Effects of riparian vegetation on topographic change during a large flood event, Rio Puerco, New Mexico, USA
Tóm tắt
The spatial distribution of riparian vegetation can strongly influence the geomorphic evolution of dryland rivers during large floods. We present the results of an airborne lidar differencing study that quantifies the topographic change that occurred along a 12 km reach of the Lower Rio Puerco, New Mexico, during an extreme event in 2006. Extensive erosion of the channel banks took place immediately upstream of the study area, where tamarisk and sandbar willow had been removed. Within the densely vegetated study reach, we measure a net volumetric change of 578,050 ± ∼ 490,000 m3, with 88.3% of the total aggradation occurring along the floodplain and channel and 76.7% of the erosion focusing on the vertical valley walls. The sediment derived from the devegetated reach deposited within the first 3.6 km of the study area, with depth decaying exponentially with distance downstream. Elsewhere, floodplain sediments were primarily sourced from the erosion of valley walls. Superimposed on this pattern are the effects of vegetation and valley morphology on sediment transport. Sediment thickness is seen to be uniform among sandbar willows and highly variable within tamarisk groves. These reach‐scale patterns of sedimentation observed in the lidar differencing likely reflect complex interactions of vegetation, flow, and sediment at the scale of patches to individual plants.
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Tài liệu tham khảo
Ashmore P., 1998, Gravel Bed Rivers in the Environment, 115
Beard D., 1973, Influence of texture on porosity and permeability of unconsolidated sand, AAPG Bull., 57, 349
Bryan K. andG.Post (1927) Erosion and control of silt on the Rio Puerco New Mexico Report to the Chief Engineer Middle Rio Grande Conservancy District Albuquerque NM.
Burrough P., 1998, Principles of Geographical Information Systems
Collins K. andR.Ferrari (2000) Elephant Butte Reservoir 1999 Sedimentation Survey Sedimentation and River Hydraulics Group Tech. Rep. Technical Service Center Bureau of Reclamation Denver CO.
Elliott J., 1999, Incised River Channels, 153
Gellis A., 2001, Proceedings of the 7th Federal Interagency Sedimentation Conference, 83‐91
Griffin E., 2010, Proceedings of the 2nd Joint Federal Interagency Conference, 12
Habib A., 2008, Lidar strip adjustment using conjugate linear features in overlapping strips, Int. Arch. Photogramm., Remote Sens. Spatial Inf. Sci., 37, 385
Heath D. L.(1983) Flood and recharge relationships of the lower Rio Puerco New Mexico Master's thesis New Mexico Institute of Mining and Technology Socorro NM.
Kraus K., 2006, Proceedings of the 5th International Symposium Turkish‐German Joint Geodetic Days “Geodesy and Geoinformation in the Service of our Daily Life,”, 7
Love D., 1986, Drainage Basin Sediment Delivery, 305
Maas H., 2000, Least‐squares matching with airborne laser scanning data in a TIN structure, Int. Arch. Photogramm. Remote Sens., 33, 548
Maas H., 2002, Methods for measuring height and planimetry discrepancies in airborne laser scanner data, Photogramm. Eng. Remote Sens., 68, 933
Maling D., 1989, Measurements From Maps: Principles and Methods of Cartometry
Matsuoka A., 2008, Sediment yield from seismically‐disturbed mountainous watersheds revealed by multi‐temporal aerial lidar surveys, IAHS‐AISH Publ., 325, 208
National Center for Airborne Laser Mapping(2011) Rio Puerco River NM: Study of overbank flood dynamics Houston TX doi:10.5069/G9ZW1HVC.
New Mexico Geospatial Data Acquisition Committee(2006) 2005 New Mexico DOQQs State of New Mexico Albuquerque New Mexico http://rgis.unm.edu/. Accessed 18 October 2006.
Nordin C.(1963) A preliminary study of sediment transport parameters Rio Puerco near Bernado New Mexico U.S. Geological Survey Professional Paper462‐C pp. U.S. Geological Survey Washington D.C.
Nordin C. andW.Curtis(1962) Formation and deposition of clay balls Rio Puerco New Mexico U.S. Geological Survey Water‐Resources Investigations Report 28 37–40.
Sallenger A., 2004, Assessing storm‐induced damage and dune erosion using airborne lidar: Examples from Hurricane Isabel, Shore & Beach, 72, 3
Schoneboom T., 2010, River Flow 2010: Proceedings of the International Conference on Fluvial Hydraulics River Flow, 269
Smith J. andE.Griffin(2002) Relation between geomorphic stability and the density of large shrubs on the flood plain of the Clark Fork of the Columbia River in the Deer Lodge Valley Montana US Geological Survey Water‐Resources Investigations Report pp.02–4070.
Thorne C., 1990, Vegetation and Erosion: Processes and Environments, 125
Thornthwaite C. C.Sharpe andE.Dosch(1942) Climate and accelerated erosion in the arid and semi‐arid Southwest with special reference to the Polacca Wash drainage basin Arizona Tech. Rep. 808 U.S. Department of Agriculture Technical Bulletin.
Wheaton J.(2008) Uncertainty in morphological sediment budgeting of rivers Ph.D. thesis University of Southampton Southampton UK.