References of "Tychon, Bernard"
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See detailSPOT 4 - Vegetation potentialities in food early warning systems and famine risk reduction in the Sahel.
Ozer, P.; Tychon, Bernard ULg; Toure, S.

in Goossens, Rudi; De Vliegher, Beata M. (Eds.) Proceedings of the 1st workshop of the EARSel Special Interest Group on Remote sensing for developing countries. (2001)

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See detailAide à la délimitation de zones de calamités.
Dehem, D.; Tychon, Bernard ULg; Oger, R. et al

Conference (2000, May 31)

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See detailThe Belgian crop growth modelling system (B-CGMS). Contribution of remote sensing.
Eerens, H.; Tychon, Bernard ULg; Dehem, Didier et al

Conference (2000, May 31)

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See detailGroundwater pollution in an agricultural catchment on sandstone : evaluation of water and nitrogen losses from soils.
Lecomte, Marielle; Salvia, Merce; Iffly, Jean-François et al

Conference (2000)

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See detailSuivi de la campagne agricole sahélienne 1998 avec le nouveau senseur basse résolution végétation du satellite spot-4 : analyse comparative avec le senseur NOAA-AVHRR
Tychon, Bernard ULg; Ozer, Pierre ULg; Touré, Souleymane

in Colloque international sur les techniques de l'information spatiale et de l'épidémiologie (2000)

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See detailUse of medium-resolution imagery in the Belgian crop growth monitoring system (B-CGMS).
Eerens, Herman; Wouters, Katy; Dehem, Didier et al

in Saint, Gilbert (Ed.) Proceedings of Vegetation 2000 : 2 years of operation to prepare the future, Lake Maggiore - Italy - 3-6 April 2000 (2000)

The Belgian Crop Growth Monitoring System (B-CGMS) uses the 1km²-resolution imagery of NOAA-AVHRR and SPOT-VEGETATION to improve its yield estimates. The pre-processed images are converted to fAPAR and ... [more ▼]

The Belgian Crop Growth Monitoring System (B-CGMS) uses the 1km²-resolution imagery of NOAA-AVHRR and SPOT-VEGETATION to improve its yield estimates. The pre-processed images are converted to fAPAR and combined with meteorological data (irradiance, temperature) to daily growth values by means of the Monteith approach. The regional means of the cumulative monthly growth numbers are calibrated against official harvest statistics by means of crop-specific neural networks. The quality of the yield estimates varies with the importance of the crop: the R²-values for winter wheat, sugar-beets and fodder maize are respectively 60%, 48% and 36%. The final yield forecasts will be better, because the B-CGMS integrates the image-based yield estimates with the assessments of the agromet-model and of the technological trend function. The technique of linear unmixing seems promising but in its actual state it is too unpredictable to be included in an operational scheme. [less ▲]

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See detailVEGETATION potentialities in food early warning systems in the Sahelian region.
Tychon, Bernard ULg; Ozer, Pierre ULg; Touré, Souleymane

in SAINT, Gilbert (Ed.) VEGETATION 2000 - 2 years of operation to prepare the future (2000)

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See detailUse of reference site measurements and remote sensing data to estimate evapotranspiration over the Khan catchment (Ivory Coast)
Terfai, L.; Toure, Souleymane; Tychon, Bernard ULg

in Proceedings of The 2000 Eumetsat meteorological satellite data users' conference (2000)

evapotranspiration experts often need to make decisions relating to the precision of the results of various existing methods such as traditional and satellite methods. For these reasons a decision support ... [more ▼]

evapotranspiration experts often need to make decisions relating to the precision of the results of various existing methods such as traditional and satellite methods. For these reasons a decision support system (EVA) is develped in order to provide evapotranspiration experts with a tool for evaluating the results of a variety of existing methods for estimating potential and real evapotranspiration by using in situ data and remote sensing data. The EVA provides a variety of models that can be used either in combination or as stand-alone tools to generate information for agricultural planning and management. The paper focuses on the concepts of the EVA software. A case study also will be presented. [less ▲]

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See detailA web-based mapping application to link. A crop modelling system (B-CGMS) and a GIS database.
Buffet, D.; Oger, Robert ULg; Dehem, D. et al

in Donatelli, Marcello; Stockle, Claudio; Villalobos, Francisco (Eds.) et al International symposium on modelling cropping systems Lleida, 21-23 june, 1999, Book of proceedings (1999, September)

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See detailAdaptation of the European crop growth monitoring system to the Belgian conditions.
Buffet, D.; Dehem, Didier; Wouters, K. et al

Poster (1999, April)

The aim of the Belgian Crop Growth Monitoring System (B-CGMS) is the elaboration of an integrated information system predicting reliable, timely and objective estimates of crop yields and monitoring ... [more ▼]

The aim of the Belgian Crop Growth Monitoring System (B-CGMS) is the elaboration of an integrated information system predicting reliable, timely and objective estimates of crop yields and monitoring calamity sites at regional scales. Seven major crops are concerned by the project : winter wheat, winter barley, fodder maize, winter rape seed, potatoes, sugar beet and permanent meadow. The main tasks in the adaptation of the European model come down to the completion and the improvement of the databases to specify the local conditions and particularities of Belgium, to modify the scale of the forecasting system, to incorporate satellite information and to develop a web-based mapping interface. [less ▲]

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See detailUtilisation du SIG pour la définition des zones agro-écologiques du Togo
Lawson-Body, L. A.; Tychon, Bernard ULg; Compère, R.

Conference (1999)

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See detailAdaptation of the European crop growth monitoring system to the Belgian conditions.
Tychon, Bernard ULg; Buffet, D.; Dehem, Didier et al

in Donatelli, Marcello; Stockle, Claudio; Villalobos, Francisco (Eds.) et al International symposium on modelling cropping systems Lleida, 21-23 june, 1999, Book of proceedings (1999)

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See detailUse of mineralization kinetics to estimate the agricultural value of a compost incorporated into a vineyard in Luxembourg.
Weinzaepflen, Emmanuelle; Tychon, Bernard ULg; Godden, B.

in Warman, P. R.; Taylor, B. R. (Eds.) Proceedings of the International composting symposium (ICS'99) (1999)

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See detailPresentation of Fondation Universitaire Luxembourgeoise activities in Remote sensing
Tychon, Bernard ULg

in Catalogue of presentations Earth observation for environmental monitoring Information Day (1999)

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See detailWater and nitrogen transfer study through soils of a small agricultural water catchment
Tychon, Bernard ULg; Vander Borght, Paul ULg; De Backer, Louis W.

in Water Science & Technology (1999), 39(12), 69-76

Water and nitrogen movements in a small watershed (32ha) located in the Belgian Lorraine (south-eastern Belgium) were monitored intensively between 1988 and 1991 to investigate at a daily time step the ... [more ▼]

Water and nitrogen movements in a small watershed (32ha) located in the Belgian Lorraine (south-eastern Belgium) were monitored intensively between 1988 and 1991 to investigate at a daily time step the possibility of predicting water discharge rates and nitrate concentrations in a spring if one knows the surface agricultural practices in the catchment area. The watershed was equipped with instruments to monitor the various meteorological, pedological, agronomic and geohydrological parameters assumed to explain most of the behaviour of water and nitrogen fluxes. They were recorded at various levels, i.e., the surface, vadose zone, saturated zone, and watershed outlet. Field observations were made to cross-check fluxes at each level. This information was then used in simulation models (SOIL and SOILN) to describe the movement of water and nitrogen solutes in the vadose zone and with original programming that describes their movements in the groundwater down to the outlet. These models present many parameters, the most sensitive of which were subjected to Monte Carlo Analysis which confirmed the robustness of the approach. The performance of the comprehensive model is quite satisfactory, with a 10% error in nitrogen fluxes over a three-year period. It shows the limits of such an approach despite the particularly intense degree of observation. [less ▲]

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See detailL'enseignement en agrométéorologie pour les ressortissants des pays en voie de développement
Tonnard, Victor; Tychon, Bernard ULg

in Demarée, G.; Alexandre, J.; De Dapper, M. (Eds.) Proceedings of the International conference on "Tropical climatology, meteorology and hydrology. In memoriam Franz Bultot" Brussels, 22-24 May, 1996 (1998)

Depuis 1979, la Fondation Universitaire Luxembourgeoise (Arlon, Belgique) organise une formation en agrométéorologie. Cette formation s'adresse aux agronomes et météorologues de niveau universitaire des ... [more ▼]

Depuis 1979, la Fondation Universitaire Luxembourgeoise (Arlon, Belgique) organise une formation en agrométéorologie. Cette formation s'adresse aux agronomes et météorologues de niveau universitaire des pays en développement. Elle dure douze mois et est subsidiée par l'A.G.C.D., via l'O.M.M. qui propose les candidats. Les auteurs, responsables de cet enseignement, présentent la formation, en retracent l'évolution et en soulignent les originalités. [less ▲]

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See detailEffects of management of nitrogen fertilizers and conversion of cropping soils in fallow on nitrate pollution studie of the springs of roodt (Nospelt, Luxembourg).
Weinzaepflen, Emmanuelle; Vander Borght, Paul ULg; Tychon, Bernard ULg

in Conference proceedings 3rd international conference on diffuse pollution (1998)

A management of nitrogen fertilizers and a conversion of cropping soil into fallow were developed to reduce the nitrate pollution of spring exploit to supply with drinking water the southwestern ... [more ▼]

A management of nitrogen fertilizers and a conversion of cropping soil into fallow were developed to reduce the nitrate pollution of spring exploit to supply with drinking water the southwestern Luxembourg. The methodological approach was based on in situ observations and includes a study of nitrates lost by leaching (measure of nitrogen profiles in experimental fields, use of vertical soil water cup ceramics) and study of the water quality of springs (measurements of nitrate concentrations). Since October 1995, the nitrate concentrations of polluted springs have been reduced by 25 mg l-1 due to the fallow and the reduction of nitrogen fertilizers. [less ▲]

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