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Now showing items 1121-1130 of 1154
Extreme rainfall, flood scaling and flood policy options in the United States
(Massachusetts Institute of Technology, 2000)
River flood and rainfall have been shown to exhibit scale invariance behavior over a range of space and time scales. Although various approaches have been taken to investigate and model the various scaling aspects of ...
Natural attenuation of organophosphates in river systems: Chattahoochee River case study
(Massachusetts Institute of Technology, 2004)
Three organophosphoric acid triesters, tributyl phosphate (TBP), tris(2-chloroethyl) phosphate (TCEP), and tris(2-butoxyethyl) phosphate (TBEP) have been detected in surface waters across the world, primarily the result ...
Modeling and mapping of MaeLa refugee camp water supply
(Massachusetts Institute of Technology, 2008)
This thesis describes the development and use of a model, using the EPANET computer code, to simulate the three-hour intermittent MaeLa refugee camp water supply. In coordination with Aide Medicale Internationale, a field ...
Efficacy of gravity-fed chlorination system for community-scale water disinfection in northern Ghana
(Massachusetts Institute of Technology, 2008)
Although chlorine is one of the lowest cost ways of providing disinfection, currently billions of people lack drinking water that has had this simple treatment. Arch Chemical's Pulsar 1 unit is an innovation in chlorine ...
Discrete element computation : algorithms and architecture
(Massachusetts Institute of Technology, 2001)
The Discrete Element Method is a numerical technique used to model physical phenomena through the dynamic interactions of a large number of distinct bodies. The strength of the method lies in its ability to accurately model ...
Conceptual design of a building with movable parts
(Massachusetts Institute of Technology, 2007)
Although we live in a Dynamic Universe filled with movement, the design methodology that has been given to Architecture is clearly static: buildings look the same all the time. As an approach to "Dynamic Architecture", the ...
Analysis of real time operations control strategies for Tren Urbano
(Massachusetts Institute of Technology, 2000)
Investigation into dense non-aqueous phase liquid (DNAPL) transport and remediation in vertical fractures
(Massachusetts Institute of Technology, 2000)
The "greening" of the concrete industry : factors contributing to sustainable concrete
(Massachusetts Institute of Technology, 2006)
The dawn of the new millennium has brought to light the environmental concerns of global warming, pollution, limited landfill space, and depleting natural resources. These concerns, compounded by the growing global population, ...
Coupled arsenic, iron, and nitrogen cycling in arsenic-contaminated Upper Mystic Lake
(Massachusetts Institute of Technology, 2001)
This dissertation addresses the mechanisms controlling arsenic (As) remobilization and cycling in the hypolimnion of As-contaminated Upper Mystic Lake (UML; Winchester, MA). We conducted field and laboratory studies, and ...