The Inter-Relationship Between Irrigation, Drainage and the Environment in the Aral Sea Basin: 2 (closed)) - Couverture souple

Couverture souple

ISBN 10 : 9401072906 ISBN 13 : 9789401072908

Editeur : Springer, 2011

Synopsis

The irrigated area in the Aral Sea basin totals about 7. 5 million hectare. Part of the water supplied to this area is consumed by the irrigated crop; the remainder of the supplied water drains to the groundwater basin, to downstream depressions, or back to the rivers. During its use, however, this drained part of the water accumulates salts and chemicals. The disposal of this polluted water causes a variety of (environmental) problems. If the percentage consumed water of the total water supply to an irrigated area (the so-called overall consumed ratio) can be increased, less water needs to be drained. This alleviates part of the related (environmental) problems. Further, if the overall consumed ratio for the above 7. 5 million hectare is improved, less water needs to be diverted from the rivers. Hence, more water can flow towards the Aral Sea. As mentioned above, part of the non-consumed irrigation water drains to the groundwater basin. Commonly, the natural discharge capacity of this basin is insufficient to handle this imported water. As a result, the groundwater table rises towards the land surface causing waterlogging. In (semi-)arid zones this waterlogging triggers a soil salinity problem resulting to a significant reduction in crop yields. The artificial increase of the discharge capacity, and lowering of the groundwater table, solves the soil salinity problem.

A propos du livre

Présentation de l'éditeur

The irrigated area in the Aral Sea basin totals about 7.5 million ha. Part of the water supplied to this area is consumed by the irrigated crops; the remainder drains into the groundwater basin, downstream depressions, or back into the rivers. But the water accumulates salts and chemicals during its period of use, causing environmental problems which this book discusses. The natural discharge capacity of the groundwater basin is inadequate to handle the unconsumed irrigation water, leading to a rise in the groundwater table and to waterlogging. In (semi-) arid zones, this waterlogging triggers a soil salinity problem, resulting in poorer crop yields. The problem is solved by artificially increasing the discharge capacity and lowering the groundwater table. Since the lands surrounding the Aral Sea have become independent republics, a number of missions have reported on the water-related environmental problems in the basin. Such reports have contributed to a plan of action for solving or alleviating some of the problems identified, high priority being accorded to improving the irrigation efficiency, artificial drainage, and the related environmental effects.

Détails de l'édition

• Éditeur: Springer
• Date d'édition: 2011
• Langue: anglais
• ISBN 10: 9401072906
• ISBN 13: 9789401072908
• Reliure: Broché
• Nombre de pages: 252
• Éditeur: Bos M.G.
• Coordonnées du fabricant: GPSR Kontakt; ProductSafety@springernature.com; ; Tiergartenstr. 17; Heidelberg; 69121; Allemagne