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
Citations
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Design methodology accounting for the effects of porous medium heterogeneity on hydraulic residence time and biodegradation in horizontal subsurface flow constructed wetlands
TL;DR: In this article, a methodology for wetland design that accounts for the effect of heterogeneous hydraulic properties of the porous substrate on the hydraulic residence time distribution and treatment efficiency is presented. But, the authors do not consider the impact of substrate heterogeneity on wetland treatment efficiency.
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Transient groundwater modeling using spreadsheets
Halil Karahan,M. Tamer Ayvaz +1 more
TL;DR: This study proposes a transient groundwater modeling using spreadsheet simulation (TGMSS) model for solving groundwater problems and showed that the TGMSS and MODFLOW results were in good agreement in terms of resulting values of hydraulic heads in all cases.
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Catchment-scale non-linear groundwater-surface water interactions in densely drained lowland catchments
TL;DR: In this paper, a systematic spatial averaging approach is proposed to derive catchment-scale storage and discharge from point-scale water balances, where the effects of spatial heterogeneity in soil properties, vegetation, and drainage network are lumped and described by a relation between groundwater storage and the spatial probability distribution of groundwater depths with measurable parameters.
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A decision-logic framework for investigating subsidence problems potentially attributable to gypsum karstification
TL;DR: In this paper, a decision-logic framework is presented to tackle the issue of gypsum karstification in the UK underlain by gypsiferous rocks, which comprises subsidence description identification of causal mechanisms; construction and evaluation of conceptual models; evaluation and parameterization of fundamental processes and development of a management strategy.
Journal ArticleDOI
Identifying water sources used by alpine riparian plants in a restoration zone on the Qinghai-Tibet Plateau: Evidence from stable isotopes.
TL;DR: Results showed significant differences in the isotopic signatures of M. squamosa from the light, moderate, and severe degradation sites across seasons, suggesting that M.squamosa depended on a high degree of flexible plasticity in water use to alleviate water stress along the gradual degradation.
References
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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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