Abdul aziz ahmed comps (1 risultati)

First edition, first printing, consolidating hydrological data on Yemeni geography, information sources, climate, monitoring networks, and surface- and groundwater, with a particular focus on evapotranspiration and flash flows. An institutional search locates only seven copies in Europe and the US. The Yemen Arab Republic formed the General Department of Hydrogeology (GDR) in 1978, and the Yemeni-Dutch Water Resources Assessment Yemen (WRAY) programme was launched four years later. WRAY investigated the water resources while building a public database, and its fourth phase began in 1990 to ensure the GDR's self-reliance and consolidate earlier findings. The study focuses on western areas such as Tihama, Al Jauf, and Marib, while the east is largely limited to the Wadi Hadhramaut. It looks at ancient water systems, such as the old Marib Dam, the collapse of which is noted in the Koran. Also shown is spate irrigation illustrated by Van der Gun's map of Wadi Surdud. Ghayls, open canals capturing groundwater, are identified as future study potential. Modern projects are assessed, including the new Marib Dam and irrigation project, and the increasing challenges of groundwater depletion are examined. Folio. With 6 colour folding maps, and colour geological cross-section, illustrations in the text. Original illustrated wrappers, front wrapper lettered in white. Some rubbing of extremities, soiling of rear wrapper end edges of text block, internally clean. A very good copy. …