Uniten II Impact - Walter Scott, Jr. College of Engineeringpierre/ce_old/Projects... · 2006. 6....
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1 Pierre Y. Julien The Impact of Sedimentation Department of Civil Engineering Colorado State University Fort Collins, Colorado UNITEN-TNBR Short Course Kuala Lumpur – July 20 2006 Objectives Brief overview of Erosion Processes, Sediment Sources and Sediment Impact: 1. Upland Sediment Sources; 2. Instream Sediment Sources; 3. Sediment Problems (Examples); 4. Case Studies: Venezuela; 5. Case Studies: Haiti. 1. Upland Sediment Sources Upper Basin: high-elevation snowpack; snowmelt runoff Diverse Topography: highest mountains in Colorado – Elbert, Massive, Harvard, etc. CASC2D-SED Modeling 2004 Lesser Himalayan Area CASC2D-SED Modeling 2004
Transcript of Uniten II Impact - Walter Scott, Jr. College of Engineeringpierre/ce_old/Projects... · 2006. 6....
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Pierre Y. Julien
The Impact of Sedimentation
Department of Civil EngineeringColorado State University
Fort Collins, Colorado
UNITEN-TNBR Short CourseKuala Lumpur – July 20 2006
ObjectivesBrief overview of Erosion Processes, Sediment Sources and Sediment Impact:
1. Upland Sediment Sources; 2. Instream Sediment Sources;3. Sediment Problems (Examples);4. Case Studies: Venezuela;5. Case Studies: Haiti.
1. Upland Sediment Sources
Upper Basin: high-elevation snowpack; snowmelt runoff
Diverse Topography: highest mountains in Colorado – Elbert, Massive, Harvard, etc.
CASC2D-SED Modeling 2004
Lesser Himalayan Area
CASC2D-SED Modeling 2004
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CASC2D-SED Modeling 2004
Mangun mountain, South Korea
Crop field area of the Imha watershed, S.K.
CASC2D-SED Modeling 2004
Upland Erosion (continued)
Sheet erosion in the Upper Mississippi River basinSheet erosion in the Upper Mississippi River basinCASC2D-SED Modeling 2004
Wind erosion
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CASC2D-SED Modeling 2004
Loess plateau of the Yellow River Basin
2. Instream Sediment Sources
CASC2D-SED Modeling 2004 CASC2D-SED Modeling 2004
Bank Caving in Mississippi
Headcutting
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Channel Sediment Sources
CASC2D-SED Modeling 2004Aerial view of the 1993 Mississippi FloodAerial view of the 1993 Mississippi Flood
August 14August 14thth, 1991, 1991
August 19August 19thth, 1993, 1993
CASC2D-SED Modeling 2004Levee failure during the 1993 flood event CASC2D-SED Modeling 2004
CASC2D-SED Modeling 2004
Mekong Riverbank Erosion around Vientiane, Laos
CASC2D-SED Modeling 2004
Wat Sibounheuang Site, Mekong River
EL. SPT.
2.0x10-5--7.5-10CAYEY SANDY GRAVEL
16.329.02.045-6
7.9x10-713.928.42.083-4SANDY SILT
Permeability(cm/s)
Cohesion (kPa)
Friction Angle(deg.)
Unit Weight(kN/m3)
Depth(m)Typical layer
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3. Sediment Problems (Examples)
CASC2D-SED Modeling 2004
Impact of Sedimentation
CASC2D-SED Modeling 2004
Imha reservoir
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CASC2D-SED Modeling 2004Barrier island loss due to hurricane Katrina, Mississippi RiverBarrier island loss due to hurricane Katrina, Mississippi River
July 2005July 2005
September 2005September 2005
4. Case Studies: Sediment Impact in Venezuela
CASC2D-SED Modeling 2004
Example: Vargas Mountains, Venezuela
CASC2D-SED Modeling 2004
CASC2D-SED Modeling 2004 CASC2D-SED Modeling 2004
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CASC2D-SED Modeling 2004 CASC2D-SED Modeling 2004
CASC2D-SED Modeling 2004
Los Corales
CASC2D-SED Modeling 2004
Los Corales
5. Case Studies: Sediment Impact in Haiti
Example: Peligre Dam in Haiti
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CASC2D-SED Modeling 2004 CASC2D-SED Modeling 2004
Demographic Expansion
CASC2D-SED Modeling 2004
Lowland Slash and Burn
CASC2D-SED Modeling 2004
Subsistence Farming
CASC2D-SED Modeling 2004
Farming Uphill
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Farming Hilltops?
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Watershed Deforestation
CASC2D-SED Modeling 2004
Haiti River
Sedimentation Problems Can Be Important
Peligre Dam (sedimentation)
CASC2D-SED Modeling 2004
Hurricane Impact
CASC2D-SED Modeling 2004
Emergency Spillway Operation
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Flood Damages
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Citizens Blame their Government
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Could this be avoided?
Acknowledgments
Dr. Mark Velleux, CSU, now HydroqualDr. John England, CSU, also USB ReclamationDr. Rosalia Rojas, CSUHyeon Sik Kim, CSU, also KOWACODr. Marcel Frenette, Laval University, CanadaDr. Bounthanh Bounvilay, NUOL, LaosDr. Drew Baird, USB ReclamationDr. Jose Luis Lopez, UCV, VenezuelaDr. Claudia Leon, RTI
Erosion and River Mechanics Textbooks
THANK YOUfor your
attention!
