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介绍了实用的临界雨量确定方法,以便为重要河段提供最准确的洪水预警信息。降雨量若超过临界雨量,受洪水威胁的河段会发生紧急状态,并启动预防和紧急系统进行预警。临界雨量主要根据降雨观测资料和流域水文响应特性确定。临界雨量指在一定时段内发生的降雨量,该雨量可以使所关注的重要河段产生峰值达到临界流量的洪水过程,并且基于典型情景(如不同的土壤含水量等),通过水文模拟分析后估算得出。按照可靠度分析方法,如采用准确率与误报率等指标对山洪预警中误报、错报等情况进行评估,提供了在意大利米格农河(mignone river)流域上开展案例研究的初步成果。
A practical method of critical rainfall is presented to provide the most accurate flood warning information for important river sections. If the amount of rainfall exceeds the critical rainfall, an emergency will occur at the river section threatened by the flood and the prevention and emergency system will be activated for early warning. Critical rainfall is mainly determined by rainfall observation data and basin hydrological response characteristics. Critical rainfall refers to the amount of rainfall that occurs over a period of time that produces floods that reach critical mass flow rates in important river sections of interest and is based on typical scenarios (eg, different soil moisture content, etc.) Estimated. According to the method of reliability analysis, such as the accuracy and false alarm rate, the assessment of false positives and false positives in the early warning of mountain torrents provides preliminary results of a case study on the Italian river mignone river .