Showing papers in "Advances in Water Resources in 2002"

TL;DR: In this article, statistical downscaling of hydrologic extremes is considered, and future challenges such as the development of more rigorous statistical methodology for regional analysis of extremes, as well as the extension of Bayesian methods to more fully quantify uncertainty in extremal estimation are reviewed.

TL;DR: In this paper, the authors analyze measurements, conceptual pictures, and mathematical models of flow and transport phenomena in fractured rock systems, including water flow, conservative and reactive solutes, and two-phase flow.

TL;DR: Pore-network models have been used to describe a wide range of properties from capillary pressure characteristics to interfacial area and mass transfer coefficients as mentioned in this paper, where the void space of a rock or soil is described as a network of pores connected by throats.

TL;DR: In this article, the state variables of land surface temperature from thermal infrared data, surface soil moisture from passive microwave data, snow cover using both visible and microwave data and estimating landscape surface roughness using lidar are considered.

TL;DR: In this article, the authors discuss the issues of radar-rainfall product development, and the theoretical and practical requirements of validating radarrainfall maps and new radar technologies, and discuss a framework for reflectivity based rainfall estimation.

TL;DR: Weaknesses and inconsistencies of current model-verification methods are discussed as well as benchmark solutions for solving the coupled spatio-temporal convection process, consistent velocity approximation, and error-based mesh adaptation techniques.

TL;DR: In this paper, the authors describe a model to simulate HOC sorption as the combined effect of adsorption to thermally altered carbonaceous materials and a more linear solvation-driven absorption into gel-like organic matter.

TL;DR: In this paper, a probabilistic-mechanistic model of soil water balance was used for the characterization of the seasonal regimes of soil moisture with different combinations of climate, soil, and vegetation.

TL;DR: A review of physical, chemical, and biological processes governing microbial transport in the saturated subsurface is presented in this paper, where a conceptual model of the interactions between cell surface structures and other surfaces is introduced.

TL;DR: The hydrologic data assimilation problem can be posed in a probabilistic framework that emphasizes the need to account for uncertainty when combining different sources of information and indicates where approximations need to be introduced.

TL;DR: Some philosophical considerations related to model complexity, data availability and predictive performance are discussed, highlighting the potential of observed patterns in moving the science and practice of catchment hydrology forward.

TL;DR: In this paper, the authors developed a multidimensional numerical simulator to model non-isothermal multiphase multicomponent flow and transport processes in the subsurface, where they considered the transfer of mass and energy between the phases in addition to the flow processes such as advection and diffusion.

TL;DR: In this article, a number of powerful approaches have been developed to intelligently reduce the number of degrees of freedom in very complex heterogeneous environs, e.g., mathematical homogenization, mixture and hybrid mixture theory, spatial averaging, moment methods, central limit or Martingale methods, stochastic-convective approaches, various other Eulerian and Lagrangian perturbation schemes, projection operators, renormalization group techniques, variational approaches, space transformational methods, continuous time random walks, and etc.

TL;DR: In this paper, a coupled aquifer-land surface-atmosphere model was developed to study aquifer interaction in watersheds, on decadal timescales, where a single column vertically discretized atmospheric model was linked to a distributed soil-vegetation-aquifer model.

TL;DR: In this paper, a discontinuous Galerkin (DG) finite element method is described for the two-dimensional, depth-integrated shallow water equations (SWEs) based on formulating the SWEs as a system of conservation laws, or advection-diffusion equations.

TL;DR: In this paper, the authors provide a comprehensive modelling framework, including geochemical reactions and interphase mass transfer processes such as sorption/desorption, NAPL dissolution and mineral precipitatation/dissolution, all of which can be in equilibrium or kinetically controlled.

TL;DR: The niched Pareto genetic algorithm (NPGA) is demonstrated to outperform both the SGA algorithm and the RS by generating a better tradeoff curve and was found to be robust with respect to the other algorithm parameters (tournament size and niche radius) when using an optimal population size.

TL;DR: In this article, the authors used the concept of phase-space reconstruction, i.e., reconstruction of the single-dimensional (or variable) runoff series in a multi-dimensional phase space to represent its dynamics.

TL;DR: An overview of the most common numerical solution strategies for the incompressible Navier–Stokes equations, including fully implicit formulations, artificial compressibility methods, penalty formulations, and operator splitting methods are presented.

TL;DR: For problems of convection-diffusion type, Eulerian-Lagrangian localized adjoint methods provide a methodology that maintains the accuracy and efficiency of Eulerians, while also conserving mass and systematically treating any type of boundary condition as mentioned in this paper.

TL;DR: In this article, the authors derived more general solutions to the hillslope-storage kinematic wave equation for subsurface flow, applicable to a wide range of complex hillslopes.

TL;DR: It is suggested that future directions of research include the application of direct search solution methods, and developments in stochastic and multi-objective optimization, as a means for benchmarking and comparing optimization approaches.

TL;DR: In this paper, a simple numerical model based on the non-linear kinematic wave was used for comparing the results for hypothetical storms moving up and down an impervious plane surface.

TL;DR: In this article, the authors used Granger causality to identify the presence of one-and two-way coupling between terms in noisy multivariate dynamical systems using data from Illinois.

TL;DR: In this paper, a lattice Boltzmann model was proposed for 2D advection and anisotropic dispersion equation (AADE) based on the Bhatnagar, Gross and Krook (BGK) model.

TL;DR: In this article, critical path analysis from percolation theory is used to calculate the unsaturated hydraulic conductivity, K (S ), of soils with pore space compatible with a (sometimes complex) fractal description.

TL;DR: In this paper, the sensitivity of the model with respect to model parameters is investigated and the definition of the mathematical benchmark problem is defined. But the sensitivity is not investigated in this paper.

TL;DR: In this paper, the authors investigated the effect of serial correlation on the ability of the nonparametric Mann-Whitney (MW) statistical test to detect a shift in median or mean in hydrological time series.

TL;DR: In this article, the authors present experiments conducted in sand-packed columns with initially steady unsaturated flow conditions that show significant biomass-induced changes in pressure heads and water contents and permeability reduction during growth of a Pseudomonas fluorescens bacterium, and discuss characteristics of unsaturated or variably saturated porous media that may be important to consider when modeling such phenomena in these systems.

TL;DR: In this article, an analytical solution is derived for tidal fluctuations in a coupled coastal aquifer system consisting of a semi-confined aquifer, a thin semi-permeable layer and a phreatic aquifer.