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Changes in the Channel of North Pueblo Canyon
Summer 2003
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February
2003 |
September
2003 |
In April 2003, students from Mr. Ross', Mrs Benjamin's, and Mrs. Ryder's classes at Pinon Elementary in White Rock measured the shape of the stream channel in North Pueblo Canyon. Using a simple method not much different than that pioneered by hydrologist Luna Leopold, the sixth graders generated stream cross sections.
Three intense storms hit the Pueblo Watershed during the summer of 2003. On August 11, 0.8 inches fell in less than 30 minutes; August 23, 1.37 inches, most in a 15-minute interval; and on September 6, 0.96 inches in 30 minutes. Each storm flooded the canyon bottom and carried a slurry of water, rocks, logs, and gravel.
The results can be seen from the graphs below. Fall data was collected by USFS hydrologist Greg Kuyumjian and VTF board member Craig Martin.
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| On the left (south) side of the cross section, the stream bed is now 15 inches higher than in April. The old channel was 67 feet wide and has increased to about 80 feet. Note also the downcutting of the right (north) side of the channel. |
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| At this cross section the channel increased from about 50 feet wide about 70 feet in width. Again note that the stream bed is more than two feet higher on the south side of the channel. |
More information on the recovery of the Pueblo Watershed
