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IVES 9 IVES Conference Series 9 Viticultural zoning using spatial analysis: characterizing terroirs over the Southern part of the Côtes-du-Rhône appellation (France)

Viticultural zoning using spatial analysis: characterizing terroirs over the Southern part of the Côtes-du-Rhône appellation (France)

Abstract

Les approches du terroir en tant qu’entité géographique (zonages) connaissent un développement accru récent en lien avec l’essor des SIG. Les méthodes, les objectifs et les critères utilisés varient considérablement selon les études. La délimitation de l’unité de terroir dite «fonctionnelle» se distingue de celles issues de diverses méthodes de cartographie informatisée, parmi lesquelles la méthode dite de «zonage des terroirs par l’analyse spatiale» objet de cette communication. Fondé sur l’analyse géomorphologique et pédologique du milieu physique en unités de pédopaysage, puis sur des regroupements de ces unités à l’aide de classifications statistiques, le zonage des terroirs par l’analyse spatiale repose sur l’interprétation de données de terrain et de photographies aériennes, ainsi que sur des traitements numériques d’images satellitales. Il a été mis en œuvre pour le vignoble AOC des Côtes-du-Rhône méridionales, couvrant 210 800 ha de territoires communaux, dont 60 000 plantés en vigne. Au moins 60 % des unités de terroir disposant de données de maturité 1982-1998 du Grenache et de la Syrah sont respectivement validées au moyen de l’analyse fréquentielle de ces données.

Spatial approaches on terroir as a geographical entity (“zoning”) are being developed, together with the steady rising of GIS data handling. Studies greatly differ in methods, objectives and the selected criteria. The delineation of so-called “functional” units has to be distinguished from varied digital mapping methods, such as the so-called “zoning of terroirs based on spatial analysis”, which is presented in this paper. Relying on the soil and landform analysis of the geographic space into soil-landscape units, which are clustered using statistical classifications, such zoning uses ground observations, aerial photograph examination, and also digital processing of satellite images. It was carried out in the Southern Côtes-du-Rhône Appelation vineyard, over 210 800 hectares, 60 000 of which planted with vines. At least 60 % of those of the modelled terroir units having harvest data are validated as for their viticultural response, across successive harvests of Grenache or Shiraz grapes in quality-clusters over the 1982-1998 vintages.

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Publication date: February 15, 2022

Issue: Terroir 2002

Type: Article

Authors

E.VAUDOUR (1), M.C. GIRARD (1), F. FABRE (2)

(1) Institut National Agronomique Paris-Grignon (INA-PG) -UFR AGER/DMOS -Centre de Grignon BP01 78850 Thiverval-Grignon-France
(2) Syndicat des Vignerons des Côtes-du-Rhône-Maison des Vins -6, rue des Trois Faucons -84000 Avignon -France

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Keywords

zonage viticole, terroir, analyse spatiale géomorpho-pédologique
viticultural zoning, terroir, soil and landform spatial analysis

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IVES Conference Series | Terroir 2002

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