Cover -- Front Matter -- Preface -- Contents -- Executive Summary -- Panel Report -- 1 Conceptual Models of Flow and Transport in the Fractured Vadose Zone -- Technical Papers -- 2 Development of the Conceptual Model of Unsaturated Zone Hydrology at Yucca Mountain, Nevada -- 3 Conceptual Model of Vadose-Zone Transport in Fractured Weathered Shales -- 4 Evaluation of Conceptual and Quantitative Models of Fluid Flow and Chemical Transport in Fractured Media -- 5 Uniform and Preferential Flow Mechanisms in the Vadose Zone -- 6 Modeling Macropore Flow in Soils: Field Validation and Use for Management Purposes -- 7 Free-Surface Films -- 8 What Do Drops Do? Surface Wetting and Network Geometry Effects on Vadose-Zone Fracture Flow -- 9 Investigating Flow and Transport in the Fractured Vadose Zone Using Environmental Tracers -- 10 Lessons from Field Studies at the Apache Leap Research Site in Arizona -- 11 Parameterization and Upscaling in Modeling Flow and Transport in the Unsaturated Zone of Yucca Mountain -- Appendixes -- Appendix A Workshop Attendees -- Appendix B Invited Presentations -- Appendix C Panel Biographies -- COLOR PLATES.