""River Resource Management in the GRAND CANYON""; ""Copyright""; ""Preface""; ""Contents""; ""Executive Summary""; ""WORK OF THE NRC COMMITTEE""; ""OBJECTIVES AND DESIGN OF THE GCES""; ""RESULTS OF THE GCES""; ""Operations of Glen Canyon Dam""; ""Sediment and Hydrology""; ""Biological Resources""; ""Recreation""; ""Hydropower Economics""; ""Cultural Resources""; ""Institutional Influences on the GCES""; ""Nonuse Values""; ""ACHIEVEMENTS OF GCES""; ""LIST OF NRC REPORTS""; ""1 Introduction and Background""; ""ROLE OF THE NRC""; ""REFERENCES""
""2 Scope and Organization of the Glen Canyon Environmental Studies""""INTRODUCTION""; ""SCOPE AS DEFINED BY MANAGEMENT OPTIONS, RESOURCES, AND THE ECOSYSTEM CONCEPT""; ""Management Options""; ""Resources""; ""The Ecosystem Perspective""; ""OTHER INFLUENCES ON THE SCOPE OF GCES""; ""Administrative Policy""; ""Law and Politics""; ""ORGANIZATION OF THE STUDY GROUP""; ""CONCLUSIONS""; ""REFERENCES""; ""3 Historical Context for Long-Term Management of Glen Canyon Dam""; ""HISTORY OF GRAND CANYON NATIONAL PARK""; ""Introduction""; ""Predesignation History""; ""Designation as a Park""
""Role of the Colorado River in the Park: Conduit Between Upper and Lower Basins""""FUTURE BASIS FOR MANAGEMENT OF GRAND CANYON RESOURCES""; ""Intergenerational Equity""; ""Simulated Naturalness""; ""REFERENCES""; ""4 Operation of Glen Canyon Dam""; ""INTRODUCTION""; ""HYDROLOGY THROUGH THE GRAND CANYON""; ""Hydrology Prior to Construction of Glen Canyon Dam""; ""Hydrology Following Closure of the Dam""; ""Tributary Inflows Below the Dam""; ""Hydrological Regimes During the GCES Research Periods""; ""Travel Time Through Grand Canyon""; ""OPERATING RULES FOR GLEN CANYON DAM""
""Seasonal and Annual Operations""""Formal Description of Operating Rules""; ""Monthly and Annual Releases""; ""Daily and Hourly Operations""; ""Daily Operations""; ""Experience with Interim Flows and Exception Criteria""; ""EIS Preferred Alternative""; ""Beach/Habitat-Building Flows""; ""Operational Constraints on Experimental Floods""; ""WATER SUPPLY ABOVE THE DAM""; ""Water Balance In Lake Powell""; ""Upper-Basin Depletions""; ""Evaporation Loss""; ""Storage in Lake Powell""; ""Flood Control""; ""Current Rules Related to Floods""; ""Flood Control Changes Recommended in EIS""
""Reregulating Dam""""Summary""; ""RECOMMENDATIONS""; ""REFERENCES""; ""5 Sediment and Geomorphology""; ""WHY SEDIMENT AND GEOMORPHOLOGY ARE IMPORTANT""; ""Amount of Sediment Is Not a Problem in the Grand Canyon""; ""Management of Sediment""; ""Rapids""; ""Sand as Substrate""; ""SEDIMENT STUDIES OF GCES PHASE I""; ""Bureau of Reclamation Model""; ""Early Assumptions Concerning Sediment Movement""; ""Coordination and Communication""; ""Leadership for GCES""; ""NRC Committee Recommendations After GCES I""; ""WHAT IS NEEDED CONCERNING SEDIMENT AND GEOMORPHOLOGY""; ""Sediment Budget""
