References of "Tychon, Bernard"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailUse of remote sensing imagery for geotraceability in agriculture
Buffet, Dominique; Oger, Robert ULg; Tychon, Bernard ULg

Conference (2004, May 06)

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailAnalyse de la campagne agricole 2003 en terme de stress hydrique
De Longueville, Florence ULg; Horion, Stéphanie ULg; Tychon, Bernard ULg et al

in Bulletin de la Société Géographique de Liège (2004), 44

This article presents the evaluation of the crop water stress in 2003 using the Belgian Crop Growth Monitoring System (B-CGMS). The indicator used is the Relative Soil Moisture Index (RSMI), and is based ... [more ▼]

This article presents the evaluation of the crop water stress in 2003 using the Belgian Crop Growth Monitoring System (B-CGMS). The indicator used is the Relative Soil Moisture Index (RSMI), and is based on a calculation integrating soil moisture data. This index shows the differences between needed and effectively available soil water for different crop types. It is one of the outputs of the B-CGMS agrometeorological model. Based on a fixed threshold, days affected by water stress have been identified and computed for specific periods during which lack of soil water is likely to have dramatic impacts on crop production. The cumulative number of days affected by water stress indicator has then been integrated into a GIS to spatially represent the situation of winter wheat and maize during the 2003 crop season. Results suggest that only maize was affected by the water stress in northern and southern Belgium. In the latter area, the lack of water at key periods provoked a yield reduction ranging between 2 and 50%. [less ▲]

Detailed reference viewed: 119 (21 ULg)
Full Text
See detailL’enseignement en gestion des risques naturels.
Ozer, Pierre ULg; Tychon, Bernard ULg; Ozer, André ULg et al

in Demarée, Gaston; De Dapper, Morgan; Alexandre, Jean (Eds.) Tropical Climatology, Meteorology and Hydrology: Climate-related risk analysis and sustainable development in tropical areas. (2004)

Detailed reference viewed: 96 (19 ULg)
See detailMonitoring drought stress in north-eastern China by means of rainfall data and diachrone indices derived from Pathfinder AVHRR-imagery.
Ozer, Pierre ULg; Tychon, Bernard ULg; Eerens, Herman

in Smits, Paul; Bruzzone, Lorenzo (Eds.) Analysis of Multi-Temporal Remote Sensing Images (2004)

For climatic stress detection and monitoring in the Heilongjiang Province, north-eastem China, an indicator on the interannual vegetation state was extracted from the AVHRR Pathfinder image set (1981-2000 ... [more ▼]

For climatic stress detection and monitoring in the Heilongjiang Province, north-eastem China, an indicator on the interannual vegetation state was extracted from the AVHRR Pathfinder image set (1981-2000) and compared to the rainfall variations over the growing season (June to August). The results show that the vegetation status does not closely depend on rainfall variations in this region. Temperatures, which showed a rapid augmentation in the northern high latitudes since the early 1980s, seem to be a more crucial limiting factor for vegetation growth. Rapid land cover change and large natural disasters are also likely to impact the relationship between rainfall and vegetation. [less ▲]

Detailed reference viewed: 22 (7 ULg)
Full Text
Peer Reviewed
See detailEstimation of surface soil organic matter by means of hyperspectral data analysis.
Touré, Souleymane; Tychon, Bernard ULg

Conference (2003, November 19)

Data acquired from field campaign and hyperspectral airborne sensors were processed to determine the surface soil organic matter of an agricultural area located in Southern Belgium. The method adopted was ... [more ▼]

Data acquired from field campaign and hyperspectral airborne sensors were processed to determine the surface soil organic matter of an agricultural area located in Southern Belgium. The method adopted was based on a forward stepwise multiple regression analysis linking soil organic matter and hyperspectral data from two airborne sensors working in the visible and infrared domain. The results were validated successfully from an independent set of sampling points. It is concluded that the hyperspectral remote sensing approach is promising for soil organic matter prediction. Furthermore, this approach could even be improved if disturbance factors are removed. [less ▲]

Detailed reference viewed: 15 (2 ULg)
Full Text
See detailBulletin agrométéorologique - Septembre 2003
Tychon, Bernard ULg; Ozer, Pierre ULg; Eerens, H. et al

in Bulletin Agrométéorologique (2003)

Le mois de septembre a été caractérisé par des précipitations et des vitesses moyennes du vent faibles. Par contre, les températures et le rayonnement furent relativement élevés sur l’ensemble du pays ... [more ▼]

Le mois de septembre a été caractérisé par des précipitations et des vitesses moyennes du vent faibles. Par contre, les températures et le rayonnement furent relativement élevés sur l’ensemble du pays. Cette année, les rendements prévus pour les cultures de maï s fourrager et de betterave sucrière, sont respectivement équivalents et inférieurs à ceux observés en 2002. [less ▲]

Detailed reference viewed: 4 (0 ULg)
Full Text
See detailBulletin agrométéorologique - Août 2003
Tychon, Bernard ULg; De Longueville, Florence ULg; Ozer, Pierre ULg et al

in Bulletin Agrométéorologique (2003)

Detailed reference viewed: 7 (1 ULg)
Full Text
See detailEstimation of surface soil organic matter by means of hyperspectral data analysis.
Touré, Souleymane; Tychon, Bernard ULg

Conference (2003, September 04)

This presentation shows results from two different hyperspectral instruments for the assessment of soil organic content of agricultural soils in southern Belgium.

Detailed reference viewed: 5 (1 ULg)
Full Text
See detailBulletin agrométéorologique - Juillet 2003
Tychon, Bernard ULg; Ozer, Pierre ULg; Eerens, H. et al

in Bulletin Agrométéorologique (2003)

Detailed reference viewed: 5 (1 ULg)
Full Text
See detailBulletin agrométéorologique - Juin 2003
Tychon, Bernard ULg; Ozer, P.; Eerens, H. et al

in Bulletin Agrométéorologique (2003)

Detailed reference viewed: 3 (0 ULg)
Full Text
See detailBulletin météorologique - Mai 2003
Tychon, Bernard ULg; Ozer, Pierre ULg; Eerens, M. et al

in Bulletin Agrométéorologique (2003)

Detailed reference viewed: 1 (0 ULg)
Full Text
See detailGeographical traceabilitiy of food products.
Tychon, Bernard ULg; Oger, Robert ULg

Conference (2003, March)

Detailed reference viewed: 6 (1 ULg)
See detailBelgian and Chinese crop growth monitoring systems comparison, adaptation and improvement.
Tychon, Bernard ULg

Book published by Fondation Universitaire Luxembourgeoise (2003)

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailEtude des modifications environnementales à partir des données pluviométriques et NDVI de NOAA-AVHRR en Afrique de l’Ouest
Hountondji, Yvon ULg; Ozer, Pierre ULg; Tychon, Bernard ULg

in Schmitz, Serge; Meert, Henk (Eds.) Les Journées des Géographes Belges: Evaluer la capacité du milieu (2003)

Since the late 1960s, The Sahel of West Africa is affected by a long-term drought and increasing human pressure on the environment leading to desertification processes. The Normalised Difference ... [more ▼]

Since the late 1960s, The Sahel of West Africa is affected by a long-term drought and increasing human pressure on the environment leading to desertification processes. The Normalised Difference Vegetation Index (NDVI), calculated from satellite imagery, is a reliable index of the vegetation status as the vegetation response to rainfall is very strong in semiarid environments. This article presents the NDVI and rainfall evolution from 1981 to 1999 in nine locations along a north-south transect from north-western Niger to north-eastern Benin. These two parameters are then statistically analysed to identify breaks in the trends within the datasets. Over the 19 years analysed, it appears that five out of the nine locations have recorded a significant increase of rainfall, while only two presented a significant increase in NDVI. This dichotomy in observed trends may highlight the on-going slow processes of environmental degradation. [less ▲]

Detailed reference viewed: 85 (9 ULg)
Full Text
See detailSagriwatel : une vue d'ensemble sur les parcelles.
Tychon, Bernard ULg; Istasse, Alain

Article for general public (2003)

Detailed reference viewed: 9 (2 ULg)
Full Text
See detailMonitoring drought using rainfall based and AVHRR Pathfinder image set derived vegetation indices in north-eastern China.
Ozer, Pierre ULg; Eerens, Herman; Tychon, Bernard ULg

in Tychon, Bernard (Ed.) Belgian and Chinese Crop Growth Monitoring Systems: comparison, adaptation and improvement (2003)

Detailed reference viewed: 26 (8 ULg)
Full Text
Peer Reviewed
See detailDéverouiller le potentiel de l'eau en agriculture
Klohn, Wulf; Mollinga, Peter; Paranjape, K.J. Joy et Suhas et al

in Déverouiller le potentiel de l'eau en agriculture (2003)

A l’occasion du troisième Forum mondial de l’eau (WWF-3), qui se tient à Kyoto, au Japon, du 16 au 23 mars 2003, l’Organisation des Nations Unies pour l’alimentation et l’agriculture (FAO) présente un ... [more ▼]

A l’occasion du troisième Forum mondial de l’eau (WWF-3), qui se tient à Kyoto, au Japon, du 16 au 23 mars 2003, l’Organisation des Nations Unies pour l’alimentation et l’agriculture (FAO) présente un panorama des thèmes prioritaires que doivent aborder les responsables agricoles du monde entier en matière de mise en valeur des eaux en agriculture, et plus généralement de leurs répercussions sur la gestion des ressources en eau. La FAO a inscrit sa participation aux débats du WWF-3 de Kyoto sous le mot d’ordre «déverrouiller le potentiel de l’eau en agriculture». En effet, tous les renseignements statistiques confirment que l’agriculture est le secteur clé de la gestion de l’eau, pour le présent comme pour les décennies à venir. Pourtant, le secteur de la mise en valeur rurale des eaux se voit actuellement refuser un statut prioritaire dans les forums internationaux, par comparaison avec d’autres domaines concurrents. Il manque pour l’heure aux acteurs qui soutiennent ce secteur une stratégie valide et une présentation valorisante qui leur permettraient de maintenir l’attention sur ces questions. Des arguments nouveaux et puissants sont nécessaires pour remettre la mise en valeur rurale des eaux sur les rails. [less ▲]

Detailed reference viewed: 21 (1 ULg)
Full Text
See detailBelgian and Chinese Crop Growth Monitoring Systems: comparison, adaptation and improvement – An introduction
Tychon, Bernard ULg; Ozer, Pierre ULg; Pêcheur, Céline et al

in Tychon, Bernard (Ed.) Belgian and Chinese Crop Growth Monitoring Systems: comparison, adaptation and improvement (2003)

Detailed reference viewed: 72 (15 ULg)
Full Text
See detailAdaptation of the Heilongjiang Province Institute of Meteorological Sciences “Crop Growth Dynamic Model” to the Belgian conditions.
Weinzaepflen, Emmanuelle; Ozer, Pierre ULg; Tychon, Bernard ULg

in Tychon, Bernard (Ed.) Belgian and Chinese Crop Growth Monitoring Systems: comparison, adaptation and improvement (2003)

Detailed reference viewed: 32 (3 ULg)