Regional flood estimation methods

Rossi, Federico; Villani, Paolo

doi:10.1007/978-94-011-1098-3_8

Cited by 22 publications

(24 citation statements)

References 40 publications

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“…Figure 10 shows the relative changes in the estimated return period of a 20 year return period flood peak when neglecting the contribute of the forest cover, as function of the forest cover fraction S b scaled by the dimensionless number C L h A,T (t c )/V b,T , for a generic catchment with a dimensionless flood growth factor as defined for the Campania region (Rossi and Villani, 1992). For example, neglecting the effect of a 30 % (scaled) forest cover fraction can lead to underestimating the corresponding return period by almost 3 times, i.e.…”

Section: Discussionmentioning

confidence: 99%

“…Other indirect methods provide an estimate of the flood index based on a conceptual description of the hydrological response of the basin to intense rainfall events. Within the flood assessment procedures employed in Italy, an indirect estimation method largely applied is based on a conceptual model structured according to the well-known rational formula (Rossi and Villani, 1992). Other conceptual approaches have been also proposed, based on an analytical derivation of the probability distribution of floods (e.g.…”

Section: F Preti Et Al: Forest Cover Influence On Regional Flood Frmentioning

confidence: 99%

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Forest cover influence on regional flood frequency assessment in Mediterranean catchments

Preti

Forzieri

Chirico

2011

Hydrol. Earth Syst. Sci.

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Abstract. The paper aims at evaluating to what extent the forest cover can explain the component of runoff coefficient as defined in a regional flood frequency analysis based on the application of the rational formula coupled with a regional model of the annual maximum rainfall depths. The analysis is addressed to evaluate the component of the runoff coefficient which cannot be captured by the catchment lithology alone. Data mining is performed on 75 catchments distributed from South to Central Italy. Cluster and correlation structure analyses are conducted for distinguishing forest cover effects within catchments characterized by hydromorphological similarities. We propose to improve the prediction of the runoff coefficient by a linear regression model, exploiting the ratio of the forest cover to the catchment critical rainfall depth as dependent variable. The proposed regression enables a significant bias correction of the runoff coefficient, particularly for those small mountainous catchments, characterised by larger forest cover fraction and lower critical rainfall depth.

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Section: Discussionmentioning

confidence: 99%

Section: F Preti Et Al: Forest Cover Influence On Regional Flood Frmentioning

confidence: 99%

Forest cover influence on regional flood frequency assessment in Mediterranean catchments

Preti

Forzieri

Chirico

2011

Hydrol. Earth Syst. Sci.

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“…Data used for Fig. 1 can be found in Wenzel (1982), Iida (2004), Rossi and Villani (1994), Brutsaert (2005), Elsebaie (2012), Chang et al (2015), Rasel and Hossain (2015), Van de Vyver (2015) and Damé et al (2016). Data used for Fig.…”

Section: Concluding Remarks and Outlookmentioning

confidence: 99%

“…Examples of intensity-duration-frequency curves for a 10-year return period (1-9) and curve of the maximum observed precipitation (10). Location and source: 1 -Najran region, Saudi Arabia (Elsebaie, 2012); 2 -Uccle, Belgium (Van de Vyver, 2015); 3 -Naples, Italy (Rossi and Villani, 1994); 4 -Los Angeles, California (Wenzel, 1982); 5 -Pelotas, Brazil (Damé et al, 2016); 6 -New York (Wenzel, 1982); 7 -Hamada, Japan (Iida, 2004); 8 -Selangor, Malaysia (Chang et al, 2015); 9 -Sylhet, Bangladesh (Rasel and Hossain, 2015); 10 -greatest known observed point rainfall (Brutsaert, 2005).…”

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confidence: 99%

Invited perspectives: Hydrological perspectives on precipitation intensity-duration thresholds for landslide initiation: proposing hydro-meteorological thresholds

Bogaard

Greco

2018

Nat. Hazards Earth Syst. Sci.

200

173

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Abstract. Many shallow landslides and debris flows are precipitation initiated. Therefore, regional landslide hazard assessment is often based on empirically derived precipitation intensity-duration (ID) thresholds and landslide inventories. Generally, two features of precipitation events are plotted and labeled with (shallow) landslide occurrence or nonoccurrence. Hereafter, a separation line or zone is drawn, mostly in logarithmic space. The practical background of ID is that often only meteorological information is available when analyzing (non-)occurrence of shallow landslides and, at the same time, it could be that precipitation information is a good proxy for both meteorological trigger and hydrological cause. Although applied in many case studies, this approach suffers from many false positives as well as limited physical process understanding. Some first steps towards a more hydrologically based approach have been proposed in the past, but these efforts received limited follow-up.Therefore, the objective of our paper is to (a) critically analyze the concept of precipitation ID thresholds for shallow landslides and debris flows from a hydro-meteorological point of view and (b) propose a trigger-cause conceptual framework for lumped regional hydro-meteorological hazard assessment based on published examples and associated discussion. We discuss the ID thresholds in relation to return periods of precipitation, soil physics, and slope and catchment water balance. With this paper, we aim to contribute to the development of a stronger conceptual model for regional landslide hazard assessment based on physical process understanding and empirical data.

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“…Besides this, since the years '80s and '90s in Southern Italy regional analysis for flood prediction and flood frequency analysis has been applied, using methods based on the index flood approach and regional growth curves on homogeneous areas (e.g. Rossi and Villani, 1992). Today, this kind of approach still represents the most robust methodology for flood prediction in ungauged basins but it shows two main strong limitations.…”

Section: Introductionmentioning

confidence: 99%

Regional analysis of runoff thresholds behaviour in Southern Italy based on theoretically derived distributions

et al. 2011

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Abstract. The analysis of runoff thresholds and, more in general, the identification of main mechanisms of runoff generation controlling the flood frequency distribution is investigated, by means of theoretically derived flood frequency distributions, in the framework of regional analysis. Two nested theoretically-derived distributions are fitted to annual maximum flood series recorded in several basins of Southern Italy. Results are exploited in order to investigate heterogeneities and homogeneities and to obtain useful information for improving the available methods for regional analysis of flood frequency.

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Regional flood estimation methods

Cited by 22 publications

References 40 publications

Forest cover influence on regional flood frequency assessment in Mediterranean catchments

Forest cover influence on regional flood frequency assessment in Mediterranean catchments

Invited perspectives: Hydrological perspectives on precipitation intensity-duration thresholds for landslide initiation: proposing hydro-meteorological thresholds

Regional analysis of runoff thresholds behaviour in Southern Italy based on theoretically derived distributions

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