Sensitivity Analysis and Validation for Numerical Simulation of Water Infiltration into Unsaturated Soil.
A FORTRAN code for liquid water flow in unsaturated soil under the isothermal condition was developed to simulate wate infiltration into Yolo light clay. The governing equation, that is, Richards' equation, was approximated by the finite-difference method. A normalized sensitivity coefficient was us...
| Publicado en: | International Scholarly Research Notices pp. 1 - 8 |
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| Autores principales: | , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Wiley-Blackwell
2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=125673839&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 125673839 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 23567872 JWZI jtl: International Scholarly Research Notices issn: 23567872 maglogo: N pubinfo: dt: 2015 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 125673839 125673839 125673839 10.1155/2015/824721 125673839 ppf: 1 ppct: 7 formats: fmt: @attributes: type: P tig: atl: Sensitivity Analysis and Validation for Numerical Simulation of Water Infiltration into Unsaturated Soil. aug: au: Eng Giap Goh Kosuke Noborio affil: Graduate School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki 214-8571, Japan sug: subj: Sensitivity and Specificity Soil Water Mathematics Simulations ab: A FORTRAN code for liquid water flow in unsaturated soil under the isothermal condition was developed to simulate wate infiltration into Yolo light clay. The governing equation, that is, Richards' equation, was approximated by the finite-difference method. A normalized sensitivity coefficient was used in the sensitivity analysis of Richards' equation. Normalized sensitivity coefficient was calculated using one-at-a-time (OAT) method and elementary effects (EE) method based on hydraulic functions for matric suction and hydraulic conductivity. Results from EE method provided additional insight into model input parameters, such as input parameter linearity and oscillating sign effect. Boundary volumetric water content (θL (upper bound)) and saturated volumetric water content (θs) were consistently found to be the most sensitive parameters corresponding to positive and negative relations, as given by the hydraulic functions. In addition, although initial volumetric water content (θL (initial cond)) and timestep size (Δt), respectively, possessed a great amount of sensitivity coefficient and uncertainty value, they did not exhibit significant influence on model output as demonstrated by spatial discretization size (Δz). The input multiplication of parameters sensitivity coefficient and uncertainty value was found to affect the outcome of model simulation, in which parameter with the highest value was found to be Δz. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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