The RETC code for quantifying the hydraulic functions of unsaturated soils project summary

Cover of: The RETC code for quantifying the hydraulic functions of unsaturated soils |

Published by U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory in Ada, OK .

Written in English

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Subjects:

  • Soil moisture -- Mathematical models.,
  • Soil permeability -- Mathematical models.,
  • Zone of aeration.

Edition Notes

Book details

StatementM.Th. van Genuchten, F.J. Leij, and S.R. Yates.
ContributionsLeij, F. J., Yates, S. R., Robert S. Kerr Environmental Research Laboratory.
The Physical Object
FormatMicroform
Pagination10 p.
Number of Pages10
ID Numbers
Open LibraryOL17683053M

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The RETC Code for Quantifying the Hydraulic Functions of Unsaturated Soils by M. van Genuchten, F. Leij and S. Yates U.S. Salinity Laboratory U.S. Department of Agriculture, Agricultural Research Service Riverside, California 1 IAG-DW Project Officer Joseph R.

Williams Extramural Activities and Assistance DivisionFile Size: 2MB. The RETC Code for Quantifying the Hydraulic Functions of Unsaturated Soils, Version EPA Report //, U.S. Salinity Laboratory, USDA, ARS, Riverside, California.

(Download PDF. The RETC Code for Quantifying Hydraulic Functions of Unsaturated Soils Article (PDF Available) January with 2, Reads How we measure 'reads'. The RETC Code for Quantifying the Hydraulic Functions of Unsaturated Soils, Version EPA Report //, U.S. Salinity Laboratory, USDA-ARS, Riverside, California.

Technical contact. The RETC code for quantifying the hydraulic functions of unsaturated soils. The RETC code for quantifying the hydraulic functions of unsaturated soils [Van Genuchten, M.

Th] on *FREE* shipping on qualifying offers. The RETC code for quantifying the hydraulic functions of unsaturated soilsAuthor: M. Th Van Genuchten.

The RETC code for quantifying the hydraulic functions of unsaturated soils [] Van Genuchten, Leij, F.J. Yates, S.R. Robert S. Kerr Environmental Research Laboratory (USA); Salinity Laboratory (USA) [Corporate Author]. The RETC Code for Quantifying the Hydraulic Functions of Unsaturated Soils, Version EPA Report //, U.S.

Salinity Laboratory, USDA-ARS, Riverside, California. Related Articles. Van Genuchten,Leij, F.J. and Yates, S.R. () The RETC Code for Quantifying the Hydraulic Functions of Unsaturated Soils. Kerr Environmental Research Laboratory, Ada. has been cited by the following article: TITLE: Nitrogen Distribution Model: A Farmer and Farm-Centred Model to Monitor N Movement in the Soil.

Shows the water retention curve and the hydraulic conductivity function for a number of soil types. For more information about the parameters used see: The RETC code for quantifying the hydraulic functions of unsaturated soils, Van Genuchten, M Th, Leij, F J, Yates, S R.

Out. RETC Program Files (ZIP) (70 K) "The RETC Code for Quantifying the Hydraulic Functions of Unsaturated Soils." Publication No. // Installation Instructions. Go to Windows Explorer and create a directory named RETC. Download the program files and user's manual to the new directory.

Unzip the program files to the RETC directory. To support researchers to publish their research Open Access, deals have been negotiated with various publishers. Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access.

Hydraulic Properties of Unsaturated Soils. Properties reflecting the ability of a soil to retain or transmit water and its dissolved constituents. Part 4, Physical Methods, SSSA Book Series 5, Chapter 7. Madison: Soil Science Society of America, pp.

– Leij, F. J., and Yates, S. R., The RETC code for quantifying the. The RETC code is shown to be useful for a variety of applications includ- ing (i) predicting the Unsaturated hydraulic properties from previously estimated soil hydraulic parameters (the forward prob- lem), (ii) predicting the unsaturated hy- draulic conductivity functions from observed retention data, and (iii) quantifying the hy- draulic.

the retc code for quantifying the hydraulic functions of unsaturated soils. U.S. Environmental Protection Agency, Washington, DC, EPA//S/, Impact/Purpose.

Van Genuchten, F.J. Leij, S.R. YatesThe RETC code for quantifying the hydraulic functions of unsaturated soils Environmental Protection Agency (EPA) ///, USEPA, Robert S. Kerr Environ. EPA/// December The RETC Code for Quantifying the Hydraulic Functions of Unsaturated Soils by M. van Genuchten, F.

Leij and S. Yates U.S. Salinity Laboratory U.S. Department of Agriculture, Agricultural Research Service Riverside, California IAG-DW Project Officer Joseph R. Williams Extramural Activities and Assistance Division Robert S. Kerr. Unsaturated Soils, Hydraulic Properites, Parameter Optimization, RETC, Soil Retention Curve Received: Ma / Accepted: May 9, / Publishe d.

This report describes the RETC computer code for analyzing the soil water retention and hydraulic conductivity functions of unsaturated soils. These hydraulic properties are key parameters in any quantitative description of water flow into and through the unsaturated zone of soils. The program uses the parametric models of Brooks-Corey and van Genuchten to represent the soil water retention.

The RETC code for quantifying the hydraulic functions of unsaturated soils Author: M Th Van Genuchten ; F J Leij ; S R Yates ; Robert S. Kerr Environmental Research Laboratory. Find helpful customer reviews and review ratings for The RETC code for quantifying the hydraulic functions of unsaturated soils at Read honest and.

van Genuchten MT, Leij FJ, Yates SR. The RETC code for quantifying the hydraulic functions of unsaturated soils. Report No. EPA///, R. Kerr Environ. Res. Laboratory, US Environmental Protection Agency, Ada, Oklahoma; p. RETC is a computer program which may be used to analyze the soil water retention and hydraulic conductivity functions of unsaturated soils.

These hydraulic properties are key parameters in any quantitative description of water flow into and through the unsaturated zone of soils. van Genuchten MTH, Leij FJ, Yates SR () The RETC code for quantifying the hydraulic functions of unsaturated soils.

USDA, US Salinity Laboratory, Riverside, California. United States EPA document EPA/// Google Scholar. Šútor, J. – Skalová, J. – Štekauerová, V. () Pedotransférové funkcie pre stanovenie bodov vlhkostných retencných kriviek pôd Záhorskej nížiny (Pedotransfer functions for the determination of points of moisture retention curves in the soils of the Zahorska Lowland).

Get this from a library. The RETC code for quantifying the hydraulic functions of unsaturated soils: project summary. [M Th Van Genuchten; F J Leij; S R Yates. The RETC code for quantifying the hydraulic functions of unsaturated soil. US Environmental Protection Agency, Washington, D.C.

EPA Research Document EPA/6-// Google Scholar. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. SSSAJ 7van Genuchten, M.T., F.J. Leij, and S.R. Yates. The RETC code for quantifying the hydraulic functions of unsaturated soils.

Robert S. RETC, version Old functions: van Genuchten () - Brooks and Corey () New functions: Lognormal distribution model (Kosugi, )-Dual porosity model (Durner, ) The RETC program for quantifying the hydraulic functions of unsaturated soils 25 26   RETC is a computer code for quantifying the hydraulic functions of unsaturated soils.

For UHCs, τ and K s were optimized during the fitting procedure because of the inaccuracy of K s measurements or missing K s values in some of the reanalysed papers (Dettmann et al., ; Gnatowski et al., ; Schwärzel et al., ; Schwärzel et al. The RETC code for quantifying the hydraulic functions of unsaturated soils, Report EPA//S2–91/, U.S.

Department of Agriculture, Agriculture Research Service. National Risk Management Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, Ohio. Google Scholar.

A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Science Society of America Journal, 44, – van Genuchten, M.T., Familiar with Following Softwares: 1) RETC: RETC (RETention Curve) is a computer program for quantifying Hydraulic Functions of Unsaturated Soils (Soil Water Retention and Hydraulic Conductivity Functions).

[Link to Download Program and Manuals/Documents] 2) ROSETTA: Familiar with Following Softwares: 1) RETC: RETC (RETention Curve) is a computer program for quantifying. Tina plain. The soils of El-Tina plain are characterized by a heterorganic texture.

So, quantifying the variations in the hydraulic properties of El-Tina plain soils is urgent task to achieve optimum water management. RETC is a computer program which can be used to estimate soil hydraulic functions from easily determined properties.

6van Genuchten, M.T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. SSSAJ 7van Genuchten, M.T., F.J. Leij, and S.R. Yates. The RETC code for quantifying the hydraulic functions of unsaturated soils. Some observations on the infiltration of water into soils / G.A.

Jobling and A.K. Turner; Determination of effective porosity of soil materials [microform]: project summary / Robert Horton, Mic The RETC code for quantifying the hydraulic functions of unsaturated soils [microform]: project summary. The RETC code for quantifying the hydraulic functions of unsaturated soils.

Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Ada. The RETC programmings (US Salinity Laboratory, USDA, ARS) were also applied using the Marquardt’s algorithm of the non-linear optimization. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils.

Soil Sci. Van GenuchtenLeij F.J., Yates S.R. The RETC code for quantifying. unsaturated hydraulic properties, i.e.,the water retention function, 8(h), and the hydraulic conductivity function, K(0) or K(h), or the diffusivity function, D(0).Various pore-size distribution models have been developed based on physico-empirical grounds [Brutsaert, ; Mualem, ].

These models depend on the pore- or particle-size. Although we examined a number of available models, we evaluated and tested the following models, which we considered as most suitable for our project: SWMS_2D, UNSAT2, LEACHM, and HYDRUS.

We also employed the RETC code for quantifying the hydraulic functions of unsaturated soils. A general overview of each one of these models follows. The RETC code for quantifying the hydraulic functions of unsaturated soils M. Th. van Genuchten, Feike J.

Leij, Scott R. Yates Geography, Environmental Science.of the RETC (for quantifying the hydraulic functions of unsaturated soils) and STANMOD (for evaluating solute transport in the subsurface using analytical solutions of the convection-dispersion equation) codes will also be demonstrated in the course.

The RETC code will be provided to all participants. INSTRUCTORS.A number of factors are known to influence the hydraulic conductivity (K) of soils.

While a large number of laboratory and field methods have been developed over the years, most of them are applicable mainly for the measurement of hydraulic properties in saturated soils.

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