Research on reservoir sedimentation in recent years has been aimed mainly at water resources projects in developing countries. These countries, especially in Africa, often have to cope with long droughts, flash floods and severe erosion problems. Large reservoir capacities are required to capture water provided by flash floods so as to ensure the supply of water in periods of drought. The problem arising however is that these floods, due to their tremendous stream power, carry enormous volumes of sediment which, due to the size of reservoirs, are virtually deposited in toto in the reservoir basin, leading to fast deterioration of a costly investment. Accurate forecasting of reservoir behaviour is therefore of the utmost importance.This book fills a gap in current literature by providing in one volume comprehensive coverage of techniques required to practically investigate the effects sediment deposition in reservoirs has on the viability of water resources projects. Current techniques for practically estimating sediment yield from catchments, estimating the volume of sediment expected to deposit in reservoirs, predicting sediment distribution and calculating scour downstream of reservoirs are evaluated and presented. The liberal use of diagrams and graphs to explain the various techniques enhances understanding and makes practical application simple. A major feature of the book is the application of stream power theory to explain the process of reservoir sedimentation and to develop four new methods for predicting sediment distribution in reservoirs.The book is primarily directed at practising engineers involved in the planning and design of water resources projects and at post-graduate students interested in this field of study.

Despite the mechanisms of reservoir sedimentation being well known for a long time, sustainable and preventive measures are rarely taken into consideration in the design of new reservoirs. To avoid operational problems of powerhouses, sedimentation is often treated for existing reservoirs with measures which are efficient only for a limited time.Th

Reservoir Sedimentation: Assessment and Environmental Controls appraises the issues of sedimentation in reservoirs and discusses measures that can be employed for the effective management of sediment to prolong the operational life of reservoirs. It provides information for professional consultants and policymakers to enable them to manage dams in the best possible way, in order to ensure their sustainability as well as the sustainability of water resources in general. It examines the effects of anthropogenic intervention and management of sediment in dams and reservoirs, as water resources become more sensitive and the demand for clean water continues to increase. Features: Examines the issue of sedimentation in dams and reservoirs and presents water management strategies to alleviate environmental issues Presents methods to help ensure the environmental sustainability of dams and reservoirs, as well as the sustainability of water resources- with consideration of climate change and increased demand Illustrates the spatial distribution of sedimentation characteristics for several dams using geographic information systems (GIS) Explains the relationships between loss in capacity and catchment characteristics Examines regional variation in sediment yield, defines geomorphic regions on the basis of similar hydrometeorology, physiography, geology, and vegetation affecting reservoirs

Introductory technical guidance for professional engineers interested in reservoir sedimentation. Here is what is discussed: 1. INTRODUCTION, 2. BASIC OBJECTIVES, 3. PLANNING AND DESIGN OBJECTIVES, 4. FIELD FACILITIES, 5. TOPOGRAPHIC MAPS OF RESERVOIR AREA, 6. CLASSIFICATION OF SEDIMENT RANGES, 7. NUMBERING SEDIMENT RANGES, 8. LOCATING AND SPACING RANGES, 9. MODIFICATIONS TO EXISTING RANGE NETWORKS, 10. RANGE MONUMENTS AND SUPPLEMENTAL MARKERS, 11. PERMANENT MONUMENTS, 12. SEMI-PERMANENT RANGE MARKERS, 13. TEMPORARY MARKERS, 14. INSPECTION AND MAINTENANCE OF FIELD FACILITIES, 15. REMOVAL OF VEGETATION ALONG RANGE LINES, 16. BANK LINE SURVEY DATA, 17. SEDIMENT SURVEY GRIDS, 18. COMPONENTS OF RESERVOIR SEDIMENTATION SURVEYS, 19. FIELD MEASUREMENTS, 20. LABORATORY ANALYSES, 21. PROCESSING FIELD DATA, 22. ANALYSIS OF FIELD DATA, 23. INITIAL SURVEYS, 24. USE OF ECHO-SOUNDERS IN INITIAL SURVEYS, 25. PRESERVATION OF SURVEY RECORDS, 26. RESURVEYS, 27. FIELD SURVEY METHODS, 28. ALTERNATIVE METHODS, 29. SEDIMENT SPECIFIC WEIGHT AND GRADATION OF DEPOSITS.