Author(s): Xudong Fu; Hongbo Ma; Fan Liu; Guangqian Wang
Linked Author(s):
Keywords: Quake lake; Earthquake; Breach formation; Flow hydrograph; Simulation; Erosion; Dam failure
Abstract: Breach development process of the Tangjiashan Quake Lake triggered by the Wenchuan Earthquake in China was simulated. Predictions from two physically based models and one parametric model were compared for examining model applicability and reliability in such extreme circumstances. It was shown that simplified physically based models with few calibration parameters could be used in an easy and timesaving manner but might be disabled due to the complicated nature of quake lakes. The linear assumption of breach development involved in the parametric model was challenged by the non-linear nature of bed incision. High sensitivity of the parametric model to breach formation time as well as breach depth would reduce its reliability and hamper their applications to quake lakes in natural circumstances.
Year: 2009