This project investigated the historical ecological patterns and hydrological dynamics of most of lowland Ventura County. Synthesizing over two centuries of local documents, the project report and accompanying GIS layers provide a detailed, comprehensive, well-documented illustration of landscape conditions in the county prior to substantial Euro-American modification.
The geographic scope of the study includes the lower Santa Clara River valley (downstream of Interstate 5), the lower Ventura River valley (downstream of Matilija Dam and excluding the Ojai Valley), the Oxnard Plain (including Calleguas Creek), and the Ventura County shoreline (from the mouth of the Ventura River to Mugu Lagoon). The study focuses on the documentation of the character and distribution of riverine and wetland habitats in the County.
This study was designed to significantly improve our understanding of the underlying physical processes that have shaped - and in many cases, continue to shape - the local landscape. In doing so, it provides scientists, managers, and residents in Ventura County with information designed to support and inspire ongoing management and restoration activities in the region.
Of related interest is a study entitled Historical Mapping of Southern California Coastal Wetlands, which uses high-resolution, color scans of 25 U.S. Coast (and Geodetic) Survey Topographic Maps (“t-sheets”) to conduct preliminary analysis and interpretation of historical wetlands along the Southern California coast.
Eric Stein Southern California Coastal Water Research Project (SCCWRP)
Shawna Dark California State University, Northridge (CSUN)
Bruce Orr and Pete Downs Stillwater Sciences
Travis Longcore University of Southern California (USC)
Gretchen Coffman San Francisco State University (SFSU)
John Cloud National Oceanic and Atmospheric Administration (NOAA)
Tom Dudley University of California, Santa Barbara (UCSB)
Completed August 2011
GIS data and metadata are available for download
Download the Report
high resolution PDF (for printing)
Historical Ecology of the lower Santa Clara River, Ventura River, and Oxnard Plain (202 MB)
low resolution PDF (for screen viewing)
Historical Ecology of the lower Santa Clara River, Ventura River, and Oxnard Plain (low resolution) (17 MB)
Copies of the report (8.5"x11") can be obtained for $60, plus postage/tax
contact: [email protected] or 510-746-7355
For More Information Contact
Related Projects, News, and Events:
This project is the first regional assessment of the relative distribution and abundance of different wetland habitat types along the historical Southern California coastline ("South Coast"). The extent of South Coast wetlands has been dramatically reduced over the past 150 years, and there are now many large-scale efforts to recover some of these environments.