Analysis of rainfall time structures on a scale of hours

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F18%3A00490951" target="_blank" >RIV/68378289:_____/18:00490951 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/18:10380822

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.atmosres.2018.04.015" target="_blank" >http://dx.doi.org/10.1016/j.atmosres.2018.04.015</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.atmosres.2018.04.015" target="_blank" >10.1016/j.atmosres.2018.04.015</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of rainfall time structures on a scale of hours

Popis výsledku v původním jazyce

The paper is motivated by the enormous variability of short-term rainfall time structures which need to be discretized into several typical variants and explained from the viewpoint of rainfall types producing them. We present six variants of the time structure of 6-h rainfalls in Czechia, distinguished by a novel methodology for designing synthetic hyetographs. Reference 6-h rainfall episodes were extracted from radar-derived precipitation time series with a time resolution of 10 min, adjusted by daily data from rain gauges. The variants were distinguished by three indexes that quantify the precipitation concentration within time steps from one to six hours. The episodes with steady precipitation intensity during the entire episode are mainly stratiform or possibly mixed and frequently take much longer than six hours because of circulation patterns producing them: central and northeastern cyclonic types are most represented. All other variants of episodes frequently occur when a trough is situated above Central Europe. Episodes with steady intensity lasting about three hours are still mainly stratiform or mixed while two variants represented by ´two-humped´ hyetographs are usually mixed or convective. Two variants of most concentrated episodes are mainly convective or possibly mixed: they are characterized by enhanced frequency of southwestern and eastern cyclonic types. Future research on cluster frequencies among maximum precipitation episodes in various regions will enable the improvement of design hydrographs of small streams where runoff is basically influenced by the rainfall time structure.

Název v anglickém jazyce

Analysis of rainfall time structures on a scale of hours

Popis výsledku anglicky

The paper is motivated by the enormous variability of short-term rainfall time structures which need to be discretized into several typical variants and explained from the viewpoint of rainfall types producing them. We present six variants of the time structure of 6-h rainfalls in Czechia, distinguished by a novel methodology for designing synthetic hyetographs. Reference 6-h rainfall episodes were extracted from radar-derived precipitation time series with a time resolution of 10 min, adjusted by daily data from rain gauges. The variants were distinguished by three indexes that quantify the precipitation concentration within time steps from one to six hours. The episodes with steady precipitation intensity during the entire episode are mainly stratiform or possibly mixed and frequently take much longer than six hours because of circulation patterns producing them: central and northeastern cyclonic types are most represented. All other variants of episodes frequently occur when a trough is situated above Central Europe. Episodes with steady intensity lasting about three hours are still mainly stratiform or mixed while two variants represented by ´two-humped´ hyetographs are usually mixed or convective. Two variants of most concentrated episodes are mainly convective or possibly mixed: they are characterized by enhanced frequency of southwestern and eastern cyclonic types. Future research on cluster frequencies among maximum precipitation episodes in various regions will enable the improvement of design hydrographs of small streams where runoff is basically influenced by the rainfall time structure.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Atmospheric Research

ISSN

0169-8095

e-ISSN

—

Svazek periodika

211

Číslo periodika v rámci svazku

Oct 1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

38-51

Kód UT WoS článku

000436224300005

EID výsledku v databázi Scopus

2-s2.0-85047299258