A modular three-dimensional finite-difference ground-water flow model
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A computer program for simulating ground-water flow in three dimensions by using a block-centered finite-difference approach and has a modular structure, which permits the addition of new packages to the program without modifying existing packages.Abstract:
A computer program for simulating ground-water flow in three dimensions is presented. This report includes detailed explanations of physical and mathematical concepts on which the model is developed. Ground-water flow within the aquifer is simulated by using a block-centered finite-difference approach. The program is written in Fortran 77 and has a modular structure, which permits the addition of new packages to the program without modifying existing packages.read more
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Proceedings ArticleDOI
Methods and Guidelines for Effective Model Calibration
TL;DR: This document summarizes current capabilities, research and operational priorities, and plans for further studies that were established at the 2015 USGS workshop on quantitative hazard assessments of earthquake-triggered landsliding and liquefaction in the Central American region.
Journal ArticleDOI
Seasonal variation in surface‐subsurface water exchange and lateral hyporheic area of two stream‐aquifer systems
TL;DR: In this article, the authors used two-dimensional unconfined transient groundwater flow models to investigate the interface between stream and groundwater flow systems, or hyporheic zone, of two first-order streams that drain catchments with distinctly different alluvial sediments and bedrock lithology.
Journal ArticleDOI
From safe yield to sustainable development of water resources—the Kansas experience
TL;DR: A synthesis of water sustainability issues from the hydrologic perspective is presented in this article, which shows that safe yield is a flawed concept and that sustainability is an idea that is broadly used but perhaps not well understood.
OtherDOI
User's guide to SEAWAT; a computer program for simulation of three-dimensional variable-density ground-water flow
TL;DR: This chapter discusses the design and structure of the SEAWAT Program, and discusses Darcy’s Law in Terms of Equivalent Freshwater Head, as well as other aspects of variable-Density flow mechanics.
Journal ArticleDOI
Data assimilation for transient flow in geologic formations via ensemble Kalman filter
Yan Chen,Dongxiao Zhang +1 more
TL;DR: In this study, the ensemble Kalman filter (EnKF) approach is used for continuously updating model parameters such as hydraulic conductivity and model variables such as pressure head while simultaneously providing an estimate of the uncertainty through assimilating dynamic and static measurements, without resorting to the explicit computation of the covariance or the Jacobian of the state variables.
References
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Journal ArticleDOI
Applied Numerical Analysis. By C.F. Gerald. Pp. xii, 340. £3·60. 1970. (Addison-Wesley.)
Book
Finite Element Simulation in Surface and Subsurface Hydrology
George F. Pinder,William G. Gray +1 more
Book
Methods for the Numerical Solution of Partial Differential Equations
Von Rosenberg,U Dale +1 more
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