Title: Changes in Channel Morphology Along Lower Cienega Creek, Cienega Creek Natural Preserve, 1980-1998
Date: April 2002
Area: Lower Cienega Creek

Purpose: Research

Information reported: Past and recent channel morphology
Format:

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)
REPORT SUMMARY
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.