Development of the Double Cylinder Caisson Breakwater
A double cylinder caisson breakwater was recently developed to create a calm sea area in deep and high wave open sea areas. In order to confirm some subjects on design method and construction...
Quantitative Assessment of Marine Traffic Environment by Using the Maneuvering Space Concept
In a coastal zone, it frequently becomes important to assess the influence of the constructions upon the marine traffic environment. Marine traffic is a man-machine system, and so not...
A Study of Political Decision Method for Remote Island's Environmental Management?Patterns of Remote Islands and a Political Goal
Remote islands are handicapped in their incomes and living conditions, because they are surrounded by oceans, the area is rather small, and also they are far from economic and cultural...
Systems for Control of Environmental Conditions in Regional Marine Ecosystem?A Fundamental Study
This study is being executed as a part of the consolidated research carried out by Nihon University. The study is being developed basically by two main research groups; the first group...
Hydrologic Modelling of Extreme Flood on Small Mountainous Watersheds
Statistical and deterministic methods for extreme flood estimation were applied to Swiss alpine catchments to assess the application limits of each approach. Comparative results produced...
Can Statistical Methods Help to Forecast Drought?
Relationships have been developed between rainfall in eastern Australia and both southern oscillation (SO) and sea surface temperatures (SSTs), and between rainfall in Ghana, West Africa...
Manning's n From Experiments with Rainfall-Runoff on Portland Cement Concrete Surfaces
Experiments were conducted under artificial rainfall on Portland cement concrete (PCC) surfaces with variable mean texture depths (MTD) and slopes (S). Rain rates were varied up to 3 in/hr...
Dune Profiles Before and After Storm Events in Coastal Massachusetts
It is well known that short-term changes in dune profiles can have a major effect on the severity of storm damage to coastal areas. In light of this, the standardized methodology developed...
A Model for Low-Drag Landslides
Field observations and experimental records indicate that the primary mode of motion of many large landslides is that of sliding rather than flowing. Most of the shear during sliding is...
Mathematical Modeling of the Sacramento-San Joaquin Delta
The Sacramento-San Joaquin Delta consists of a complex network of interconnected channels, open bodies of water, dead-end sloughs, export pumps, reservoirs, tide gates and irrigation pumps....
Protecting the Boca Raton Outfall Before and After Hurricane Andrew
A critical factor for the success of an ocean outfall is its ability to remain intact and functional for many decades of service, despite extreme episodes of wave attack and beach erosion....
Mechanics of Riprap Movement in Tidal Flow
This analysis emphasizes the need to obtain data on the size and shape of riprap pieces as a function of movement, data which are surprisingly difficult to obtain from published studies....
Relationships Between Flow and Benthic Communities
Current flows can affect directly factors critical to the survival of benthic communities, including the availability of food and nutrients, the chemical quality of water surrounding benthic...
Flow and Scour Near an Abutment
Laboratory experiments were used in conjunction with a two-dimensional depth-averaged numerical flow model, RBFVM-2D, to investigate the relationship between flow velocity distribution...
Criticality of Density Intrusions
Previous analyses of density intrusions indicates that a steady interface cannot be maintained if the front propagates at a speed greater than that of long interfacial waves. Supercritical...
Mixing Characteristics of a Transitional Stratified Two-Layer Flow
Small scale structures in a stably stratified two-layer flow are investigated. The flow configuration has the initial velocity interface displaced with respect to the density interface....
A 2-D Numerical Model for High Velocity Channels
The hydraulic performance of a high velocity channel depends on maintaining a supercritical flow regime over specified portions of its length. Predicting the potential location of shocks...
Visualization and Analysis of Multi-Dimensional Velocity Measurements in Carquinez Strait, California
On 11 March, 12 March, 15 April, and 16 April, 1991 the United States Geological Survey (USGS), Sacramento, CA, employed a Downward Looking Acoustic Doppler Current Profiler (DL-ADCP)...
Fluid Mechanics Aspects of Ocean Outfalls
Prediction of the environmental effects of ocean outfalls requires understanding of some complex fluid mechanical phenomena. These include the dynamics of merging plumes in flowing, density-stratified...
Selective Withdrawal in a Rotating Stratified Fluid
In this paper we consider the axisymmetric flow of a rotating stratified fluid into a point sink. Linear analysis of the initial value problem of flow of a linearly stratified fluid into...
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