. Technical Report HL-93 -12 August 19 93 Prepared for Assistant Secretary of the Army (R&D) Washington, DC 20 31 5 Waterways Experiment Station Cataloging-in-Publication Data Berger,. analytic and flume results are compared with approaches for shock- capturing and shock detection. A trigger mechanism that turns on the capture schemes in the vicinity of shocks and the characteristic. Petrov-Galerkin formulation 14 Shock Capturing 20 Case 1: Analytic Shock Speed 24 Case 2: Dam Break 28 Case 3: 2-D Lateral Transition 40 Discussion 43 References 55 Preface This