Wet bulbs from the subsurface drip irrigation with water supply and treated sewage effluent

The use of treated sewage effluent (TSE) combined with the subsurface drip irrigation (SDI) method in agriculture can decrease the costs of agricultural production, in attempts to fertigate crops more efficiently. In this study it was compared the dimensions of the wet bulb formed by the application of TSE and municipal water supply (MWS) in an Oxisoil. We have evaluated the effect of water quality and discharge between drippers used in sugarcane crop. Three trenches were opened and 21 three-rod TDR probes were setup in a mesh and a dripper was buried at 0.30 m, for each constant discharge of 1.0 L h-1and 1.6 L h-1. Comparing results from different wetted soil profiles it was observed that the vertical and horizontal dimensions of the wet bulb are similar for both MWS and TSE, being peculiars according to the discharges used and volume applied. Regardless the water quality, an increase of 60% in discharge decreased the deepest infiltration.

Das Königreich Böhmen verfertiget von Joh. George Schreibern in Leipzig.

Koordinaattiasteikko reunoissa: E[29°50']30°-35°10', N51°10'-48°30'.

Variational Ensemble Kalman Filtering in Hydrology

The current thesis manuscript studies the suitability of a recent data assimilation method, the Variational Ensemble Kalman Filter (VEnKF), to real-life fluid dynamic problems in hydrology. VEnKF combines a variational formulation of the data assimilation problem based on minimizing an energy functional with an Ensemble Kalman filter approximation to the Hessian matrix that also serves as an approximation to the inverse of the error covariance matrix. One of the significant features of VEnKF is the very frequent re-sampling of the ensemble: resampling is done at every observation step. This unusual feature is further exacerbated by observation interpolation that is seen beneficial for numerical stability. In this case the ensemble is resampled every time step of the numerical model. VEnKF is implemented in several configurations to data from a real laboratory-scale dam break problem modelled with the shallow water equations. It is also tried in a two-layer Quasi- Geostrophic atmospheric flow problem. In both cases VEnKF proves to be an efficient and accurate data assimilation method that renders the analysis more realistic than the numerical model alone. It also proves to be robust against filter instability by its adaptive nature.

La Petite revue de littérature et d'art / Alphonse Demare, directeur-administrateur ; George Bonnamour, rédacteur en chef ; Gaston Moreilhon, secrétaire de la rédaction

Variante(s) de titre : La Petite revue

La Petite revue de littérature et d'art / Alphonse Demare, directeur-administrateur ; George Bonnamour, rédacteur en chef ; Gaston Moreilhon, secrétaire de la rédaction

1888/01 (A1,N1)-1888/02 (A1,N2).

Grève de cheminots anglais, M. [le ministre du Travail George Henry] Roberts et sir David Shackleton [secrétaire permanent du ministère du Travail] quittant Downing Street : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 56199

Dodd [George], Winslow [Charles] [joueurs de tennis participant au championnat du monde à Saint-Cloud] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59419

Dodd [George], Winslow [Charles] [joueurs de tennis participant au championnat du monde à Saint-Cloud] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59424

M. Lloyd George à la conférence [interalliée] de Boulogne-sur-Mer [21 juin 1920, revue des troupes] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59796

Le général [George Francis] Milne, commandant des forces anglaises dans la Mer Noire, joue au tennis à Constantinople : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59803

Le général [George Francis] Milne [commandant des forces anglaises dans la Mer Noire, joue au tennis à Constantinople] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59804

Le général [George Francis] Milne et [le] général [Henry Hughes] Wilson à un match de football à Constantinople : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59815

[Charles George] Dandrow [lanceur de poids] (C.N. New York) : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59328