locationsseem more proper to represent the disaster-causing potential, and at least three days are required to satisfy preliminary duration. For regional scales, transient event identification approach (Ren et al. 2013) is used to trace multi-day processes moving from location to location; quasi-stationary identification scheme (Chen and Zhai 2013) is used to guarantee stationary front related persistent heavy precipitation, whose major amount pours into a highly concentrated area. The latter one tends to trigger severe floods during a few days. a general framework for defining heavy precipitation is proposed. Recommendation for standard characterization of heavy precipitation To quantitatively reflect a heavy precipitation event, the definition of heavy precipitation should be complemented by characterization with the following 4 metrics: Magnitude: it is computed based on an index or a set of indices measuring the precipitation total on various time scales to measure the intensity of the event. Duration:it is computed by the number of isolated or consecutive time unitthe precipitation satisfying the extreme criteria. Severity: is a measure which integrates two aspects of the event. Its magnitude and its persistence. Extent:describes the area impacted by the heavy precipitation event.
locationsseem more proper to represent the disaster-causing potential, and at least three days are required to satisfy preliminary duration. For regional scales, transient event identification approach (Ren et al. 2013) is used to trace multi-day processes moving from location to location; quasi-stationary identification scheme (Chen and Zhai 2013) is used to guarantee stationary front related persistent heavy precipitation, whose major amount pours into a highly concentrated area. The latter one tends to trigger severe floods during a few days. a general framework for defining heavy precipitation is proposed. Recommendation for standard characterization of heavy precipitation To quantitatively reflect a heavy precipitation event, the definition of heavy precipitation should be complemented by characterization with the following 4 metrics: Magnitude: it is computed based on an index or a set of indices measuring the precipitation total on various time scales to measure the intensity of the event. Duration:it is computed by the number of isolated or consecutive time unitthe precipitation satisfying the extreme criteria. Severity: is a measure which integrates two aspects of the event. Its magnitude and its persistence. Extent:describes the area impacted by the heavy precipitation event.
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