American Journal of Civil Engineering
Volume 7, Issue 1, January 2019, Pages: 21-26
Received: Jan. 17, 2019;
Published: Apr. 28, 2019
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J. P. Wang, Civil Engineering, National Central University, Taoyuan, Taiwan, Republic of China
Yijie Wu, Civil Engineering, National Central University, Taoyuan, Taiwan, Republic of China
This paper presents a logistic model for predicting the occurrence probability of debris flows based on rainfall intensity and duration. The data from a total of 354 rainfall events were used to calibrate the model, among which 249 were triggering a debris flow while 105 were not. The model will be useful to the decision making of debris flow early warning in the future. That is, given the estimated occurrence probability = 70% subject to a combination of rainfall intensity and duration, there is a 30% probability that the early warning will be a false alarm. By contrast, if decision makers decide not to issue an early warning, then there is a 70% chance leading to a missed alarm. Subsequently, integrating the consequences of missed alarm and false alarm into the equation, the respective risks can be computed, based on which decision makers can make a more robust decision whether an early warning is needed or not by choosing the scenario with a lower risk.
J. P. Wang,
A Logistic Model Predicting Occurrence Probability of Debris Flow, American Journal of Civil Engineering.
Vol. 7, No. 1,
2019, pp. 21-26.
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