Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil

Retention curves describe water dynamics in the soil and represent the relationship between the energy of water retention and moisture content. Several empirical models of water retention curve settings in the soil are analyzed (Van Genuchten-VG, Brooks & Corey BC, Bruce & Luxmore-BL...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ferreira B,Herlon B, Oliveira B,Rafael, de Oliveira S,Wesley, Chaves F,Francisco G, Bezerra C,Fabricia G
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2012
Materias:	water use efficiency performance irrigation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292012000300009
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-34292012000300009
record_format	dspace
spelling	oai:scielo:S0718-342920120003000092013-02-04Empirical models for estimating water retention curves in soil in Janaúba-MG, BrazilFerreira B,Herlon BOliveira B,Rafaelde Oliveira S,WesleyChaves F,Francisco GBezerra C,Fabricia G water use efficiency performance irrigation Retention curves describe water dynamics in the soil and represent the relationship between the energy of water retention and moisture content. Several empirical models of water retention curve settings in the soil are analyzed (Van Genuchten-VG, Brooks & Corey BC, Bruce & Luxmore-BL and Driessen-D). Deformed soil samples were collected at 10 sites per plot; a compound sample was established with 36 plots between October and November 2007, at depths 0-20 cm and 20-40 cm in the Irrigation District of Gorutuba in Janaúba MG, Brazil. Tensions used for tests were 10, 30, 100, 500 and 1500 kPa. Soil Water Retention Curve software was employed to obtain the parameters of the empirical equations. The performance of empirical models was obtained by the index suggested by Camargo & Sentelhas, coupled to estimate standard error, standard deviation and coefficient of variation. The results showed that the VG model had the best performance compared to the other models tested for data on water retention in the soil. The BC model had the most unsatisfactory performance.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.30 n.3 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292012000300009en10.4067/S0718-34292012000300009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	water use efficiency performance irrigation
spellingShingle	water use efficiency performance irrigation Ferreira B,Herlon B Oliveira B,Rafael de Oliveira S,Wesley Chaves F,Francisco G Bezerra C,Fabricia G Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil
description	Retention curves describe water dynamics in the soil and represent the relationship between the energy of water retention and moisture content. Several empirical models of water retention curve settings in the soil are analyzed (Van Genuchten-VG, Brooks & Corey BC, Bruce & Luxmore-BL and Driessen-D). Deformed soil samples were collected at 10 sites per plot; a compound sample was established with 36 plots between October and November 2007, at depths 0-20 cm and 20-40 cm in the Irrigation District of Gorutuba in Janaúba MG, Brazil. Tensions used for tests were 10, 30, 100, 500 and 1500 kPa. Soil Water Retention Curve software was employed to obtain the parameters of the empirical equations. The performance of empirical models was obtained by the index suggested by Camargo & Sentelhas, coupled to estimate standard error, standard deviation and coefficient of variation. The results showed that the VG model had the best performance compared to the other models tested for data on water retention in the soil. The BC model had the most unsatisfactory performance.
author	Ferreira B,Herlon B Oliveira B,Rafael de Oliveira S,Wesley Chaves F,Francisco G Bezerra C,Fabricia G
author_facet	Ferreira B,Herlon B Oliveira B,Rafael de Oliveira S,Wesley Chaves F,Francisco G Bezerra C,Fabricia G
author_sort	Ferreira B,Herlon B
title	Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil
title_short	Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil
title_full	Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil
title_fullStr	Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil
title_full_unstemmed	Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil
title_sort	empirical models for estimating water retention curves in soil in janaúba-mg, brazil
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292012000300009
work_keys_str_mv	AT ferreirabherlonb empiricalmodelsforestimatingwaterretentioncurvesinsoilinjanaubamgbrazil AT oliveirabrafael empiricalmodelsforestimatingwaterretentioncurvesinsoilinjanaubamgbrazil AT deoliveiraswesley empiricalmodelsforestimatingwaterretentioncurvesinsoilinjanaubamgbrazil AT chavesffranciscog empiricalmodelsforestimatingwaterretentioncurvesinsoilinjanaubamgbrazil AT bezerracfabriciag empiricalmodelsforestimatingwaterretentioncurvesinsoilinjanaubamgbrazil
_version_	1714203682013184000

Empirical models for estimating water retention curves in soil in Janaúba-MG, Brazil

Ejemplares similares