文章基本信息

标题：Salinisation et hydromorphie dans les oasis tunisiennes
本地全文：下载
作者：Amor Mtimet ; Mohamed Hachicha
期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：1995
卷号：6
期号：4
页码：319-324
出版社：John Libbey Eurotext
摘要：Authors Amor Mtimet , Mohamed Hachicha Direction des sols, ministère de l’Agriculture, 30, rue Alain-Savary, 1002, Tunis, Tunisie Page(s) : 319-24 Published in: 1995 Subjected to continually increasing demographic pressure, Tunisian oases are spreading out and using greater quantifies of deep groundwater. Because of the region’s hydromorphy and aridity, salinisation is increasingly common, although tempered by the gypsum-saline soil type. Drain maintenance undergoes regular delays, resulting in poor water outflow. Hydromorphy is primarily observed in the non-controlled sprawl outside the former boundaries. Since poor water management is at the root of hydro-pedological problems, saving water is one of the most important aspects of oasis rehabilitation projects. The salt dynamics of oasis soils depend on the spatial variability of plots, land use and the oasis as a whole, resulting in a twofold situation: 1) slow dynamics, resulting from ground and irrigation water movements, and 2) fast dynamics, due to exceptional climatic phenomena. Due to the quantifies of water drained, re-using it would seem a valid idea. The quantity and qualify of water are dependent on a system characterised by groundwater predominating in winter and leached water in summer. However, given the maximum flow in winter and very limited flow in summer, their use is limited.