MODELING SEDIMENT PROCESSES ON SMALL WATERSHEDS: A CONCEPTUAL FRAMEWORK Ⅱ. CONCENTRATED FLOW PROCESSES

L INTRODUCTIONThe purpose of this paper is to present a general modeling framework that can serveas a conceptual basis for developing sediment process models by concentrated flow systems on small watersheds. A survey of fundamental principles for developing sedimentprocess models is made with particular emphasis on the effects of space and time averaging on the governing equations. Starting from the most general one--dimensional,unsteady model of sediment processes, simpler model structur…     

EFFECT OF ANNUAL RAINFALL AND RUNOFF COMPOSITION ON SEDIMENT YIELD IN SMALL WATERSHEDS

ＥＦＦＥＣＴＯＦＡＮＮＵＡＬＲＡＩＮＦＡＬＬＡＮＤＲＵＮＯＦＦＣＯＭＰＯＳＩＴＩＯＮＯＮＳＥＤＩＭＥＮＴＹＩＥＬＤＩＮＳＭＡＬＬＷＡＴＥＲＳＨＥＤＳＳｌｏｂｏｄａｎＰＥＴＫＯＶＩＣａｎｄＪｏｖａｎＳＴＥＦＡＮＯＶＩＣ（ＰｒｏｆｅｓｓｏｒｏｆＨｙｄｒａ...     

DISCUSSION ON “3D CFD MODELLING OF WATER AND SEDIMENT FLOW IN A HYDROPOWER RESERVOIR”

Ｔｈｅａｕｔｈｏｒｓｈａｖｅｐｒｅｓｅｎｔｅｄａｒｅｍａｒｋａｂｌｅｄｅｖｅｌｏｐｍｅｎｔｉｎ３Ｄｓｉｍｕｌａｔｉｏｎｏｆｓｅｄｉｍｅｎｔｔｒａｎｓｐｏｒｔａｎｄｉｎｎｕｍｂｅｒｉｃａｌｍｏｄｅｌａｐｐｌｉｃａｔｉｏｎｓｔｏｒｅａｌｒｅｓｅｒｖｏｉｒ...     

DISCUSSION ON ＂NUMERICAL SIMULATION OF SEDIMENT RELEASE FROM RESERVOIRS＂ （No. 1, 2006） BY KHOSROWNEJAD A. AND NEISHABORI A.

Sedimentation processes in reservoirs can be studied by performing theoretical analysis, laboratory experimentation, numerical simulation, or a combination of these three methods. Available literature focused on reservoirs is abundant. For instance, the works conducted by Hotchkiss and Parker (1991), Morris and Fan (1997), and De Cesare et al.     

FFECTS OF FLOW INTENSITY, OBSTACLE ALIGNMENT AND CROSS-SECTION GEOMETRY ON SCOUR AT BRIDGE ABUTMENTS"?CARDOSO, A.H., SANTOS, J.S. and ROCA, M.

1 FLOW INTENSITY, PF Local scour processes differ between clear-water (sub-threshold) and live-bed (post-threshold) conditions of sediment transport on the channel bed ahead of the bridge abutment. As described by Melville and Coleman (2000), the stage of sediment transport can be represented by the mean velocity ratio U/Uc, termed the flow intensity. For U/Uc 1, clear-water conditions pertain, while live-bed scour occurs for U/Uc > 1. The variation of local scour depth at bridge …