Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5321
Regional flood-frequency relations for streams with many years of no flow
In the southwestern United States, flood-frequency relations for streams that drain small arid basins are difficult to estimate, largely because of the extreme temporal and spatial variability of floods and the many years of no flow. A method is proposed that is based on the station-year method. The new method produces regional flood-frequency relations using all available annual peak-discharge da
Authors
Hjalmar W. Hjalmarson, Blakemore E. Thomas
Relative efficiency of four parameter-estimation methods in steady-state and transient ground-water flow models
Parameters in numerical ground-water flow models have been successfully estimated using nonlinear-optimization methods such as the modified Gauss-Newton (GN) method and conjugate-direction methods. This paper investigates the relative efficiency of GN and three conjugate-direction parameter-estimation methods on two-dimensional, steady-state and transient ground-water flow test cases. The steady-s
Authors
M. C. Hill
Rheological analysis of fine-grained natural debris-flow material
Experiments were conducted on large samples of fine-grained material (???2mm) from a natural debris flow using a wide-gap concentric-cylinder viscometer. The rheological behavior of this material is compatible with a Bingham model at shear rates in excess of 5 sec. At lesser shear rates, rheological behavior of the material deviates from the Bingham model, and when sand concentration of the slurry
Authors
Jon J. Major, Thomas C. Pierson
Rheological properties of simulated debris flows in the laboratory environment
Steady debris flows with or without a snout are simulated in a 'conveyor-belt' flume using dry glass spheres of a uniform size, 5 or 14 mm in diameter, and their rheological properties described quantitatively in constants in a generalized viscoplastic fluid (GVF) model. Close agreement of the measured velocity profiles with the theoretical ones obtained from the GVF model strongly supports the va
Authors
Chi-Hai Ling, Cheng-lung Chen, Chyan-Deng Jan
Simulated effects of climatic change on runoff and drought in the Delaware River Basin
Various projection of climatic change were applied to watershed models of the Delaware River basin. Simulations indicate that a warming could reduce annual runoff by as much as 25 percent if current precipitation patterns continue. Simulations indicate that the largest changes in basin drought are in response to relatively small changes in precipitation. Basin drought was less sensitive to increas
Authors
Mark A. Ayers, Gary D. Tasker, David M. Wolock, Gregory J. McCabe, Lauren E. Hay
Site 778
No abstract available
Authors
P.B. Fryer, J.A. Pearce, L.B. Stokking, J.R. Ali, R.J. Arculus, D.L. Ballotti, M.M. Burke, Giuliano Ciampo, J.A. Haggerty, R.B. Haston, Dietrich Heling, M.A. Hobart, Teruaki Ishii, L.E. Johnson, Yves Lagabrielle, F.W. McCoy, Hirokazu Maekawa, M. S. Marlow, G.J. Milner, M.J. Mottl, B.J. Murton, S.P. Phipps, C.A. Rigsby, K.L. Saboda, Bjorg Stabell, S.R. Van der Laan, Yulin Xu
Site 780
No abstract available
Authors
P.B. Fryer, J.A. Pearce, L.B. Stokking, J.R. Ali, R.J. Arculus, D.L. Ballotti, M.M. Burke, Giuliano Ciampo, J.A. Haggerty, R.B. Haston, Dietrich Heling, M.A. Hobart, Teruaki Ishii, L.E. Johnson, Yves Lagabrielle, F.W. McCoy, Hirokazu Maekawa, M. S. Marlow, G.J. Milner, M.J. Mottl, B.J. Murton, S.P. Phipps, C.A. Rigsby, K.L. Saboda, Bjorg Stabell, S.R. Van der Laan, Yulin Xu
Site 781
No abstract available
Authors
P.B. Fryer, J.A. Pearce, L.B. Stokking, J.R. Ali, R.J. Arculus, D.L. Ballotti, M.M. Burke, Giuliano Ciampo, J.A. Haggerty, R.B. Haston, Dietrich Heling, M.A. Hobart, Teruaki Ishii, L.E. Johnson, Yves Lagabrielle, F.W. McCoy, Hirokazu Maekawa, M. S. Marlow, G.J. Milner, M.J. Mottl, B.J. Murton, S.P. Phipps, C.A. Rigsby, Bjorg Stabell, S.R. Van der Laan, Yulin Xu
Site 782
No abstract available
Authors
P.B. Fryer, J.A. Pearce, L.B. Stokking, J.R. Ali, R.J. Arculus, D.L. Ballotti, M.M. Burke, Giuliano Ciampo, J.A. Haggerty, R.B. Haston, Dietrich Heling, M.A. Hobart, Teruaki Ishii, L.E. Johnson, Yves Lagabrielle, F.W. McCoy, Hirokazu Maekawa, M. S. Marlow, G.J. Milner, M.J. Mottl, B.J. Murton, S.P. Phipps, C.A. Rigsby, K.L. Saboda, Bjorg Stabell, S.R. Van der Laan, Yulin Xu
Site 783
No abstract available
Authors
P.B. Fryer, J.A. Pearce, L.B. Stokking, J.R. Ali, R.J. Arculus, D.L. Ballotti, M.M. Burke, Giuliano Ciampo, J.A. Haggerty, R.B. Haston, Dietrich Heling, M.A. Hobart, Teruaki Ishii, L.E. Johnson, Yves Lagabrielle, F.W. McCoy, Hirokazu Maekawa, M. S. Marlow, G.J. Milner, M.J. Mottl, B.J. Murton, S.P. Phipps, C.A. Rigsby, K.L. Saboda, Bjorg Stabell, S.R. Van der Laan, Yulin Xu
Site 784
No abstract available
Authors
P.B. Fryer, J.A. Pearce, L.B. Stokking, J.R. Ali, R.J. Arculus, D.L. Ballotti, M.M. Burke, Giuliano Ciampo, J.A. Haggerty, R.B. Haston, Dietrich Heling, M.A. Hobart, Teruaki Ishii, L.E. Johnson, Yves Lagabrielle, F.W. McCoy, Hirokazu Maekawa, M. S. Marlow, G.J. Milner, M.J. Mottl, B.J. Murton, S.P. Phipps, C.A. Rigsby, K.L. Saboda, Bjorg Stabell, S.R. Van der Laan, Yulin Xu
Site 786
No abstract available
Authors
P.B. Fryer, J.A. Pearce, L.B. Stokking, J.R. Ali, R.J. Arculus, D.L. Ballotti, M.M. Burke, Giuliano Ciampo, J.A. Haggerty, R.B. Haston, Dietrich Heling, M.A. Hobart, Teruaki Ishii, L.E. Johnson, Yves Lagabrielle, F.W. McCoy, Hirokazu Maekawa, M. S. Marlow, G.J. Milner, M.J. Mottl, B.J. Murton, S.P. Phipps, C.A. Rigsby, K.L. Saboda, Bjorg Stabell, S.R. Van der Laan, Yulin Xu