Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:" Environmental factors influencing streamwater composition on sandstone (Vosges Mountains)" | 369 Ann. For. Sci. 63 2006 369-376 INRA EDP Sciences 2006 DOI forest 2006017 Original article Environmental factors influencing streamwater composition on sandstone Vosges Mountains Theodora NEDELTCHEVAa Christian PlEDALLUb Jean-Claude GÉGOUTb Jean-Pierre BOUDOTc Nicolas ANGELIa Etienne DAMBRINEa a INRA Centre de Nancy Champenoux 54280 Nancy France b École Nationale du Génie Rural des Eaux et des Forets ENGREF 14 rue Girardet - CS 4216 54042 Nancy Cedex France c CNRS LIMOS UMR 7137 Université Henri Poincare Faculte des Sciences Nancy France Received 9 June 2005 accepted 29 November 2005 Abstract - The influence of sandstone composition precipitation vegetation and relief on streamwater composition at base flow was studied in 95 forested catchments located in the sandstone part of the Vosges Mountains . France . Catchments lie on four main types of sandstone. Information was acquired for each catchment using a geographic information system GIS and spatially distributed databases. Sulphate concentration is mainly negatively correlated to the annual rainfall and positively to the relative area covered by conifers in the catchment. Nitrate is positively correlated to altitude. Sodium Cl and Si concentrations are strongly inter-correlated and negatively related to the annual precipitation and the relative area of the conglomerate layer in the catchment. Calcium Mg ANC Acid Neutralising Capacity and pH are negatively correlated to precipitation and positively correlated to the relative area of the sandstone layer containing dolomitic nodules. This study emphasizes the role of annual rainfall amounts in controlling stream chemistry at base flow. streamwater acidification spatial analysis Vosges sandstone Résumé - Facteurs environnementaux influenẹant la composition chimique des eaux sur substrats gréseux dans les Vosges. L influence de la composition chimique des grès des precipitations de la vegetation et du relief sur la composition chimique des ruisseaux en
