EDS Projects
Recent EDS projects showcase the pairing of state-of-the-art technology with a wide range of field efforts. From the wind-swept playas of the high desert, to the fog-enshrouded Redwoods of Muir Beach, EDS is applying cutting-edge data gathering technologies in a variety of environmental settings.
Following are brief summations of these projects and the technologies we are using. If you would like to learn more about the specifics of our current or past field investigations please drop us a line so we may share our insights.
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Sears Point/Tolay Creek Restoration Bathymetric Survey and Flow Monitoring
Sonoma County, California
Client: Wetlands and Water Resources
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EDS was contracted by Wetland and Water Resources (San Rafael, CA) to design and deploy a surface water flow monitoring program for the Sears Point Restoration Project in Sonoma County, California. This multi-faceted monitoring effort is designed to yield topographic, hydrologic and bathymetric data that will aid in the exploration of design alternatives for an upland, seasonal and tidal habitat restoration project.
EDS deployed 8 flow and level sensors throughout the project site and surveyed all locations and sensor elevations to the project datum. Data from these sensors will calibrate a storm water runoff model that will aid in the design of project flood control levees.
EDS field personnel also conducted a Class 1 bathymetric survey of the main tidal creek (Tolay Creek) and San Pablo Bay mudflats. EDS cartographers processed the data in ArcGIS which will facilitate the construction of a digital elevation model (DEM). Top of page.
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Integrated Regional Wetland Monitoring
San Pablo Bay, Suisun Bay, California
Client: Wetlands and Water Resources
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As part of a CalFED monitoring effort, EDS, in collaboration with Wetland and Water Resources, is managing over 30 deployed instrument platforms throughout San Pablo Bay and the west Delta. These sensor platforms are generating time series data characterizing tidal heights, conductivity, dissolved oxygen and suspended sediment concentrations in ancient and restored tidal marshes. Ten of these stations incorporate telemetry for real-time monitoring and data reduction. EDS also conducted multiple bathymetric surveys of key tidal channels within each monitoring site. Top of page.
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Marina Shores Proposed Development,
Redwood Creek Bathymetric & Topographic Survey
Redwood Creek, Redwood City, CA
Clients: BKF Engineers, Glenborough Pauls LLC
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EDS conducted a Class 1 bathymetric survey of a two mile reach of Redwood Creek (Redwood City, CA) and a portion of the Port of Redwood City. The EDS field crew utilized a specially-designed Boston Whaler outfitted with a narrow-beam system and RTK GPS. All data were reduced and contoured in AutoCAD 2004 for channel and marsh edge analysis. Top of page.
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Salton Sea Seabed Classification and Bathymetric Survey
Inyo County, California
Client: Agrarian Research Inc., and The Salton Sea Authority
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This large-scale field effort was designed to identify and describe the nature of surface and sub-surface sediments that would be exposed due to expected future declines in the level of the Sea. EDS utilized state-of-the-art acoustic technology and data processing routines to remotely sense, describe and map the sea bottom.
The seabed classification effort was calibrated and verified through the collection and cataloging of over 800 surface grab samples and 500 sub-surface core samples. This effort was coupled with a multi-beam bathymetric survey of the entire seabed which was used to create a Digital Elevation Model. This model was then layered with the seabed classification and sample data.Top of page.
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Sly Park Reservoir Bathymetric Survey and Water Quality Monitoring
Sly Park Reservoir, El Dorado County, Ca
Client: Hydrologic Systems Inc.
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As part of a joint venture with Hydraulic Systems Inc. (San Rafael, Ca), and Hydroikos Associates (San Rafael, Ca), EDS is currently managing an extensive field data collection effort at Sly Park Reservoir (Jenkinson Lake) In El Dorado County, California. As part of an overall water quality and reservoir management study for the El Dorado Irrigation District, EDS deployed 3 moored data buoys which are monitoring and recording temperature at 10 ft depth intervals for an 8 month period.
In order to document baseline conditions for future lake modeling, EDS installed and maintains a stream gauge on the main creek (Park Creek) flowing into the lake. In addition to hydrologic monitoring, EDS has conducted creek channel surveys within the watershed and a bathymetric survey of the entire reservoir. Top of page.
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South San Francisco Bay Conductivity, Temperature and Depth Monitoring
South San Francisco Bay, California
Client: Moffatt and Nichol
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EDS deployed and maintained 11 CTDs throughout the Southern quadrant of San Francisco Bay from January to May, 2004. This work was performed under contract to Moffatt and Nichol Engineers, Walnut Creek, California with funding provided by the California State Coastal Conservancy.
One of the goals of this monitoring effort is to characterize hydrologic conditions during winter – spring conditions. Collected time series will aid in the calibration of three dimensional computer models that will evaluate restoration alternatives for the South Bay Salt Pond Restoration effort currently underway (www.southbayrestoration.org). In addition to characterizing tidally-influenced water surface elevations and salinities, this monitoring program also documented the effects of rainfall events on salinities and water surface elevations at key tidally-influenced creeks along the margins of South San Francisco Bay. Top of page.
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Redwood Creek Monitoring and Topographic Surveys
Marin County, California
Client: National Park Service
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As part of a coastal stream and lagoon restoration effort, this three year monitoring program focuses on characterizing stream flow, sediment transport, and seasonally-influenced changes in creek channel geometries. The EDS field crew sampled eight storm events between November 2002 and February 2004, as well as maintained two stream monitoring packages that consisted of a stage recorder and optical backscatter sensor (OBS).
Storm sampling consisted of measuring bedload, suspended sediment concentrations, flow and creek stage. Repeated topographic surveys of a two mile reach of creek, Big Lagoon and beach-dune system, documents natural and restored (post-construction) stream channel geometries during pre and post winter conditions.Top of page.
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Charleston Slough Wetland Monitoring
Mountain View, California
Client: City of Mountain View
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EDS is providing on-going monitoring
services for the City of Mountain View that include repeated tidal
slough channel and marsh plain surveys. In addition to surveying,
EDS is maintaining instrument platforms that record data on conductivity,
dissolved oxygen and water surface elevations.
These data will be used for adaptive management decisions
as well as calibration and validation of various hydrodynamic models. Top
of page.
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Lower Snake River Dredging Project Water Quality Monitoring
Snake and Clearwater Rivers, Washington
Client: Manson Construction
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EDS teamed with Dixon Marine Services (Inverness, CA) and EYASCO, Inc. (Aptos, Ca)
to design, implement and manage a real-time water quality monitoring
program to support dredging operations at various reaches within the Snake
and Clearwater Rivers.
This monitoring program consisted of four
instrumentation platforms at the dredging sites, and two at the disposal
site. Each platform measured and recorded 5 water quality constituents (at
the top and bottom of the water column): depth, turbidity, ammonia, pH,
temperature, DO and conductivity. The circumstances of the dredging
operation proved to be a challenge. The instrument platforms had to shadow
the movements of the dredge, as well as provide near-real time data through
a satellite telemetry link to a project database.Top
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