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Designing Sustainable Landscapes Tidal Restrictions Metric: Final Report-October 24, 2016
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The tidal restrictions metric is an element of the ecological integrity analysis of the
Designing Sustainable Landscapes (DSL) project (McGarigal et al. 2014). Consisting of
a composite of 21 stressor and resiliency metrics, the index of ecological integrity (IEI)
assesses the relative intactness and resiliency to environmental change of ecological
systems throughout the northeast. As a stressor metric, tidal restrictions uses an
estimate of the historic loss of mapped salt marshes in areas where they should occur
given elevation and tidal regime to indicate the location and magnitude of potential tidal
restrictions. The metric estimates the effect of potential tidal restrictions on upstream
wetland systems, including intertidal systems such as salt marshes, as well as freshwater
systems and low-lying nonforested uplands that may have once been intertidal. Metric
values range from 0 (no effect from downstream tidal restrictions) to 1 (severe effect).
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Designing Sustainable Landscapes: Salt Marsh Ditching Metric
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The salt marsh ditching metric is an element of the ecological integrity analysis of the
Designing Sustainable Landscapes (DSL) project (McGarigal et al. 2014). Consisting of a
composite of 21 stressor and resiliency metrics, the index of ecological integrity (IEI)
assesses the relative intactness and resiliency to environmental change of ecological
systems throughout the northeast. As a stressor metric, salt marsh ditching provides an
index of the relative intensity of ditching in salt marshes. Metric values range from 0 (no
effect from nearby ditches) to 1 (severe effect).
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District of Columbia Department of the Environment
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The District Department of the Environment (DDOE) is the leading authority on energy and environmental issues affecting the District of Columbia. Using a combination of regulations, outreach, education, and incentives, our agency administers programs and services to fulfill our mission. We work collaboratively with other government agencies, residents, businesses, and institutions to promote environmentally responsible behavior that will lead to a more sustainable urban environment.
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Northeast State Wildlife Action Plan Coordination
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Beach Resiliency project descriptions, relevant publications and reports
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Hurricane Sandy Marsh Resiliency project descriptions, relevant publications and reports
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Atlantic and Gulf Coast Resiliency Project project descriptions, relevant publications and reports
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