文献类型： 会议论文

第一作者： S. Marlet

作者： S. Marlet ¹ ; B. Vincent; A. Vidal; S. Bouarfa; J. Wu; J.Yang; M.K. N'Diaye; M. Kuper; D. Zimmer;

作者机构： 1.Cirad, UMR Gestion de l'Eau, Acteurs et Usages, TA 40/01,34398 Montpellier cedex 5, France;Cemagref, UMR Gestion de l'Eau, Acteurs et Usages, France;Universite de Wuhan, Chine;Office du Niger, Mali;World Water Council, France

会议名称： 19th International Conference on Irrigation and Drainage vol.1B

主办单位：

页码： 474-476

摘要： Soil salinity is present in most of the large irrigation schemes over the world under the conjunctive effect of low quality irrigation water, aridity and lack of natural drainage of soils and aquifers. The trends in water management and soil salinity are assessed through studies in China, Mali, Pakistan and Uzbekistan. In China, the upper valley of the yellow river (Huinong irrigation district) is characterized by aridity, good water availability and over-irrigation. Despite large amount of drainage water returning to the river, excess in water supplied a resulted in shallow water table, accumulated in depression and in soil salinity. Remote sensing showed that downstream areas are more affected by salinity and displayed lowercropping intensity. The lower valley (Bojili Irrigation District) is faced with shortage of irrigation water. Drainage waterof low quality is re-used tc assist leaching thereby, cheating salinity hazard. In Mali (Office du Niger), the soils are affected by an alkalinization process due to irrigation water quality. A previous reclamation of irrigation and drainage systems has modified agricultural practices and water management, that also altered the trend of soil alkalinity. The improvement of surface drainage of flooded rice cropping season has decreased soil pH in clayey basins. Concomitantly the improvement of irrigation has allowed cropping during the dry season.

分类号： S274