|Title:||Changes in Channel Morphology Along Lower Cienega Creek, Cienega Creek Natural Preserve, 1980-1998|
|Area:||Lower Cienega Creek|
|Information reported:||Past and recent channel morphology|
Text (MS Word), GIS Coverage and Maps (ArcView), Graphs and Tables (MS Word)
|Cost:||Call for current pricing|
|On-line availability:||Changes in Channel Morphology Along Lower Cienega Creek, Cienega Creek Natural Preserve, 1980-1998 (HTML)|
|The purpose of this study was to
identify long-term changes in channel morphology along Cienega Creek within
the Cienega Creek Natural Preserve. The study methodology involved dividing
the lower Cienega Creek into five study reaches and using two types of aerial
imagery, blue-line aerial photographs and digital ortho-rectified quarter
quadrangles (DOQQs). The study focused on two channel features, the thalweg
and the active channel.
The study showed that the area of lower Cienega Creek’s active channel had appreciably decreased from 1980-1998, but the thalweg and sinuosity remained fairly constant. Possible factors that might have influenced the changes in channel morphology along the lower Cienega Creek during the time period studied include less intense and less frequent flood flows since the early 1970s, increased vegetative growth along the channel banks and the restriction of activities that have the potential for increasing streambank erosion and vegetation removal.