Search results for "Hyetograph"

showing 4 items of 4 documents

Exploiting historical rainfall and landslide data in a spatial database for the derivation of critical rainfall thresholds

2017

Critical rainfall thresholds for landslides are powerful tools for preventing landslide hazard. The thresholds are commonly estimated empirically starting from rainfall events that triggered landslides in the past. The creation of the appropriate rainfall–landslide database is one of the main efforts in this approach. In fact, an accurate agreement between the landslide and rainfall information, in terms of location and timing, is essential in order to correctly estimate the rainfall–landslide relationships. A further issue is taking into account the average moisture conditions prior the triggering event, which reasonably may be crucial in determining the sufficient amount of precipitation.…

Antecedent rainfall condition010504 meteorology & atmospheric sciencesMeteorology0211 other engineering and technologiesSoil ScienceContext (language use)02 engineering and technologyRainfall–landslide database01 natural sciencesImage analysisEnvironmental ChemistryRainfall thresholds; Rainfall–landslide database; Image analysis; Antecedent rainfall conditions; Sicily; LithologyPrecipitationSicily0105 earth and related environmental sciencesEarth-Surface ProcessesWater Science and TechnologyEvent (probability theory)021110 strategic defence & security studiesGlobal and Planetary ChangeRainfall thresholdsSpatial databaseSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaAntecedent rainfall conditionsGeologyLandslideRainfall thresholdPollutionHazardRunoff modelLithologyHyetographImage analysiGeologyEnvironmental Earth Sciences
researchProduct

A PCA-based clustering algorithm for the identification of stratiform and convective precipitation at the event scale: an application to the sub-hour…

2021

AbstractUnderstanding the structure of precipitation and its separation into stratiform and convective components is still today one of the important and interesting challenges for the scientific community. Despite this interest and the advances made in this field, the classification of rainfall into convective and stratiform components is still today not trivial. This study applies a novel criterion based on a clustering approach to analyze a high temporal resolution precipitation dataset collected for the period 2002–2018 over the Sicily (Italy). Starting from the rainfall events obtained from this dataset, the developed methodology makes it possible to classify the rainfall events into f…

ConvectionEnvironmental Engineering010504 meteorology & atmospheric sciencesFunctional data analysis01 natural sciencesExtreme rainfall Convective and stratiform precipitation Functional data analysis PCA-based clustering analysis010104 statistics & probabilityIdentification (information)HyetographClimatologyTemporal resolutionEnvironmental ChemistryPrecipitation0101 mathematicsSafety Risk Reliability and QualityCluster analysisGeology0105 earth and related environmental sciencesGeneral Environmental ScienceWater Science and TechnologyConvective precipitation
researchProduct

Derivation of Rainfall Thresholds for Flash Flood Warning in a Sicilian Basin Using a Hydrological Model

2016

Abstract The damages caused by flash floods are among the most onerous in terms of loss of lives and damage to properties. Derivation of rainfall threshold is one of the approaches commonly used for the development of flash flood warning systems. Specifically, rainfall threshold is the rainfall amount that, for a given basin area and duration, is enough to cause flooding and, therefore, it indicates the maximal sustainable rainfall for a basin. The aim of this paper is deriving flash flood-rainfall thresholds for a Sicilian basin (Italy) throughout a deterministic approach. The conceptual hydrological model TOPDM was used to estimate the amount of rainfall that, for given duration, hydrolog…

HydrologyWarning systemMeteorologySettore ICAR/02 - Costruzioni Idrauliche E Marittime E Idrologia0208 environmental biotechnologyFlooding (psychology)hydrological modelrainfall threshold02 engineering and technologyGeneral MedicineStructural basinrainfall thresholds020801 environmental engineeringRunoff modelhydrological model.Engineering (all)Hyetographflash flood; hydrological model; rainfall thresholds; Sicily; Engineering (all)Flash floodEnvironmental scienceflash floodWater contentSicilyIntensity (heat transfer)Engineering(all)Procedia Engineering
researchProduct

Practical thresholds to distinguish erosive and rill rainfall events

2019

Abstract In this paper, 1017 rainfall events from 2008 to 2017 are used to identify the rainfall threshold that produces upland erosion at the Masse (central Italy) and Sparacia (southern Italy) experimental stations. The rainfall events are classified into three classes: non-erosive, interrill-only and rill. The threshold values for separating as correctly as possible the erosive rains (case I) and the rill rains (case II) are derived solely from the hyetograph. Each threshold value is obtained by imposing that the long-term erosivity of the events above the threshold is equal to the long-term erosivity of all erosive events (case I) or only rill events (case II). The performances of selec…

Water erosionThreshold limit valueRainfall patternSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliRUSLEUSLETruncation (statistics)Interrill; Rainfall erosivity; Rainfall hyetograph; Rainfall pattern; Rainfall thresholds; RUSLE; Soil erosion; Soil loss; USLERainfall hyetographWater Science and TechnologyHydrologySoil logeographyRainfall thresholdsgeography.geographical_feature_categoryInterrillRainfall erosivityRainfall thresholdSoil lossRillHyetographSoil erosionErosionEnvironmental scienceScale (map)Predictive modellingJournal of Hydrology
researchProduct