Coupling hydrological and irrigation schedule models for the management of surface and groundwater resources in Khorezm, Uzbekistan [Elektronische Ressource] / von Usman Khalid Awan

Landwirtschaft _______________________________________________________________ Coupling hydrological and irrigation schedule models for the management of surface and groundwater resources in Khorezm, Uzbekistan Inaugural-Dissertation zur Erlangung des Grades Doktor der Agrarwissenschaften (Dr. agr.) der Hohen Landwirtschaftlichen Fakultät der Rheinischen Friedrich-Wilhelms-Universität zu Bonn vorgelegt am 24.02.2010 von Usman Khalid Awan aus Punjab, Pakistan 1. Referent: PD Dr. Christopher Martius 2. Referent: Prof. Dr. -Ing. Janos J. Bogardi 3. Referent: PD Dr. Jürgen Schellberg Tag der Promotion: 28.05.2010 Erscheinungsjahr: 2010 Diese Dissertation ist auf dem Hochschulschriftenserver der ULB Bonn http://hss.ulb.uni-bonn.de/diss_online elektronisch publiziert For my family whose prayers helped me to achieve this milestone After the demise of prophet Musa’s (AS) mother, when He visited Koh-e-Tur (the mountain) and stumbled and was about to fall, he heard a sound from heaven, saying, “Musa come carefully, the lips that would supplicate for you are silent today.   ABSTRACT The irrigated agriculture in the Khorezm region of Uzbekistan is characterized by huge water withdrawals from the Amu Darya River.