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Wageningen University (2009)

Detecting and monitoring vegetation water stress using remote sensing tools in Saratov region, Russia

Beets, W.

Titre : Detecting and monitoring vegetation water stress using remote sensing tools in Saratov region, Russia

Auteur : Beets, W.

Université de soutenance  : Wageningen University

Grade : Master of Science (MS) 2009

Résumé
This study is carried out within the DESIRE project, an EU project that aims to reduce land degradation and desertification in fragile agricultural areas. This specific study aimed to develop a new simple methodology to detect crop water stress in a dryland area in Southwest Russia. In this area irrigation is necessary to be able to grow crops, but over-application of irrigation water can cause solution of salts in the subsoil. Subsequently, a rising groundwater table due to irrigation can lead to transportation of these salts to the active root zone, causing crop stress and ultimately crop starvation. If crop waters stress is known, the ideal amount of water application can be determined. Current ways of measuring crop water stress are too expensive and complicated to carry out in this area, so the need for a simple methodology is urgent. Known crop water stress measurements were carried out on two Alfalfa fields, using thermal infrared and plant physiological measurements. These results are compared with a newly developed methodology making use of visible light remote sensing strategies. It appears that the newly developed methodology might provide a valid and easy way to determine crop water stress on point and field scale, with the possibility to spatially expand this strategy using airplane and satellite images.

Mots clés : crops / water stress / land degradation / vegetation / monitoring / remote sensing / russia

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Page publiée le 27 janvier 2015, mise à jour le 12 octobre 2018