Grout Placement Operations
This chapter discusses grout placement operations. The procedures for drilling, proportioning and mixing, and injection used in underground grouting are basically the same as those employed...
Geochemical Modeling of Lead in Vadose Zone
In recent years, researchers have used multicomponent reactive transport models to study the mobility of potentially toxic heavy metals in the subsurface. In this study, such a mathematical...
A Screening Level Model for Estimation of Vadose Zone Leaching and Saturated Zone Mixing: VLEACHSM
A screening level computer model has been developed for the evaluation of pollutant migration through the vadose zone and subsequent mixing within the saturated zone. The model, called...
Hysteresis Effect of Karst Vadose Zone in Spring Kr5, Mt. Kr?uterin, Austria
Hysteresis effect is considerable in Spring Kr5, involving a chain of processes of recharge-infiltration-discharge. The lag time of each process to another can be briefly summarized and...
CHEMFLO Modeling of Aquifer Bioremediation in Vadose Zone
This paper deals with bioremediation in the vadose zone with an emphasis on using numerical models as a tool to ensure that the concentration of nutrients is maintained at a required level....
Flood Control vs. Flood Management
For the last 130 years, flood policy in the U.S. has been dominated by the belief that floods can be controlled by structural methods, such as levees, dikes and embankments. These efforts...
Groundwater Development and Related Issues
Optimum development and management of ground water resources requires consideration of all elements of the groundwater system and their inter-relations with total hydrologic cycle along...
Coastal Dynamics `94
During the past decade, numerical models of coastal dynamics have provided far more information than could be validated with field and laboratory measurements. Lack of data has restricted...
Medium Classic Rail Traffic: How to Forecast the New High Speed Rail Traffic
This paper describes the current situation of the transport flows by modes in the international relations between Spain and the rest of Europe. Explains the geographic zoning adopted for...
Local, State and Federal Approvals in Developing High Speed Rail Systems in the U.S.
The implementation of high speed ground transportation systems in the United States will require numerous reviews and approvals at the local, state and federal levels. It is important...
The Economics of Managing Coastal Erosion
In the race to develop prime coastal land, many structures have been built in high hazard areas which are prone to coastal erosion. In a real sense, erosion is not generally viewed to...
Oil in the Intertidal and Subtidal Sediment of the Saudi Arabian Coast One Year After the Gulf War Oil Spill
One year after the Gulf War oil spill, studies were conducted on the distribution and fate of oil in intertidal and shallow, subtidal habitats along the Saudi Arabian cost. These studies...
Wetland Creation and Restoration on the US Pacific Coast
Major wetland creation or restoration projects on the Pacific Coasts of the United States have regional characteristics and reasons for being built: (1) they are all either within deep...
Nearshore Berms: An Evaluation of Prototype Designs
The US Army Corps of Engineers continually seeks new ways to use clean dredged material. In recent years, placement of this material in shallow water to construct nearshore berms has become...
Textural Features of Sediments and TEmporal Evolution of the Littoral Between Capo Passero and Capo Scalambri (South East Sicily): An Attempt at Automatic Zoning
The southern coast of Sicily extends for about 230 km and is characterized by five physiographic units, the first of which, from Capo Passero to Capo Scalambri, is made up of a roughly...
Beach Enhancement Through Nourishment and Compartmentalization: The Recent History of Santa Monica Bay
During the past half-century, the beaches in the central and southern portions of Santa Monica Bay have been significantly enhanced by a combination of artificial nourishment and structural...
Natural Cleaning Proficiency as a Coastal Macrodescriptor
The hypothesis that coastal susceptibility to pollution increases at sublittoral sites where natural cleaning proficiency (NCP) is exceeded was tested comparing values of the pollution...
Waves and Currents Near the Kinburn Spit Extremity
A method of calculation of wave transformation and of currents generated by waves in a surf zone, including a spit extremity is offered. No additional hypothesis on radial stress and wave...
Louisiana Cheniers: Clues to Mississippi Delta History
The cheniers of southern Louisiana have map differences, deeding differences, and granulometric differences that distinguish them from swash-built beach ridges and from dune ridges. Instead,...
In Situ Bioremediation Via Horizontal Wells
The U.S. Department of Energy, Office of Technology Development, has been sponsoring full-scale environmental restoration technology demonstrations for the past 3 years. The Savannah River...
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