Numerical Modeling of Groundwater-Lake Systems
Groundwater inflows can have important effects on the chemistry and biology of a lake ecosystem. For example, studies of lakes in Northern Wisconsin documented localization of ferromanganese...
Risk-Cost Analysis and Spillway Design
The NRC's recent report on dam safety proposes risk cost analysis to help select among alternative spillway modifications for existing dams. This paper examines the sensitivity...
Hydraulic Profile Computation Using CADD
The data preparation can also be performed by directly recording onto a computer tape the aerial survey cross section ground points and the field survey work. A computer program can then...
Fluidization of Biomas Covered Sand Particles
The expansion behavior of the fluidized bed reactor support medium is important in its design and analysis. Steady state and dynamic behavior of fluidized bed expansion were compared with...
Understanding Secondary Clarifier Behavior
The author has developed a graphic procedure for analyzing the hydraulic behavior of settling tanks. Data have been used in numerous cases to devise low cost in-tank and external improvements...
Seepage and Leakage from Dams and Impoundments
All major dams and impoundments are usually analyzed to determine the magnitude and location of seepage that can occur under, around or through the structure. More often than not, seepage...
Irrigation Canal Seepage and its Measurement
Reduction in seepage is one of the primary reasons used to justify investment in canal lining. Such justification depends greatly upon estimates of seepage through surface and subsurface...
Effect of Surge Cycle Ratio and Cycle Time on Infiltration
A recirculating furrow infiltrometer was used to simulate surge flow irrigation for various cycle times and cycle ratios. The data collected was used to evaluate two empirical surge flow...
Incorporating Crop Water Use in Drainage Design in Arid Areas
A method of drainage design for use in arid areas was developed by combining procedures proposed by D. B. McWhorter along with plant uptake functions developed by D. W. Grimes and D. W....
Channels and Groundwater: The Hydraulic Connection
Hydraulic connection between surface and groundwater implies that surface water can seep into the ground (transmission losses from open channels, for example) and eventually become or...
Sand Rights A Legal System to Protect The Shores of the Beach
The legal system of water rights in California is highly developed. So far, however, it has failed to recognize in any comprehensive fashion the importance of the sand which is transported...
Managing the Dunes and Wetlands of Norfolk, Va.
The Code of the City of Norfolk was amended in 1982 to establish a procedure for permitting and preservation of the city's saltmarshes and sand dunes. A Wetlands Board was...
Sand for Beach Nourishment in Lower Chesapeake Bay
The Virginia Institute of Marine Science designed and performed an inventory of the resources of sand in the southernmost portion of Chesapeake Bay. The primary purpose of the project...
A New Method for Effective Beach-Fill Design
Beach nourishment with sand fill has been extensively used to restore recessional beaches, but the success of this method has been variable due to a poor understanding of sediment dispersion...
Impacts of Severe Storms on Beach Vegetation
In the winter of 1982/1983 the southern California coastline was subjected to a series of storms. High tides in conjunction with high swells reshaped beach topography in many areas. One...
Some Econological Observations on Coastal Plant Communities, of New York and New Jersey
The present study was conducted at three coastal sites, Fire Island, New York, Fort Tilden, New York, and Sandy Hook, New Jersey. Four plant communities, the salt marsh community, sand...
Hazard Mitigation Efforts in the Ocean City, Maryland Area
During a low frequency storm event, there is a considerable hazard along the bay shoreline of Ocean City as a result of high water flowing back over the barrier toward the ocean. The purpose...
New Orleans Flood Gates Hydraulic Model Study
A hydraulic model study was conducted to evaluate the forces exerted on selected floodgates by flowing water as the gates are closed after flooding has begun. The results of the study...
Hydropower
Recent Developments
The Foothills Project has been under consideration by the Denver Board of Water Commissions for many years. It is one of the major steps in the continued efforts of the Board to provide...
Rock Masses
Modeling of Underground Openings/Probability of Slope Failure/Fracture of Intact Rock
While soil mechanics has been the dominant interest of Civil Engineers since Karl Terzaghi's recognition of the principle of effective stress, rock mechanics is becoming increasingly...
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