Table of Contents

Conclusions and Recommendations.- The Interrelationship between Irrigation, Drainage and the Environment.- Environmental Benefits of Reducing Collector-Drain Runoff and Ways to Improve Irrigation Water Quality in the Rivers of the Aral Sea Basin.- Planning for Drainage Development in the Aral Sea Basin.- Impressions and Findings of a Study Tour to Karakalpakia in Central Asia.- Drainage Development in the Arid Zones of Central Asia.- Choice of Envelope Materials for the Rehabilitation of the Drainage Network in Uzbekistan.- The Construction and Effectiveness of Combined Drainage Systems.- The Contribution of Horizontal Subsurface Drainage to Solving the Aral Sea Economic and Environmental Problem.- Flow through Wetlands for Controlling Water Quality in Discharges from Irrigated Areas.- Comparing Surface and Subsurface Drainage in Rice Irrigation Systems of Kazakhstan.- Environmental and Economic Benefit of Subsurface Horizontal Drainage Construction.- Improving Drainage Water Quality by Constructing Wetland Ecosystems in the Catchment Area of the Amu Darya, Aral Sea Region.- Irrigation Systems, Water Use Efficiency and Environmental Impacts.- Measures to Increase the Efficiency of Irrigated Lands in Kyrghyzstan.- The Use of Decision Support Systems in Water Management.- Conjunctive Water Management for the Aral Sea Basin.- Drainage Problems and Solutions in the San Joaquin Valley of California, U.S.A..- The Use of Specific Environmental Publications for Local Capacity Building for Irrigation and Drainage Projects within the Aral Sea Basin.- Irrigation and the Environment of the Aral Sea Basin; an Annotated Bibliography.