Preliminary results subject to change
Preliminary results subject to change
* Assumes 1.65 tonnes/m3 bulk densityPreliminary results subject to change
Total	  load	  ~	  	          120,000	  t/yr	                                                                           To...
USGS Provisional data;subject to change
From Czuba et al. (2011)
From Czuba et al. (2011)
Carbon River (July 2011)
White River (June 2009)
Nisqually River (November 2010)
Tahoma Creek (November 2010)Photo courtesy Dean Koepfler, staff photographer© The Tacoma News Tribune
Topography
Aerial imagery analysis (Carbon River)          1994                                       2009                           ...
Preliminary results subject to change
Active-channel width in 2009                               USGS Provisional data;                               subject to...
Active-channel width change, 1965-1994                                         USGS Provisional data;                     ...
Active-channel width change, 1994-2009                                         USGS Provisional data;                     ...
LaharCrandle (1971, p. 3):"The term lahar is an Indonesian wordthat is used...as a general designation for deposits that h...
•  Movie by Paul Kennard of the National Park Service•  Debris flows ~80% sediment by weight; consistency of cement; float...
USGS Provisional data;subject to change
Increasing floods peaks??Snoqualmie River near Carnation, Washington                                              Mastin e...
From long-term gages, no regional trend in the Pacific Northwest                                                Hirsch and...
Increase in floods peaks a predicted response to climate change                                             Mass et al. (2...
USGS Provisional data;subject to change
MountRainierrivers:
Carbon Glacier (July 2011)
USGS Provisional data;subject to change
Based on Cui’s TUGS model-- Wilcock & Crowe, 2003-- particle attrition
USGS Provisional data;subject to change
USGS Provisional data;subject to change
USGS Provisional data;subject to change
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
Aggradation and Sediment in the Nisqually River
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Aggradation and Sediment in the Nisqually River

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Presentation given by Chris Magirl, USGS

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Aggradation and Sediment in the Nisqually River

  1. 1. Preliminary results subject to change
  2. 2. Preliminary results subject to change
  3. 3. * Assumes 1.65 tonnes/m3 bulk densityPreliminary results subject to change
  4. 4. Total  load  ~     120,000  t/yr   Total  load  =     Total  load  =     1,200,000  ±  130,000  t/yr  7,800  ±  2,600  t/yr   (Assumes  reservoir  trap  efficiency  of  90%)   USGS Provisional data; subject to change
  5. 5. USGS Provisional data;subject to change
  6. 6. From Czuba et al. (2011)
  7. 7. From Czuba et al. (2011)
  8. 8. Carbon River (July 2011)
  9. 9. White River (June 2009)
  10. 10. Nisqually River (November 2010)
  11. 11. Tahoma Creek (November 2010)Photo courtesy Dean Koepfler, staff photographer© The Tacoma News Tribune
  12. 12. Topography
  13. 13. Aerial imagery analysis (Carbon River) 1994 2009 Preliminary results subject to change
  14. 14. Preliminary results subject to change
  15. 15. Active-channel width in 2009 USGS Provisional data; subject to change
  16. 16. Active-channel width change, 1965-1994 USGS Provisional data; subject to change
  17. 17. Active-channel width change, 1994-2009 USGS Provisional data; subject to change
  18. 18. LaharCrandle (1971, p. 3):"The term lahar is an Indonesian wordthat is used...as a general designation for deposits that haveresulted from rapid mass flowage of rock debris mobilized bywater and that have originated on the slopes of a volcano."Pierson and Scott (1985, p. 1512): "The Indonesian wordlahar denotes a debris flow or a mudflow that originatesfrom a volcano, whether triggered by an eruption or not."
  19. 19. •  Movie by Paul Kennard of the National Park Service•  Debris flows ~80% sediment by weight; consistency of cement; float boulders like fishing bobbers•  Dominant downstream sediment-transport mechanism Movie available on YouTube: search “Mount Rainier debris flow”
  20. 20. USGS Provisional data;subject to change
  21. 21. Increasing floods peaks??Snoqualmie River near Carnation, Washington Mastin et al. (2009)
  22. 22. From long-term gages, no regional trend in the Pacific Northwest Hirsch and Ryberg (2011)
  23. 23. Increase in floods peaks a predicted response to climate change Mass et al. (2011)
  24. 24. USGS Provisional data;subject to change
  25. 25. MountRainierrivers:
  26. 26. Carbon Glacier (July 2011)
  27. 27. USGS Provisional data;subject to change
  28. 28. Based on Cui’s TUGS model-- Wilcock & Crowe, 2003-- particle attrition
  29. 29. USGS Provisional data;subject to change
  30. 30. USGS Provisional data;subject to change
  31. 31. USGS Provisional data;subject to change

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