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Browsing Hydrologic Discovery - Oral Presentations (Videos) by Title
Now showing items 7-26 of 30
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B1. Laplace - Boussinesq: 3-1.
(Internet-First University Press, 2012-05)In 1993, Jean-Yves Parlange developed a very generic solution for the Laplace equation in the archetypal drainage geometry of an aquifer on an impermeable layer between two parallel drains with linearized boundary conditions. ... -
B2. The Isotopic Age of Runoff in Natural Flow Systems
(Internet-First University Press, 2012-05)This paper outlines a theory describing fundamental controls on the isotopic “age” of runoff from watersheds. In this context “age” is defined as the time since the water and environmental tracer entered the system as ... -
B3. Climate-vegetation-soil Interactions and Long-term Hydrologic partitioning: Signatures of Catchment Co-evolution?
(Internet-First University Press, 2012-05)Catchment hydrologic partitioning, regional vegetation composition and soil properties are strongly affected by climate (Budyko, 1974; Whittaker, 1962; Jenny, 1941), but the effects of climate-vegetation-soil interactions ... -
B4. Capillary Effects on Groundwater Waves in Unconfined Coastal Aquifers
(Internet-First University Press, 2012-05)Various types of Boussinesq model exist, including those that account for finite-depth aquifers and capillary effects. Such models are used to simulate propagation of groundwater waves (watertable fluctuations) due to, for ... -
C1. Macro-scale Evidence of Pore-scale Processes: The Promise and Peril seen in 40 years of Studying Fingered Flow
(Internet-First University Press, 2012-05)Fingered flow in coarse textured media has long been studied as an exemplar system for exhibiting the interplay between gravity and capillarity at easily observable scales. Early work by Parlange and Hill explained the ... -
C2. Preferential Flow and Extensions to Richards Equation
(Internet-First University Press, 2012-05)Multi-phase flow instabilities have always been a great interest in fluid flow in porous media, as they can create fingers and drastically change the travel times of solutes to ground water and/or change the sweep efficiency. ... -
C3. On Wettability and Unstable Flow in Porous Media
(Internet-First University Press, 2012-05)The effect of contact angle (CA) between water and porous media on flow regime in water repellent and sub-critically repellent soils will be illustrated and discussed. Water flow pattern that was monitored in a thin ... -
D1. Parameterization for Atmospheric Radiation: Some New Perspectives
(Internet-First University Press, 2012-05)We first introduce Wilfried Brutsaert’s contributions to atmospheric radiation in terms of his original work on deriving a simplified broadband emissivity for calculating downwelling long-wave radiation at the ground. This ... -
D2. On a Derivable Formula for Long-Wave Radiation from Clear Skies: A Theoretical and Practical Contribution
(Internet-First University Press, 2012-05)This talk will focus on the theoretical and practical contribution of Wilfried Brutsaert’s 1975 article On a Derivable Formula for Long-Wave Radiation from Clear Skies. This seminal intellectual advancement will be considered ... -
E1. Mean Velocity Profile in a Sheared and Thermally Stratified Atmospheric Boundary Layer
(Internet-First University Press, 2012-05)Most human activity and biological processes occur within the lower atmosphere, a thermally stratified region characterized by shear and buoyancy-driven turbulence. Thermal stratification arises because of diurnal heating ... -
E2. Working with Wilfried Brutsaert: Some Old and New Results on Radiative Dissipation of Temperature Fluctuations and Scalar Similarity in the Surface Layer
(2012-05)There is a style of thinking and approaching a problem to be learned from every good teacher. In this presentation, an attempt is made at giving an objective account of two subjects that I worked on as W. Brutsaert’s ... -
E3. Large Eddy Simulation Study of Scalar Transport in a Wind Turbine Array Atmospheric Boundary Layer
(2012-05)The structure of the turbulent atmospheric boundary layer is affected by the presence of thermal stratification. Brutsaert’s contributions to understanding and parameterizing such effects have had great impact in the field. ... -
E4. Probing the Atmospheric Boundary Layer: a Life-long Adventure Thanks to Wilfried Brutsaert
(Internet-First University Press, 2012-05)During the 1986 Hapex-Mobilhy field campaign, deep in the middle of Les Landes pine forest of southwest France, we released more than 500 radiosondes to measure vertical profiles of temperature, humidity and wind speed in ... -
F1. An index of maximal land-atmosphere coupling and its use in estimating evaporative fraction across a range of Ameriflux sites
(Internet-First University Press, 2012-05)Examination of heat and moisture fluxes at a wide range of Ameriflux sites reveals what appears to be an emergent property of the relative humidity profile, possibly due to strong coupling of the land-atmosphere system. ... -
F2. Evaporation from Lake Kasumigaura: Bulk Coefficients and Spatial Distribution of Latent Heat Flux
(Internet-First University Press, 2012-05)Study of lake evaporation includes various aspects of Dr Brutsaert’s interests such as the exchange processes on water surface, the development of internal boundary layer, estimation of evaporation rate, among others. In ... -
F3. Regional Evaporation Using Atmospheric Boundary Layer Profiles (a.k.a Brutsaert’s Balloons)
(Internet-First University Press, 2012-05)Land surface temperature (LST) from thermal remote sensing is a surface boundary condition that is strongly linked to the partitioning of the available energy between latent (evapotranspiration) and sensible heat flux. ... -
G1. Infiltration into Soils
(Internet-First University Press, 2012-05) -
G2. Snippets from Infiltration: Where Approximate Becomes Exact
(Internet-First University Press, 2012-05)The Darcy-Buckingham macroscopic approach to soil-water modelling, leading to a nonlinear Richards’ diffusion-convection equation, has been very useful for many decades. Some sharp results of the 1970s by W. Brutsaert and ... -
H1. Groenevelt Autobiography
(Internet-First University Press, 2012-05)Pieter H. Groenevelt, using time reallocated due to absence of a speaker, provided a broad view of his life experience and expressed his heartfelt gratitude for the generosity beyond belief he received after World War II. -
H2. Hot Thermodynamics for Frozen Soils
(Internet-First University Press, 2012-05)Q. What is the driving force that lifts buildings, pipelines and roads into the air when the soil underneath freezes? A. Ask Clapeyron……A unifying theory is proposed, bringing together the CRRELL School of Duwayne Anderson ...
