Two-Dimensional Modeling of Overland Flow
Two-dimensional distributed finite element (F-E) and finite difference (F-D) models are developed to simulate storm events on arid watersheds. The F-E model uses the kinematic wave approximation,...
Two-Dimensional Modeling of Alluvial Fan Flows
A two-dimensional, flood routing model FLO-2D has been developed to route water and mudflows over unconfined surfaces. It predicts flow velocities and depths at discrete points for channel...
Application of the U.S.G.S. DHM for Floodplain Analysis
The two-dimensional Diffusion Hydrodynamic Model, DHM, is applied to the evaluation of floodplain depths resulting from an overflow of a leveed river. The environmental concerns of flood...
Phoenix Flood Hydrology for Price Expressway
Recently HDR Engineering, Inc. (HDR) completed a study of the off-site stormwater volumes and peak flow rates for the Price Expressway and Santan Freeway in suburban Phoenix. HDR is the...
Management Strategies for Baseflow Augmentation
Management strategies for baseflow augmentation fall into the following categories: (1) livestock management, (2) upland vegetation management, (3) riparian vegetation management, (4)...
Unsteady Flow of Bingham Viscoplastic Material in an Open Channel
An analytic solution for transient flow of a Bingham viscoplastic material in an open channel is presented. The solution for the response to a time-varying pressure gradient predicts shear...
Waves in a Fluid Mud Layer Flowing Down an Incline
To model the dynamics of fluid mud, lava, or debris with a high concentration of cohesive clay particles, we consider a thin sheet of Bingham plastic fluid flowing down a slope. The Bingham...
Field Observation of Roll-waves in Debris Flow
In 1979, the observatory of debris flow was set up in the Hase River of Mt. Sakurajima in Japan which is one of the most active volcanoes in the world. Obvious roll-waves on each debris...
Some Aspects of the Mechanism of Debris Flow
As the first step of the development of a general two-phase flow model for debris flows, a simple granular model, which is considered as a special case of the two-phase flow model, is...
Predicting Stream Width and Bank Retreat
The width of streams is dependent on the flood flow discharge which varies from year to year, the bank material which varies from stream to stream and reach to reach, the sediment load...
Longitudinal Surface Profiles of Granular Debris Flows
Longitudinal surface profiles of granular material flowing down an inclined plane were studied by means of theoretical analysis and laboratory experiments. There are two driving forces...
Model of Deposition of Grains from Debris Flow
Rapid deposition of grains from debris flow occurs in a channel whose slope angle decreases abruptly. A model of the deposition is presented on the basis of experiments and theoretical...
Multiple Phenomena of Debris-Flow Processes: A Challenge for Hazard Assessments
Hazardous hydraulic processes associated with arid environments commonly repesent significant risks to the safety of the public. However, the public generally considers these risks to...
Recurrence of Debris Flows on an Alluvial Fan in Central Utah
In the spring of 1983 a large debris flow occurred in the drainage of Birch Creek, near Fountain Green in central Utah. During the debris-flow activity, a new channel was incised into...
Design Cloudburst and Flash Flood Methodology for the Western Mojave Desert, California
A methodology was required for estimating flow in ungaged drainages. An analysis of floods in the western Mojave Desert showed that the largest events on basins below 1,500 meters MSL...
Structural Control of Ground-Water Induced Debris Flows
A number of case studies have attributed debris flow initiation to the effect of elevated pore pressure from a bedrock ground-water source. Debris flows on slopes underlain by Precambrian...
Initiation and Laws of Motion of Debris Flow
The mechanism of initiation and laws of motion of debris flow are studied experimentally, by allowing water or clay muds, with different clay concentrations and at different flow rates,...
Geomorphology and Sedimentology of a Valley Fan, Southern Utah
Sink Valley, located in semi-arid west-central Kane County, Utah, lies on an erosional surface of Cretaceous age Tropic Shale. The valley contains an example of a previously undocumented...
Experimental Investigation of Density-Driven Hyperconcentrated Flows
Lock-exchange type of laboratory experiments have been conducted in order to evaluate the dynamical characteristics of density-driven hyperconcentrated fluid mud. Fluid mud, confined in...
Activation and Degeneration of Turbidity Currents
Flow properties of the front of a turbidity current are investigated using the two layers model which takes into account of pick up and deposition of sediment. The amount of pick up rate...
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