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Humboldt, California: Tidal Marsh Bathymetry Digital Elevation Model

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Publication Date
Time Period
2012-12-31

Citation

Karen Thorne, USGS Western Ecological Research Center , Research Ecologist, and Karen Thorne, USGS Western Ecological Research Center , Research Ecologist, 20151007, humboldt_bath: .

Summary

We performed bathymetric surveys using a shallow-water echo-sounding system (Takekawa et al., 2010, Brand et al., 2012) comprised of an acoustic profiler (Navisound 210; Reson, Inc., Slangerup, Denmark), Leica RTK GPS Viva rover, and laptop computer mounted on a shallow-draft, portable flat-bottom boat (Bass Hunter, Cabelas, Sidney, NE; Figure 7). The RTK GPS obtained high resolution elevations of the water surface (reported precision 10 cm water depth. We recorded twenty depth readings and one GPS location each second along transects spaced 100 m apart perpendicular to the nearby salt marsh. We calibrated the system before use with a bar-check plate and adjusted the sound velocity for salinity and temperature differences. We suspended [...]

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Extension: humboldt_bath1.zip
humboldt_bath1.tfw 90 Bytes
humboldt_bath1.tif 384.56 KB
humboldt_bath1.tif.aux.xml 1.77 KB
humboldt_bath1.tif.ovr 42.05 KB
humboldt_bath1.tif-ColorRamp.SLD 2.03 KB

Purpose

At the state level, California has highlighted coastal ecosystems as important areas susceptible to climate change and have prioritized research to assist in adaptation planning for resource management and ecosystem services. The information emerging from our CERCC network will provide local managers and decision makers with the information they need to address endangered and threatened species management, wetland conservation, anadromous fish and migratory bird management and habitat conservation and recovery plans while making informed decisions on habitat resiliency and land acquisition planning that effectively considers the effects of climate change. Our CERCC network is a research model that can be potentially transferred to other coastal regions throughout the US. The overarching goal of our research was to use site-specific data to develop local and regionally-applicable climate change models that inform management of tidal wetlands along the Pacific Northwest coast. Our overarching questions were: (1) how do tidal marsh site characteristics vary across estuaries, and (2) does tidal marsh susceptibility to SLR vary along a latitudinal gradient and between estuaries? We addressed these questions with three specific objectives: (1) measure topographical and ecological characteristics (e.g., elevation, tidal range, vegetation composition) for tidal marsh and intertidal mudflats, (2) model SLR vulnerability of these habitats, and (3) examine spatial variability of these projected changes along the latitudinal gradient of the California coast

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  • National and Regional Climate Adaptation Science Centers
  • Southwest CASC

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