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(October 30, 1961). Pantano Wash, a tributary of Rillito Creek southeast
of Tucson, is perennial in this reach owing to a bedrock constriction
with a concrete dam built within it. The stream is unregulated upstream
from the gaging station; the concrete sill forms a weir that provides
a low-water control for the gaging station. The flood of record, estimated
to be 38,000 ft³/s, occurred in 1958. The channel margins support
mesquite (Garrett Anderson, #4658). |
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| (November 28, 2000). In the 39 years between the photographs,
the largest flood was 13,000 ft³/s in 1981. Cottonwood
trees are now established near the low-water channel, and mesquites
have grown up on the banks. The density of saguaros has also
increased, particularly at right center (Dominic Oldershaw,
Stake 2219). |
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Next: Gila River at Calva (09466500)
Previous: San Carlos River Near
Peridot (09468500)
Introduction
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