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Showing 1 to 20 of 373 for “"mass balance"”.
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The Mass balance modelling of Spitzbergen glaciers
This thesis deals with a series of mass balance studies carried out on two glaciers in north-west Spitsbergen, Midre Lovenbreen and Austre Broggerbreen, using an energy balance model. A general description of glaciers, including their classification and the manner in which their surfaces may be …
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An autonomous ablation stake for glacier mass balance measurements
… ígreypt kerfi sem ætlað er til mælinga á massajafnvægi jökla. Kerfið er í formi stiku sem er sett í borholu á jökulfleti. Tilgangur þess er að mæla breytinguna á yfirborðshæð jökulísins þar sem uppsafnanir eða leysingar eiga sér stað, breytingin er fengin með mælingum á hitaþversniði …
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Hydrologic Mass Balance Of Pervious Concrete Pavement With Sandy Soils
… Academy, this thesis studies the hydrologic mass balance of pervious concrete pavement in sandy soil common in Florida. In order to conduct this study, a field experiment was constructed at the UCF Stormwater Field Lab. The experiment consisted of three 4-foot tall cylindrical polyethylene …
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MASS BALANCE: Design strategies for lightweight, thermally massive construction systems
The design of lightweight, thermally massive construction systems offers the opportunity to tackle two of the main challenges currently facing the built environment: the need to reduce the use of concrete, responsible for 5-8% of global carbon emissions, and the mitigation of the impacts of extreme …
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A new approach to mass balance modeling: applications to igneous petrology
… system of equations is proposed to investigate mass balance relationships in igneous systems. A chi square (x²) minimization technique is used to solve the set of linear equations. The x² technique is superior to R² techniques because it considers the analytical errors on measurement data. …
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Mass balance modeling of polychlorinated biphenyls in the Lower Duwamish Waterway
… biphenyls (PCBs). A zero dimensional mass balance of the 5 mile long waterway, which ends in Elliott Bay, helps to determine the different sources and concentrations of PCBs within the Lower Duwamish Waterway to aid future remedial activities. There are four unknown state variables: …
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Mass balance and 3D model of PAHs in Boston's inner harbor
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Pairing Quality and Quantity in a Mass Balance of Water in California
… a water budget, in the form of a modified mass flow diagram, that depicts the quality of each quantity of water. The method involves: delineating the system boundary for the water balance: selecting the water budget time period to be used for analysis; collecting water quantity data …
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Mass Balance of Major, Minor and Trace Elements During AFBC Combustion of Fuels
… It was shown that over 95% closure of the mass balances of the 24 major, minor, and trace elements was obtained with the proposed ASTM procedure. Also, it was demonstrated that trace elements may be lost through combustion. From six combustion runs, the composition of the fly ashes produced …
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Thermal treatment of organic contaminated solids and waste : experiment, model and mass balance
… in higher removal efficiency. The result of mass balances for carbon illustrated that most of carbon recovery ranged from 45 to 115 percent in 20 experimental runs. A detailed heat and mass transfer model for thermal desorption of contaminants in/on soils has been developed for application in …
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The Use of Constrained Least-Squares to Solve the Chemical Mass Balance Problems
Made available in DSpace on 2017-07-06T18:59:18Z (GMT). No. of bitstreams: 3 Wang_Dandong_MS.pdf: 24902808 bytes, checksum: bfde76ad832ee0c92fe03f54b8d96580 (MD5) Wang_Dandong_MS_ABS.pdf: 539298 bytes, checksum: 8b1104cc59cf5e641a146591587aa33c (MD5) license.txt: 4813 bytes, checksum: …
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Atmospheric circulation and the surface mass balance in a regional climate model of Antarctica
… 500 hPa temperature, MSLP, precipitation and net mass balance trends were calculated for both periods and over 1958 - 1998. During the last two decades the strong surface cooling was observed over the Eastern Antarctica, this result is in good agreement with the result of Chapman and Walsh (2005) …
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Advancing Chemical Hazard and Risk Assessments: Insights From Chemical Property Prediction and Multimedia Mass-Balance Modeling
… of chemical properties and multimedia mass-balance modeling. First, the coverage of the applicability domains of commonly used QSARs is explored in terms of predicting chemical partitioning and reactivity properties for chemical assessments. The result shows that the applicability …
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Observer effects on pelagic fleet operations and Bayesian-based explorations of the mass balance model ECOPATH
… of constraints associated with the ECOPATH mass-balance equations to improve knowledge on estimates of parameters in the southern Benguela ecosystem. Sardine and anchovy are the most valued and carefully managed species of small pelagic fish in South Africa. The problem of dumping in this …
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Denitrification of anthropogenic nitrogen in groundwater : measurement and modeling using stable isotopic and mass balance approaches
… environments. We used stable isotope and mass balance approaches to estimate denitrification rates in groundwater at two forested field sites and in a septic system plume. These sites provided a large range of groundwater nitrate and dissolved organic carbon (DOC) concentrations. At all …
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Modelling the future mass balance of glaciated Northwest Spitsbergen, Svalbard for a range of socio-economic trajectories
… study transiently models the 2006-2100 climatic mass balance of glaciers in Northwest Spitsbergen for different socio-economic scenarios using a low-complexity, tractable approach. Glaciated Northwest Spitsbergen is projected to experience 31.3 ? 17.3% volume loss (1.11 ? 0.61 mm of sea level …
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Problem solving in chemical engineering : a study of the solution of mass balance problems by second year students
Bibliography: leaves 106-111
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Development and application of a spatially-explicit nitrogen mass-balance model for the Wood River Valley Watershed, Idaho
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.
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Determining the ability of terrestrial time-lapse microgravity surveying on a glacier to find summer mass balance using gravitational modeling
Mass loss of alpine glaciers presently account for about half of the cryospheric contribution to the global sea-level rise. Mass balance of alpine glaciers has predominantly been monitored by; (1) glaciological and hydrological methods, and (2) satellite gravimetric methods using data from NASA’s …
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Identification and Quantification of Greenhouse Gas Emissions from Oil and Natural Gas Operations Using an Aircraft-Based Mass Balance Technique
Rapid advancements in horizontal drilling and hydraulic fracturing techniques have led to a booming natural gas industry. Natural gas is considered a cleaner fuel alternative to coal, producing less carbon dioxide (CO2) upon combustion per unit energy produced, and therefore has been hailed as a …
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