecosystem services in highly urbanized Japanese bays

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