| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | mtc-m16b.sid.inpe.br (namespace prefix: upn:K28A8B) |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Repository | cptec.inpe.br/adm_conf/2005/10.28.12.18 |
| Last Update | 2006:04.16.18.11.58 (UTC) administrator |
| Metadata Repository | cptec.inpe.br/adm_conf/2005/10.28.12.18.47 |
| Metadata Last Update | 2018:06.05.03.42.49 (UTC) administrator |
| Citation Key | GassmannGardSeri:2006:SoWaCo |
| Title | Soil water content simulations under water stress conditions  |
| Format | CD-ROM, On-line. |
| Year | 2006 |
| Access Date | 2025, Dec. 07 |
| Secondary Type | PRE CI |
| Number of Files | 1 |
| Size | 272 KiB |
| 2. Context | |
| Author | 1 Gassmann, María Isabel 2 Gardiol, Jesús María 3 Serio, Leonardo |
| Affiliation | 1 Departamento de Cs. de la Atmósfera y los Océanos, Facultad de Cs. Exactas y Naturales (UBA), Piso 2 Pabelló 2 n 2, (C1428EHA) Cdad Universitaria, Buenos Aires, Argentina (Gassmann, Gardiol) 3 Cátedra de Climatología, Facultad de Agronomía (UBA), Av. San Martín 4453, (1417) Buenos Aires, Argentina |
| Author e-Mail Address | 1 gassmann@at.fcen.uba.ar 2 gardiol@at.fcen.uba.ar 3 serio@agro.uba.ar |
| Editor | Vera, Carolina Nobre, Carlos |
| e-Mail Address | gassmann@at.fcen.uba.ar |
| Conference Name | International Conference on Southern Hemisphere Meteorology and Oceanography, 8 (ICSHMO). |
| Conference Location | Foz do Iguaçu |
| Date | 24-28 Apr. 2006 |
| Publisher | American Meteorological Society (AMS) |
| Publisher City | 45 Beacon Hill Road, Boston, MA, USA |
| Pages | 759-763 |
| Book Title | Proceedings |
| Tertiary Type | Poster |
| Organization | American Meteorological Society (AMS) |
| History (UTC) | 2005-10-28 12:18:47 :: gassmann@at.fcen.uba.ar -> adm_conf :: 2005-12-16 01:55:15 :: adm_conf -> gassmann@at.fcen.uba.ar :: 2006-03-03 16:38:12 :: gassmann@at.fcen.uba.ar -> administrator :: 2006-04-18 21:00:25 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:27 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:56:20 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:05:49 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:52:09 :: administrator -> banon :: 2006 2011-01-02 17:14:48 :: banon -> administrator :: 2006 2018-06-05 03:42:49 :: administrator -> :: 2006 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Keywords | soil water content water balance model water stress Buenos Aires Province |
| Abstract | A simple balance model was used to simulate soil water content during the development of a maize (Zea mays L.) crop in the area of Balcarce, Buenos Aires province (Argentina). Data were collected during a field experiment at the Unidad Integrada Facultad de Ciencias Agrarias UNMdP-EEA INTA, during the 1998-99 growing season. Maize plot was split into three different irrigation treatments. In all plots the soil was covered in order to prevent soil evaporation. Plants were put under water stress period at different phenologic stage. Treatments were irrigated by sprinkling method to maintain an available water level for potential growing outside the stressed period. The plots were irrigated with 217.5 mm (R02R), 216.5 mm (R01R) and 129.1 mm (RR0) of water. Soil water content was measured at 2-5 days interval by the gravimetric method in the 0-0.1 m layer and by the neutron scattering method in layers between 0.1-1.0 m. Meteorological data were collected at the INTA Balcarce agro meteorological station, sited 300-m away from the plots. Also, aerial biomass of plants was sampled six times during growing season on some special phenological stages. Total green leaf area of the sample was estimated from green leaf area of a subsample measured with an area meter. Field studies were conducted on a Balcarce loam (illitic thermic loam petrocalcic Paleudoll) and 130 m above sea level. Balcarce has an annual average precipitation of 910 mm. Simulation was performed from 11/27/1998 to 03/01/1999. The seedtime was 10/16/1998. The proposed balance equation is: where i is a daily time index, Cw is the soil water content in the root zone, ra is the active root depth, Cwo is the soil water content in the zone without root, P is the rainfall, Ir is the irrigation, ´ra is the variation in the root depth, Pe is percolation, EET is the real crop transpiration. Rainfall and irrigation were measured variables. Daily root growth depth was represented by a sinusoidal time function, with a maximum depth value reached at the bloom stage. Percolation was estimated as an instantaneous drainage to the passive root depth of the exceeded water whenever the water content reached field capacity. Crop transpiration was determined using a simpler two-layer model, which calculate separately the evaporation (E) and transpiration (T). The model is based on a ¡¥parallel arrangement¡¦ of resistances, between the heat fluxes from the soil surface and the heat fluxes from leaves in the canopy. The fraction of total available water that the crop can extract from the root zone necessary to obtain potential growing conditions was considered above 65% during the sub-period V12-R3, and above 50 % in the rest of the cycle. Simulation results were compared with the observed values for the total soil water content of the depth studied. The model represents adequately daily variations of soil water content at the three plots. The values for determinant coefficient and mean square error are 0.946 and 0.0031 for R02R, 0.937 and 0.0020 for R01R and 0.985 and 0.0013 for RR0 of soil water content simulations.. |
| Area | MET |
| Type | Hydrological variability and modeling |
| doc Directory Content | access |
| source Directory Content | access |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URI | upn:PK9JS5:cptec.inpe.br/adm_conf/2005/10.28.12.18 |
| data URL | http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.28.12.18 |
| zipped data URL | http://urlib.net/zip/cptec.inpe.br/adm_conf/2005/10.28.12.18 |
| Language | en |
| Target File | 759-764.pdf |
| User Group | gassmann@at.fcen.uba.ar administrator |
| Visibility | shown |
| 5. Allied materials | |
| Host Collection | cptec.inpe.br/nobre/2005/06.02.21.14 cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Mark | 1 |
| Empty Fields | archivingpolicy archivist callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination documentstage doi edition group identifier isbn issn label lineage mirrorrepository nextedition nexthigherunit notes numberofvolumes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark serieseditor session shorttitle sponsor subject tertiarymark url versiontype volume |