WSP06982

• File Number: 8220.101.10
• Description: Colorado River-Water Projects-Glen Canyon Dam/Lake Powel-Glen Canyon Adaptive Management
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/2003
• Author: Melis-Topping
• Title: Testing Laser-Based Sensors for Continuous In Situ Monitoring of Suspended Sediment in the Colorado River Arizona
• Water Supply Pro - Doc Type: Report/Study

01953 '

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Th..odtJre S Meh~ <'I al.

Suspended.sediment grain size is an important component of the Grand Canyon
monitoring protocol (see section below). For the July 2001 test, the L1SST-lOOB
provided median grain size data for sand that closely matched sand sizes obtained
using the 0-77 sampler (Fig. 4(3)). Grain-size data for sand from the January 2002. test
also compared well with the 0-17 data (Fig. 4(b)). A 5.week deployment of the

(a)

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Jo'ig. .3 (a) Comparison of sand concenfrations and (b) silt & clay concenlralions
measured all~ Grand Canyon gage using L1SST.l00B (wilh 80"10 PRM) and the 0-
77 bag ~mpler during Ihe multi-day January 2002 lest. Discharge dala are from the
Grand Canyon gauge.

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FiJ:.. ~ Comp<lrison or median grain sIZe (0<01 orsanrl measun~J at lhe Grand Canyon
gage uSing USST.IOOB and the 0-77 bag sampler dunng (a)lhe one-day July 2001
test. and (b) the mulll-day January :!002 Icst DIscharge dala are from the Grand
Canyon gauge