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Articles 1 - 7 of 7
Full-Text Articles in Environmental Sciences
First-Order Catchment Mass Balance During The Wet Season In The Panama Canal Watershed, Fred Ogden
First-Order Catchment Mass Balance During The Wet Season In The Panama Canal Watershed, Fred Ogden
Fred L. Ogden
Tropical hydrology is poorly understood for a number of reasons. Intense biological activity in the tropics introduces complexities to the hydrologic process. Bioturbation, rapid rates of decay, and intensive insect activity all tend to promote rapid flow paths in the upper soil. Aggressive weathering leads to clays depleted of light cations and deep soil profiles. Processes in the seasonal tropics are further complicated by seasonal transitions, and very large changes in catchment storage between seasons. Beginning in 2005, we installed a suite of hydrologic sensors in a 16.7 ha first-order catchment in the Panama Canal Watershed to observe hydrologic variables …
Effects Of Nutrient Availability And Other Elevational Changes On Bromeliad Populations And Their Invertebrate Communities In A Humid Tropical Forest In Puerto Rico, Barbara A. Richardson, M. J. Richardson, Frederick Scatena, William H. Mcdowell
Effects Of Nutrient Availability And Other Elevational Changes On Bromeliad Populations And Their Invertebrate Communities In A Humid Tropical Forest In Puerto Rico, Barbara A. Richardson, M. J. Richardson, Frederick Scatena, William H. Mcdowell
Frederick Scatena
Nutrient inputs into tank bromeliads were studied in relation to growth and productivity, and the abundance, diversity and biomass of their animal inhabitants, in three forest types along an elevational gradient. Concentrations of phosphorus, potassium and calcium in canopy-derived debris, and nitrogen and phosphorus in phytotelm water, declined with increasing elevation. Dwarf forest bromeliads contained the smallest amounts of debris/plant and lowest concentrations of nutrients in plant tissue. Their leaf turnover rate and productivity were highest and, because of high plant density, they comprised 12.8and contained 3.3 t ha -1 of water. Annual nutrient budgets indicated that these microcosms were …
Bioretention: Evaluating Their Effectiveness For Improving Water Quality In New England Urban Environments, Mary Dehais
Bioretention: Evaluating Their Effectiveness For Improving Water Quality In New England Urban Environments, Mary Dehais
Mary Dehais
Nonpoint source (NPS) pollution is one of the leading causes of water quality problems in the United States. Bioretention has become one of the more frequently used stormwater management practices for addressing NPS pollution in urbanized watersheds in New England. Yet despite increased acceptance, bioretention is not widely practiced. This study explores and evaluates the efficacy of bioretention for protecting urban water quality. This research found that numerous monitoring methods are used by researchers and industry experts to assess the effectiveness of stormwater best management practices (BMPs) and low impact development (LID) practices that include bioretention. The two most common …
Exploring The Effects Of Aperture Size, Aperture Variability And Matrix Properties On Biocolloid Retention In A Single, Saturated Fracture, Margaret Burke
Exploring The Effects Of Aperture Size, Aperture Variability And Matrix Properties On Biocolloid Retention In A Single, Saturated Fracture, Margaret Burke
Sarah E Dickson
No abstract provided.
Landscape Management For Sustainable Supplies Of Bioenergy Feedstock And Enhanced Soil Quality, Douglas L. Karlen, David J. Muth Jr.
Landscape Management For Sustainable Supplies Of Bioenergy Feedstock And Enhanced Soil Quality, Douglas L. Karlen, David J. Muth Jr.
Douglas L Karlen
Agriculture can simultaneously address global food, feed, fi ber, and energy challenges provided our soil, water, and air resources are not compromised in doing so. As we embark on the 19th Triennial Conference of the International Soil and Tillage Research Organization (ISTRO), I am pleased to proclaim that our members are well poised to lead these endeavors because of our comprehensive understanding of soil, water, agricultural and bio-systems engineering processes. The concept of landscape management, as an approach for integrating multiple bioenergy feedstock sources, including biomass residuals, into current crop production systems, is used as the focal point to show …
Evaluating Subdivisions For Identifying Extraneous Flow In Separate Sanitary Sewer Systems, Adam Lanning, Eric Wade Peterson
Evaluating Subdivisions For Identifying Extraneous Flow In Separate Sanitary Sewer Systems, Adam Lanning, Eric Wade Peterson
Eric Wade Peterson
No abstract provided.
Evaluation Of Fresh-Water Resources At The Line Hole Wellfield Using Electrical Resistivity Tomography, Scot A. Russell, Lee J. Florea, Chasity L. Stinson
Evaluation Of Fresh-Water Resources At The Line Hole Wellfield Using Electrical Resistivity Tomography, Scot A. Russell, Lee J. Florea, Chasity L. Stinson
Lee J Florea, PhD, P.G.
A major economic constraint in the Bahamas, and other small carbonates islands world-wide, is the lack of fresh water resources. To better address socio-economic problems on San Salvador Island, the Bahamas, I sought to gain a more detailed understanding of the extent, behavior, and controls on the island’s fresh-water lens using DC electrical resistivity tomography and time-series geochemical data from the Line Hole well field, an inactive source water supply last used in December of 2006. Electrical resistivity profiles were used to image the extent and geologic framework of the fresh water lens in this coastal setting. Time-series geochemical data …