Search results for "Flood myth"
showing 10 items of 96 documents
Uncertainty in urban flood damage assessment due to urban drainage modelling and depth-damage curve estimation
2010
Due to the increased occurrence of flooding events in urban areas, many procedures for flood damage quantification have been defined in recent decades. The lack of large databases in most cases is overcome by combining the output of urban drainage models and damage curves linking flooding to expected damage. The application of advanced hydraulic models as diagnostic, design and decision-making support tools has become a standard practice in hydraulic research and application. Flooding damage functions are usually evaluated by a priori estimation of potential damage (based on the value of exposed goods) or by interpolating real damage data (recorded during historical flooding events). Hydrau…
Estimation of urban structural flood damages: the case study of Palermo
2000
Abstract The estimation of flood damage is a fundamental step in the economic analysis of a flood control projects. In particular, frequency–damage functions, derived from the hydrologic, hydraulic and damage relationships, are one of the fundamental pieces of information upon which expenditure decisions are based. The aim of this study has been to develop an empirical frequency–damage relationship, obtained by means of detailed local studies, which could be a judgement tool for flood mitigation measures in strongly urbanised drainage areas. Monuments and other estates having a cultural or artistic significance have been specifically taken into account. The analysis has been carried out for…
Unsteady State Water Level Analysis for Discharge Hydrograph Estimation in Rivers with Torrential Regime: The Case Study of the February 2016 Flood E…
2017
Discharge hydrograph estimation during floods, in rivers with torrential regime, is often based on the use of rating curves extrapolated from very low stage-discharge measurements. To get a more reliable estimation, a reverse flow routing problem is solved using water level data measured in two gauged stations several kilometers from each other. Validation of the previous analysis carried out on the flood event of February 2016 at the Europa Bridge and Castiglione Scalo sections of the Crati River (Cosenza, Italy) is based on the use of 'soft' discharge measurement data and the comparison of the water level data computed in the downstream gauged section by three different hydraulic models w…
Economic Adaptation to Risky Environment in the Late Middle Ages: The Case of the "Accrues" of the Doubs in Chaussin (Jura, France) from c. 1370 to c…
2017
Located along the meanders of the Doubs, the people of Chaussin had to deal with the particular impact of the river on their environment. Due to the impact of the Little Ice Age on water levels in the area, the Doubs sometimes had special floods, which frequently changed its course from the end of the fourteenth century. As a result, some lands were absorbed, and others emerged, which were called the “accrues.” From 1377 the first observation of lost lands appears in the accounts of the castellan, in a petition from landowners who did not want to pay taxes on these fields. More than twenty years later, in the first decade of the fifteenth century, the duke of Burgundy, facing the same situa…
Flood Frequency Analysis for Sicily, Italy
2006
In this paper a regional flood frequency analysis based on the two-component extreme value TCEV distribution is developed using flood data recorded in Sicily. The hierarchical approach, characterized by three investigation levels for estimating the parameters of the theoretical distribution, is discussed first. The highest level of homogeneity hypothesis with regard to the skewness coefficient was verified by using a Monte Carlo technique and taking account of the separation effect proposed by Matalas et al. in 1975. This analysis also showed 1 the inability of the generalized extreme value model to reproduce the empirical cumulative distribution function CDF of the skewness coefficients, a…
Estimation of flood design hydrographs using bivariate analysis (copula) and distributed hydrological modelling
2014
Abstract. In this paper a procedure to derive Flood Design Hydrographs (FDH) using a bivariate representation of rainfall forcing (rainfall duration and intensity) using copulas, which describe and model the correlation between these two variables independently of the marginal laws involved, coupled with a distributed rainfall-runoff model is presented. Rainfall-runoff modelling for estimating the hydrological response at the outlet of a watershed used a conceptual fully distributed procedure based on the soil conservation service – curve number method as excess rainfall model and a distributed unit hydrograph with climatic dependencies for the flow routing. Travel time computation, based o…
Municipal Climate Change Adaptation GOVERNANCE in Latvia: ApproachING Cross-sectorial and Multi–instrumental understanding
2021
Climate change adaptation being one of today’s main challenges on global agenda do affect people worldwide, but even though most decisions regarding climate change governance are made at the international or national level, the implementation of these decisions in most cases takes place at the local level. Municipal climate change adaptation research project in Latvia was carried out with special emphases on main stakeholder understanding, preparedness and communication factors using several complementary research methods – case study research in Salacgriva coastal municipality, sociological surveys with both Salacgriva town households / inhabitants (home visits / questionnaires) and also n…
Analysis of Hydrological and Landslide Hazards at Castellammare Del Golfo (Northern Sicily)
2014
Catastrophic floods or mass movements occur all too often owing to small streams overflowing their banks or to slope instabilities whose evolution has a more or less tragic impact on people and property; these events are the consequence of a poor understanding of the dynamics of geomorphological processes and of the laws governing them. This paper is focused on the case study of Castellammare del Golfo, a town in the province of Trapani. The study analysed the geological risk due to the geomorphology of the area and to the urban sprawl that it has experienced in the past decades. Geomorphological processes have a strategic role to play in spatial planning and management instruments and in t…
Flood proofing measures cost-efficiency analysis for hydraulic risk mitigation in an urbanized riverine area.
2020
<div> <div> <div> <p><strong>Flood proofing measures cost-efficiency analysis for hydraulic risk mitigation in an urbanized riverine area</strong></p> <p>Ugo Ventimiglia <sup>2</sup>, Angela Candela <sup>1,</sup> Giuseppe Tito Aronica <sup>2</sup></p> <p><sup>1 </sup>Department of Engineering, University of Palermo, Palermo, Italy</p> <p><sup>2 </sup>Department of Engineerin…
Estudio sedimentológico de los depósitos de inundación en la Ribera del Xúqer (Valencia), en octubre de1982
2013
As a result of the sedimentological study of a series of deposits corresponding to the exceptional flood in the Xuquer River in October 1982, we analyze the behaviour of fluvial dynamics. The sedimentary response enables us lo perceive certain differences between the deposits analyzed, bUI these do not completely adjust to the genetic patterns considered in the classic Geomorphology as the producers ofthe traits ofvertical growth generated during floods.