HR: 0830h
AN: H51D-1099    [PDF]
TI: Links between erosion, runoff variability, and seismicity in the Taiwan orogen
AU: * Hovius, N
EM: nhovius@esc.cam.ac.uk
AF: Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ United Kingdom
AU: Dadson, S J
EM: sdadson@esc.cam.ac.uk
AF: Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ United Kingdom
AU: Chen, H
EM: hchen@ntu.edu.tw
AF: Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, ROC Taiwan
AU: Dade, W B
EM: william.b.dade@dartmouth.edu
AF: Department of Earth Sciences, Dartmouth College, Hanover, NH 03755 United States
AU: Hsieh, M
EM: hsiehml@pchome.com.tw
AF: Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, ROC Taiwan
AU: Willett, S D
EM: swillett@u.washington.edu
AF: Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195 United States
AU: Hu, J
EM: jchu@ccms.ntu.edu.tw
AF: Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, ROC Taiwan
AU: Horng, M
EM: mjhorng@wra.gov.tw
AF: Water Resources Agency, Ministry of Economic Affairs, Hsin-Yi Road, Taipei, ROC Taiwan
AU: Chen, M
EM: cmorgan@taroko.gov.tw
AF: Taroko National Park Headquarters, Fu-Su Village, Hualien, ROC Taiwan
AU: Stark, C P
EM: cstark@ldeo.columbia.edu
AF: Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, NY 10964 United States
AU: Lague, D
EM: dlag02@esc.cam.ac.uk
AF: Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ United Kingdom
AU: Lin, J
EM: jclin@ccms.ntu.edu.tw
AF: Department of Geography, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, ROC Taiwan
AB: Erosion of mountain belts controls their topographic and structural evolution and is the main source of sediment delivered to the oceans. While mountain erosion rates have been estimated from relief and precipitation, full evaluation of controls on erosion rates and patterns is challenging and requires detailed measurements across multiple time-scales. We report erosion rates in the Taiwan mountains estimated from modern river sediment loads, Holocene river incision, and million-year time-scale thermochronometry. Estimated erosion rates are high, 3--6 mm yr$^{-1}$, on all time-scales, but the pattern of erosion has changed over time in response to localized tectonic deformation. Modern erosion corresponds with historical seismicity and runoff variability, while the topographic expression of tectonic and erosional forcing is modulated by substrate erodibility.
UR: http://www.esc.cam.ac.uk/~simon00/
DE: 1824 Geomorphology (1625)
SC: Hydrology [H]
MN: 2003 Fall Meeting