Landscape Reform – California Water Library

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Re-Oaking Silicon Valley: Building Vibrant Cities with Nature

San Francisco Estuary Institute (SFEI) | August 1st, 2017

Summary

In this report, we investigate how integrating components of oak woodlands into developed landscapes — “re-oaking” — can provide an array of valuable functions fo

In this report, we investigate how integrating components of oak woodlands into developed landscapes — “re-oaking” — can provide an array of valuable functions for both wildlife and people. Re-oaking can increase the biodiversity and ecological resilience of urban ecosystems, improve critical urban forest functions such as shade and carbon storage, and enhance the capacity of cities to adapt to a changing climate. We focus on Silicon Valley, where oak woodland replacement by agriculture and urbanization tells a story that has occurred in many other cities in California. We highlight how the history and ecology of the Silicon Valley landscape can be used as a guide to plan more ecologically resilient cities in the Bay Area, within the region and elsewhere in California. We see re-oaking as part of, and not a substitute for, the important and broader oak woodland conservation efforts taking place throughout the state.

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Resilient by Design Bay Area Challenge Briefing Book

San Francisco Estuary Institute (SFEI) | July 1st, 2017

Summary

The Resilient by Design Bay Area Challenge Briefing Book is intended as a reference guide for Design Teams as they embark on the Challenge. The aim is to provide com

The Resilient by Design Bay Area Challenge Briefing Book is intended as a reference guide for Design Teams as they embark on the Challenge. The aim is to provide compilation of useful existing resources and context pertaining to resilience in the Bay Area.

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Restoration Vision for the Laguna de Santa Rosa

San Francisco Estuary Institute (SFEI) | April 1st, 2020

Summary

The Laguna de Santa Rosa, located in the Russian River watershed in Sonoma County, CA, is an expansive freshwater wetland complex that hosts a rich diversity of plant a

The Laguna de Santa Rosa, located in the Russian River watershed in Sonoma County, CA, is an expansive freshwater wetland complex that hosts a rich diversity of plant and wildlife species, many of which are federally or state listed as threatened, endangered, or species of special concern. The Laguna is also home to a thriving agricultural community that depends on the land for its livelihood. Since the mid-19th century, development within the Laguna and its surrounding watershed have had a considerable impact on the landscape, affecting both wildlife and people. Compared to predevelopment conditions, the Laguna currently experiences increased stormwater runoff and flooding, increased delivery and accumulation of fine sediment and nutrients, spread of problematic invasive species, and decreased habitat for native fish and wildlife species. Predicted changes in future precipitation patterns and summertime air temperatures, combined with expanding development pressure, could exacerbate these problems. People who manage land and regulate land management decisions in and around the Laguna, including landowners; federal, state, and local agencies; and local stakeholders, are seeking a long-term management approach for the Laguna that improves conditions for the wildlife and people that call the Laguna home. The California Department of Fish and Wildlife and Sonoma Water funded the Laguna-Mark West Creek Watershed Master Restoration Planning Project to develop such a management approach, focusing on the need to identify restoration and management actions that enhance desired ecological functions of the Laguna, while also supporting the area’s agriculture and its local residents.

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Shifting Baselines in a California Oak Savanna: Nineteenth Century Data to Inform Restoration Scenarios

Restoration Ecology, Society for Ecological Restoration (SER) | January 6th, 2011

Summary

For centuries humans have reduced and transformed Mediterranean‐climate oak woodland and savanna ecosystems, making it difficult to establish credible baselines for eco

For centuries humans have reduced and transformed Mediterranean‐climate oak woodland and savanna ecosystems, making it difficult to establish credible baselines for ecosystem structure and composition that can guide ecological restoration efforts. We combined historical data sources, with particular attention to mid‐1800s General Land Office witness tree records and maps and twentieth century air photos, to reconstruct 150 years of decline in extent and stand density of Valley oak (Quercus lobata Neé) woodlands and savannas in the Santa Clara Valley of central coastal California. Nineteenth century Valley oak woodlands here were far more extensive and densely stocked than early twentieth century air photos would suggest, although reconstructed basal areas (7.5 m2/ha) and densities (48.9 trees/ha) were not outside the modern range reported for this ecosystem type. Tree densities and size distribution varied across the landscape in relation to soil and topography, and trees in open savannas were systematically larger than those in denser woodlands. For the largest woodland stand, we estimated a 99% decline in population from the mid‐1800s to the 1930s. Although most of the study area is now intensely developed, Valley oaks could be reintroduced in urban and residential areas as well as in surrounding rangelands at densities comparable to the native oak woodlands and savannas, thereby restoring aspects of ecologically and culturally significant ecosystems, including wildlife habitat and genetic connectivity within the landscape.

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Shifting landscapes: decoupled urban irrigation and greenness patterns during severe drought

Environmental Research Letters (IOP) | June 7th, 2019

Summary

Urban outdoor water conservation and efficiency offer high potential for demand-side management, but irrigation, greenness, and climate interlinks must be better underst

Urban outdoor water conservation and efficiency offer high potential for demand-side management, but irrigation, greenness, and climate interlinks must be better understood to design optimal policies. To identify paired transitions during drought, we matched parcel-level water use data from smart, dedicated irrigation meters with high-spatial resolution, multispectral aerial imagery. We examined changes across 72 non-residential parcels using potable or recycled water for large landscape irrigation over four biennial summers (2010, 2012, 2014, and 2016) that encompassed a historic drought in California. We found that despite little change in irrigation levels during the first few years of the drought, parcel greenness deteriorated. Between summers 2010 and 2014, average parcel greenness decreased−61% for potable water irrigators and−56% for recycled water irrigators, providing evidence that vegetation could not reach its vigor from wetter, cooler years as the drought intensified with abnormally high temperatures. Between summers 2014–2016 as drought severity lessened, irrigation rates decreased significantly in line with high drought saliency, but greenness rebounded ubiquitously, on average+110% for potable water irrigators and+62% for recycled water irrigators, demonstrating climate-driven vegetation recovery as evaporation and plant evapotranspiration rates decreased. Transitions were similar for customers with both potable and recycled water; vegetation changes were dominated by the overarching climatic regime. As irrigation cannot always overcome drought conditions, which will become more severe under climate change, to maintain vegetation health, utilities and urban planners should consider the tradeoffs between providing green spaces and water scarcity. This includes evaluating the roles of climate-appropriate landscaping and adaptive reallocation of potable and recycled water resources to enhance water security. By addressing emerging themes in urban water management through analysis of data from forthcoming water metering and aerial imagery technologies, this research provides a unique perspective on water use, greenness, and drought linkages.

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Stacked Incentives: Co-Funding Water Customer Incentive Programs

Pacific Institute | June 1st, 2021

Summary

Water utilities throughout the United States offer customer incentives to motivate action and foster engagement. Incentive programs can take many forms, such as rebate

Water utilities throughout the United States offer customer incentives to motivate action and foster engagement. Incentive programs can take many forms, such as rebates for high-efficiency fixtures and appliances, technical assistance for installing cisterns and rain gardens, and educational programs about water reuse. In addition to providing water-related benefits, many of these programs generate additional co-benefits, including reductions in energy use for heating or treating water and wastewater, increased carbon sequestration in landscapes, enhancements to local biodiversity, and more. These co-benefits present water utilities with an opportunity to build collaborative partnerships and co-funding for customer incentive programs through “stacked incentives.”

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Sustainable Landscapes in California: A Guidebook for Commercial and Industrial Site Managers

Pacific Institute | August 20th, 2020

Summary

Sustainable landscaping offers a solution in balance with the local climate and ecology, and actively contributes to community and watershed health by providing economic,

Sustainable landscaping offers a solution in balance with the local climate and ecology, and actively contributes to community and watershed health by providing economic, social, and environmental benefits. This guidebook provides simple steps to consider, select, and install sustainable landscaping. Aimed specifically at businesses and communities in California, the guidebook includes information on turf replacement, installation of bioswales and rain gardens, permeable pavement, green roofs, and rain tanks and cisterns. Self-assessments guide the user through the selection and installation process.

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Sustainable Landscapes on Commercial and Industrial Properties in the Santa Ana River Watershed

Pacific Institute | February 14th, 2019

Summary

Pressures on water resources are intensifying due to aging infrastructure, population growth, climate change, and other factors. Marked by vast expanses of thirs

Pressures on water resources are intensifying due to aging infrastructure, population growth, climate change, and other factors. Marked by vast expanses of thirsty lawns and impermeable pavement, California’s urban and suburban communities are ill-equipped to handle these pressures. Outdoor use represents about half of all water used in urbanized areas, and even more in the hottest, driest parts of the state.1,2 Runoff from lawns carries fertilizers and pesticides into waterways. Similarly, impermeable pavement impedes groundwater recharge; contributes to higher peak flows; warms the urban environment; and carries oils, metals, and other toxins into rivers, estuaries, and the ocean. The good news is that there are more sustainable options for California communities. Replacing lawns with climate-appropriate plants that are irrigated efficiently can save water and reduce vulnerability to drought. When integrated with bioswales, rain gardens, and other green infrastructure, these projects can boost local water supplies, reduce flooding, and improve water quality. These practices can also save energy, provide habitat, sequester carbon, improve air quality, boost property values, enhance community livability, and increase resilience to climate change.

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Sycamore Alluvial Woodland Planting Guide

San Francisco Estuary Institute (SFEI) | August 1st, 2018

Summary

This memo builds on recent field-based studies which examined the relative distribution, health, and regeneration patterns of two major stands of sycamore alluvial woodla

This memo builds on recent field-based studies which examined the relative distribution, health, and regeneration patterns of two major stands of sycamore alluvial woodland (SAW) in Santa Clara County. Given that the acquisition, restoration, and improved management of SAW is mandated as part of the Santa Clara Valley Habitat Plan (VHP), it is increasingly critical to understand how, when, and where sycamores establish, which is critical for successful restoration design and planting success. This memo is meant to summarize recent studies on habitat requirements of the SAW habitat type, and present a planting plan and monitoring framework for restoring SAW habitat at two sites in Santa Clara County. As the science and restoration of SAW is an ongoing topic of interest, we also suggest possible subsequent studies needed to further sycamore restoration goals.

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Sycamore Alluvial Woodland: Habitat Mapping and Regeneration Study

San Francisco Estuary Institute (SFEI) | February 1st, 2017

Summary

This study investigates the relative distribution, health, and regeneration patterns of two major stands of sycamore alluvial woodland (SAW), representing managed and nat

This study investigates the relative distribution, health, and regeneration patterns of two major stands of sycamore alluvial woodland (SAW), representing managed and natural settings. Using an array of ecological and geomorphic field analyses, we discuss site characteristics favorable to SAW health and regeneration, make recommendations for restoration and management, and identify next steps. Findings from this study will contribute to the acquisition, restoration, and improved management of SAW as part of the Santa Clara Valley Habitat Plan (VHP).

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disadvantaged communities (DACs) (1)
drought (5)
economic analysis (4)
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groundwater recharge (8)
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