Browsing Department of Civil and Environmental Engineering by Title
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Landsurface Hydrology Parameterization for Atmospheric General Circulation Models: Inclusion of Subgrid Scale Spatial Variability and Screening with a Simple Climate Model
(Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 198909)Parameterizations are developed for the representation of subgrid hydrologic processes in atmospheric general circulation models. Reasonable a priori probability density functions of the spatial variability of soil moisture ... 
Largescale Dispersive Transport in Aquifers: Field Experiments and Reactive Transport Theory
(Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Dept. of Civil Engineering, Massachusetts Institute of Technology, 198801)A largescale naturalgradient tracer test was conducted to examine the transport of reactive and nonreactive tracers in a sand and gravel aquifer on Cape Cod, Massachusetts. The movement and spreading of bromide, a ... 
Largescale Models of Transient Unsaturated Flow and Contaminant Transport Using Stochastic Methods
(Cambridge, MA. : Dept. of Civil Engineering, Massachusetts Institute of Technology, 198501)A new framework for modeling largescale unsaturated flow and solute transport systems in spatially variable soils is proposed. The largescale model structures are derived by averaging the local governing flow and transport ... 
Life Cycle Assessment for Residential Buildings: A Literature Review and Gap Analysis (Revised)
(20161012)What is the environmental impact of a house throughout its lifetime? This report summarizes recent research on life cycle assessment of residential buildings in order to identify gaps in understanding as well as best ... 
The Linear Channel and Its Effect on the Geomorphologic IUH
(Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology ad Water Resource Systems . Dept. of Civil Engineering, School of Engineering, Massachusetts Institute of Technology, 198206)The Instantaneous Unit Hydrograph (IUH) is derived as a function of the basin's geomorphological and physiographic characteristics. Inherent in the basin IUH is the response of the individual channels composing the basin. ... 
Linear Programming and Dynamic Programming Application to Water Distribution Network Design
(Cambridge, Mass. M.I.T. Hydrodynamics Laboratory, 196907)The water distribution network design problem is to find the optimal set of investments in pipelines that are needed to satisfy water requirements. The strategy of this study has been first to define an optimality criterion ... 
Linked Hydrodynamic and Biogeochemical Models of Water Quality in Shallow Lakes
(Cambridge, Mass. : Ralph M. Parsons Laboratory, Aquatic Science and Environmental Engineering, Dept. of Civil Engineering, School of Engineering, Massachusetts Institute of Technology, 198203)Approaches to lake water quality modeling are critically examined with particular attention to the formulation of water quality transport as the link between hydrodynamics and biogeochemical reaction. A linked water quality ... 
Management of supply chain: an alternative modelling technique for forecasting
(Journal of the Operational Research Society, 20070523)Forecasting is a necessity almost in any operation. However, the tools of forecasting are still primitive in view of the great strides made by research and the increasing abundance of data made possible by automatic ... 
Mass Transport in Water Waves Part I: Theory
(Cambridge, Mass. Dept. of Civil Engineering, Massachusetts Institute of Technology, 197204)When a fluid is in periodic wave motion, a fluid particle is carried by a velocity field varying from place to place. At different instants the location of the particle differs and so does the velocity field in its immediate ... 
A Mathematical Model for the Prediction of Unsteady Salinity Intrusion in Estuaries
(Cambridge, Mass. : Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, Department of Civil Engineering, Massachusetts Institute of Technology, 197202)The salinity structure of a tidal estuary fed by upstream fresh water sources is an important factor of water quality. In addition, this structure is intimately related to the circulation of the estuary because of density ... 
Mathematical Models of the Massachusetts Bay
(Cambridge, Mass. : Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, Dept. of Civil Engineering, School of Engineering, Massachusetts Institute of Technology, 197310)Part 1. The vertically integrated conservation of mass and momentum equations for shallow water bodies are reviewed. The equations used in this study are based on only two assumptions: hydrostatic pressure and squares of ... 
Mathematical Predictive Models for Cooling Ponds and Lakes
(Cambridge, Mass. : Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, Dept. of Civil Engineering, Massachusetts Institute of Technology, 198004)Part B. User's manual and applications of MITEMP / Kathleen Hurley Octavio, Masataka Watanabe, E. Eric Adams, Gerhard H. Jirka, Karl R. Helfrich [and] Donald R.F. Harleman  Part C. A transient analytical model for shallow ... 
Measurement and Analysis of Turbulent Flow of Wood Pulp Fiber Suspensions
(Cambridge, Mass. : Hydrodynamics Laboratory, Dept. of Civil and Sanitary Engineering, Massachusetts Institute of Technology, 195909)In a previous report techniques were described for measuring turbulence and velocity profiles in turbulent shear flows of water and dilute fiber suspensions, and some preliminary results presented. The present report ... 
The Methodology of Bayesian Inference and Decision Making Applied to Extreme Hydrologic Events
(Cambridge, Mass. : Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, Department of Civil Engineering, Massachusetts Institute of Technology, 197401)This study presents the methodology of Bayesian inference and decision making applied to extreme hydrologic events. Inference procedures must consider both the natural or 'modelled' uncertainty of the hydrologic process ... 
Methods, Impacts, and Opportunities in the Concrete Building Life Cycle
(MIT Concrete Sustainability Hub, 201108)Life cycle assessment (LCA) offers a comprehensive approach to evaluating and improving the environmental impacts of buildings. This research explores and advances three key areas relevant to the field of buildings LCA: ... 
Methods, Impacts, and Opportunities in the Concrete Pavement Life Cycle
(MIT Concrete Sustainability Hub, 201108)Life cycle assessment (LCA) offers a comprehensive approach to evaluate and improve the environmental impacts of pavements. This research explores and advances three key areas relevant to the pavement LCA field: methodology, ... 
MINEQL: A Computer Program for the Calculation of Chemical Equilibrium Composition of Aqueous Systems
(Cambridge, Mass. : Water Quality Laboratory, Ralph M. Parsons Laboratory for Water Resources and Environmental Engineering sic, Dept. of Civil Engineering, Massachusetts Institute of Technology, 1976)Introduction: This report describes the computer program for the computation of chemical equilibria in aqueous systems, MINEQL. The purpose of the report is to present the program in sufficient detail that the reader not ... 
Model Study of a Floodcontrol Pumping Station at the Charles River Dam
(Cambridge, Mass. : Hydrodynamics Laboratory, Dept. of Civil and Sanitary Engineering, Massachusetts Institute of Technology, 195906)This report describes the design, construction and testing of a Froudian model of a proposed 8400cfs capacity pumping station, Site restrictions require that the flow approach the high specificspeed pumps asymmetrically ... 
Modelling of Unidirectional Thermal Diffusers in Shallow Water
(Cambridge, Mass. : Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, Dept. of Civil Engineering, Massachusetts Institute of Technology, 197707)This study is an experimental and theoretical investigation of the temperature field and velocity field induced by a unidirectional thermal diffuser in shallow water. A multiport thermal diffuser is essentially a pipe laid ...