Academic Journal

Regional Ombrian Curves: Design Rainfall Estimation for a Spatially Diverse Rainfall Regime

التفاصيل البيبلوغرافية
العنوان: Regional Ombrian Curves: Design Rainfall Estimation for a Spatially Diverse Rainfall Regime
المؤلفون: Theano Iliopoulou, Nikolaos Malamos, Demetris Koutsoyiannis
المصدر: Hydrology; Volume 9; Issue 5; Pages: 67
بيانات النشر: Multidisciplinary Digital Publishing Institute
سنة النشر: 2022
المجموعة: MDPI Open Access Publishing
مصطلحات موضوعية: ombrian curves, intensity–duration–frequency curves, rainfall extremes, regionalization, regional frequency analysis, spatial rainfall, design rainfall
جغرافية الموضوع: agris
الوصف: Ombrian curves, i.e., curves linking rainfall intensity to return period and time scale, are well-established engineering tools crucial to the design against stormwaters and floods. Though the at-site construction of such curves is considered a standard hydrological task, it is a rather challenging one when large regions are of interest. Regional modeling of ombrian curves is particularly complex due to the need to account for spatial dependence together with the increased variability of rainfall extremes in space. We develop a framework for the parsimonious modeling of the extreme rainfall properties at any point in a given area. This is achieved by assuming a common ombrian model structure, except for a spatially varying scale parameter which is itself modeled by a spatial smoothing model for the 24 h average annual rainfall maxima that employs elevation as an additional explanatory variable. The fitting is performed on the pooled all-stations data using an advanced estimation procedure (K-moments) that allows both for reliable high-order moment estimation and simultaneous handling of space-dependence bias. The methodology is applied in the Thessaly region, a 13,700 km2 water district of Greece characterized by varying topography and hydrometeorological properties.
نوع الوثيقة: text
وصف الملف: application/pdf
اللغة: English
Relation: Hydrological and Hydrodynamic Processes and Modelling; https://dx.doi.org/10.3390/hydrology9050067
DOI: 10.3390/hydrology9050067
الاتاحة: https://doi.org/10.3390/hydrology9050067
Rights: https://creativecommons.org/licenses/by/4.0/
رقم الانضمام: edsbas.136ECE48
قاعدة البيانات: BASE
الوصف
DOI:10.3390/hydrology9050067