Orographic Effects on Extreme Rainfall at Different Durations: A Case Study in Campania Region (Southern Italy)  

作　　者：Pierluigi Furcolo Anna Pelosi 

机构地区：[1]Department of Civil Engineering, University of Salerno, Fisciano (SA), Italy

出　　处：《Journal of Geoscience and Environment Protection》2018年第11期77-88,共12页地球科学和环境保护期刊（英文）

摘　　要：Long-term probabilistic prediction of extreme rainfall at the regional scale is a significant tool in the mitigation of hydro-geological disasters: it actually provides the starting point in the design of strategic hydraulic infrastructures and emergency plans. A crucial task of regional estimation of extreme rainfall is how to include the complex effects of orographic barriers in a mathematical model for Intensity-Duration-Frequency (IDF) curves. Here, an analysis of how orography can affect extreme rainfall at different durations is presented for three orographic systems that are very relevant for hydrological risk assessment in the Campania Region in Southern Italy. Then, we introduce a power law model to link the amplification factor to the duration, thus allowing a simple and effective enhancement of the IDF model in mountainous areas.Long-term probabilistic prediction of extreme rainfall at the regional scale is a significant tool in the mitigation of hydro-geological disasters: it actually provides the starting point in the design of strategic hydraulic infrastructures and emergency plans. A crucial task of regional estimation of extreme rainfall is how to include the complex effects of orographic barriers in a mathematical model for Intensity-Duration-Frequency (IDF) curves. Here, an analysis of how orography can affect extreme rainfall at different durations is presented for three orographic systems that are very relevant for hydrological risk assessment in the Campania Region in Southern Italy. Then, we introduce a power law model to link the amplification factor to the duration, thus allowing a simple and effective enhancement of the IDF model in mountainous areas.

关 键 词：OROGRAPHY Extreme RAINFALL Regional Models Orographic AMPLIFICATION IDF CURVES 

分 类 号：P4[天文地球—大气科学及气象学]