Difference between revisions of "Aeolian Sand Transport"
From Glen Canyon Dam AMP
Cellsworth (Talk | contribs) |
Cellsworth (Talk | contribs) |
||
Line 45: | Line 45: | ||
[[File:AeolianClassification.jpg|center|600px]] [https://www.usbr.gov/uc/rm/amp/twg/mtgs/15jan20/Attach_03.pdf] | [[File:AeolianClassification.jpg|center|600px]] [https://www.usbr.gov/uc/rm/amp/twg/mtgs/15jan20/Attach_03.pdf] | ||
− | [[File:AeolianSand.jpg|center|600px]] | + | [[File:AeolianSand.jpg|center|600px]] [https://pubs.er.usgs.gov/publication/pp1825] |
− | *Of 358 river-corridor arch sites (RM 0-240), 76 (21%) are adjacent and upwind of sandbars receiving HFE sand (Type 1 and Type 2a) that don't have some sort of topographic barrier between the sandbar and the arch site. Of these, 44 sites (12%) are currently blocked by vegetation from receiving aeolian sand. | + | *Of 358 river-corridor arch sites (RM 0-240), 76 (21%) are adjacent and upwind of sandbars receiving HFE sand (Type 1 and Type 2a) that don't have some sort of topographic barrier between the sandbar and the arch site. Of these, 44 sites (12%) are currently blocked by vegetation from receiving aeolian sand. [https://pubs.er.usgs.gov/publication/pp1825] |
|} | |} |
Revision as of 09:34, 4 August 2017
|
Aeolian Sand TransportSand can potentially help preserve archaeological features by direct burial and/or by mitigating gullying and other erosion. Sand can be deposited on archaeological features or within gullies via fluvial (river) or aeolian (wind) deposition. Most archaeological sites are above the highest contemporary river stage, so aeolian deposition is the most likely mechanism for preservation and/or erosion mitigation. River-sourced sand deposition is a time-dependent process, and the outer limit of that process may extend for many years after any individual HFE. Additionally, HFEs with targeted vegetation removal could produce a net sediment surplus at some sites. [1] |
--- |
--- |
--- |
---|
|
|