Browsing by Author "Eagleson, Peter S."

Now showing items 1-20 of 22

    • Atmospheric Water Vapor Transport: Estimation of Continental Precipitation Recycling and Parameterization of a Simple Climate Model 

      Brubaker, Kaye L.; Entekhabi, Dara; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1991-07)
      The advective transport of atmospheric water vapor and its role in global hydrology and the water balance of continental regions are discussed and explored. The data set consists of ten years of global wind and humidity ...

    • Climatology of Station Storm Rainfall in the Continental United States: Parameters of the Bartlett-Lewis and Poisson Rectangular Pulses Models 

      Hawk, Kelly Lynn; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Dept. of Civil Engineering, Massachusetts Institute of Technology, 1992-05)
      The parameters of two stochastic models of point rainfall, the Bartlett-Lewis model and the Poisson rectangular pulses model, are estimated for each month of the year from the historical records of hourly precipitation at ...

    • Constrained Stochastic Climate Simulation 

      Curtis, David Carleton; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982-05)
      A stochastic, multivariate, hydrometeorological data generation algorithm is presented. Hourly values of precipitation, cloud cover, shortwave radiation, longwave radiation, temperature, dewpoint, wind speed, and wind ...

    • Coupled Flux of Heat and Moisture Across a Snowcovered Landsurface with Vegetation 

      Gordon, Matthew J.; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982-04)
      A theoretical study of snow accumulation and ablation in vegetated areas is presented. A one-dimensional energy and mass balance model of winter (non-transpiring) vegetation is coupled to an existing one-dimensional energy ...

    • The Coupled Transport of Water and Heat in a Vertical Soil Column Under Atmospheric Excitation 

      Milly, P. Christopher D.; Eagleson, Peter S. (Cambridge, Mass. : Massachusetts Institute of Technology, Dept. of Civil Engineering, Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, 1980-07)
      The purpose of this work is to develop a detailed, physically-based model of the response of the land surface to atmospheric forcing. The coupled, nonlinear partial differential equations governing mass and heat transport ...

    • A Distributed Linear Representation of Surface Runoff 

      Maddaus, William O.; Eagleson, Peter S. (Cambridge, Mass. : Hydrodynamics Laboratory, Department of Civil Engineering, Massachusetts Institute of Technology, 1969-06)
      A distributed quasi-linear model of direct catchment runoff is developed consisting of cascades of linear reservoirs connected by linear channels. By fitting to the kinematic wave, the model parameters are expressed in ...

    • The Effects of Annual Storage and Random Potential Evapotranspiration on the One-dimensional Annual Water Balance 

      Metzger, Bernhard H.; Eagleson, Peter S. (Cambridge : Massachusetts Institute of Technology, Dept. of Civil Engineering, Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, 1980-02)
      An analysis is presented leading to the incorporation of storage terms into an existing first-order dynamic water balance. Annual change in storage in the unsaturated zone of an idealized soil column is included through ...

    • Estimation of Effective Hydrologic Properties of Soils from Observations of Vegetation Density 

      Tellers, Tobin E.; Eagleson, Peter S. (Cambridge, Mass. : Massachusetts Institute of Technology, Dept. of Civil Engineering, Ralph M. Parsons Laboratory for Water Resources and Hydrodynamics, 1980-03)
      An existing one-dimensional model of the annual water balance is reviewed. Slight improvements are made in the method of calculating the bare soil component of evaporation, and in the way surface retention is handled. A ...

    • Extensions and Applications of a Second-order Landsurface Parameterization 

      Andreou, Stefanos A.; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1983-07)

    • The Implementation and Validation of Improved Landsurface Hydrology in an Atmospheric General Circulation Model 

      Johnson, Kevin D.; Entekhabi, Dara; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Dept. of Civil Engineering, Massachusetts Institute of Technology, 1991-10)
      New landsurface hydrological parameterizations are implemented into the NASA Goddard Institute for Space Studies (GISS) General Circulation Model (GCM). These parameterizations are: 1) runoff and evapotranspiration functions ...

    • Infiltration and Evaporation at Inhomogeneous Land Surfaces 

      Milly, P. Christopher D.; Eagleson, Peter S. (Cambridge, Mass. : Report / Ralph M. Parson Laboratory, Hydrology and Water Resource Systems, Dept. of Civil Engineering, School of Engineering, Massachusetts Institute of Technology, 1982-06)
      The local response of the land surface to atmospheric forcing is determined by the surface parameters, the surface state, and the forcing. Because these factors are highly variable at length scales smaller than those of ...

    • Interaction of the Saturated and Unsaturated Soil Moisture Zones. 1. Analytical Solution of the Linearized Richards Equation. 2. The Role of Climate in Shaping the Phreatic Surface 

      Miller, Scott Allan; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982-08)
      In Part I, dimensionless analytical expressions are derived describing the hydrologic processes and the moisture distribution of a high water table unsaturated soil column, by linearizing Richards' equation. The finite ...

    • Landsurface Hydrology Parameterization for Atmospheric General Circulation Models: Inclusion of Subgrid Scale Spatial Variability and Screening with a Simple Climate Model 

      Entekhabi, Dara; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1989-09)
      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 ...

    • Parameterization of Moisture and Heat Fluxes Across the Land Surface for Use in Atmospheric General Circulation Models 

      Milly, P. Christopher D.; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resources Systems , Dept. of Civil Engineering, School of Engineering, Massachusetts Institute of Technology, 1982-06)
      The response of a bare soil surface to atmospheric forcing -- rain, wind, sunshine, etc. -- may be expressed in terms of the resultant evaporation rate and sensible and radiant heat losses. Examining the earth-atmosphere ...

    • Physically-based Parameterization of Spatially Variable Soil and Vegetation Using Satellite Multispectral Data 

      Jasinski, Michael F.; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1989-09)
      A stochastic-geometric landsurface reflectance model is formulated and tested for the parameterization of spatially variable vegetation and soil at subpixel scales using satellite multispectral images without ground truth. ...

    • A Second-order Budyko-type Parameterization of Landsurface Hydrology 

      Andreou, Stefanos A.; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982-06)
      This work develops a simple, second-order parameterization of the water fluxes at a landsurface for use as the appropriate boundary condition in general circulation models of the global atmosphere. The derived parameterization ...

    • Spatial Analysis of Storm Depths from an Arizona Raingage Network 

      Fennessey, Neil M.; Eagleson, Peter S.; Qinliang, Wang; Rodriguez-Iturbe, Ignacio (Cambridge, Mass : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems,Dept. of Civil Engineering, School of Engineering, Massachusetts Institute of Technology, 1986-08)
      Eight years of summer rainstorm observations are analyzed by a dense network of 93 raingages operated by the U. S. Department of Agriculture, Agricultural Research Service, in the 150 km Walnut Gulch experimental catchment ...

    • Spatial Poisson Models of Stationary Storm Rainfall: Parameterization, Evaluation and Numerical Simulation 

      Fennessey, Neil M.; Qinliang, Wang; Eagleson, Peter S.; Rodriguez-Iturbe, Ignacio (Cambridge, Mass : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Dept. of Civil Engineering, School of Engineering, Massachusetts Institute of Technology, 1986-08)
      Eight years of summer raingage observations are analyzed for a dense, 93 raingage, network operated by the U.S. Department of Agriculture, Agricultural Research Service, in the 150 km2 Walnut Gulch catchment near Tucson, ...

    • Surface Area Variability of the Bahr el Ghazal Swamp in the Presence of Perimeter Canals 

      Gaudet, Sharron C.; Eagleson, Peter S. (Cambridge, Mass. : Dept. of Civil Engineering, Massachusetts Institute of Technology, 1984-06)

    • A Test of Ecological Optimality for Semiarid Vegetation 

      Salvucci, Guido D.; Eagleson, Peter S. (Cambridge, Mass. : Ralph M. Parsons Laboratory, Hydrology and Water Resource Systems, Massachusetts Institute of Technology, Dept. of Civil Engineering, 1992-05)
      Three ecological optimality hypotheses (Eagleson, 1978 and 1982) which have utility in parameter reduction and estimation in a climate-soil-vegetation water balance model are reviewed and tested. The first hypothesis ...