| Abstract: | High-resolution monitoring of sand mass balance in the Colorado River below Glen Canyon Dam, Arizona, USA, is needed for environmental management. In the Grand Canyon, frequent collection of suspended-sediment samples from cableways is logistically complicated, costly and provides limited spatial and temporal resolution. In situ laser sensors were tested in the Colorado River as an alternative method for monitoring the river‘s suspended transport. LISST data were collected at a fixed-depth, near-shore site while isokinetic measurements were simultaneously made from a nearby cableway. Diurnal variations in LISST grain size and concentration data compared well with depth-integrated, cross-section data. Tbe LISST was also successfully used to electronically trigger an ISCO 6712 pump sampler to provide continuous monitoring during periods when suspended concentrations exceeded the LISST‘s measurement range. Initial results indicate that the LISST can provide useful high-resolution suspended-sediment data within the Colorado River, when optics are maintained on a weekly basis. |
| Genre: | Article |
| ProdID: | 70025352 |
| Citation Author: | Melis, T. S.; Topping, D. J.; Rubin, D. M. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | Bogen J.Fergus T.Walling D. |
| Citation End Page: | 27 |
| Citation Issue: | 283 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | IAHS-AISH Publication |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 7 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Testing laser-based sensors for continuous in situ monitoring of suspended sediment in the Colorado River, Arizona; 2003; Article; Journal; IAHS-AISH Publication; Melis, T. S.; Topping, D. J.; Rubin, D. M. |
| Citation Start Page: | 21 |
| Citation Volume: | |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Testing laser-based sensors for continuous in situ monitoring of suspended sediment in the Colorado River, Arizona; 2003; Article; Journal; IAHS-AISH Publication; Melis, T. S.; Topping, D. J.; Rubin, D. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
| Publisher: | |
