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Flood Exposure Maps for Buzi-Pungwe-Save (BuPuSa) Transboundary River Basins
OpenLISEM is an open-source hydrological model suited for the simulation of floods, flash floods and erosion events. The following sections provide an overview of the results...OpenLISEM is an open-source hydrological model suited for the simulation of floods, flash floods and erosion events. The following sections provide an overview of the results from the OpenLISEM model used in the exposure mapping A 30x30m flood map (maximum flood height) for the BuPuSa region was developed for several points on the intensity-frequency-duration curve. This curve represents the extreme value analysis (EVA) for the rainfall across the BuPuSa area. Based on 50 years of historic rainfall data from TAMSAT the EVA is developed for a 1000 year period. From this different rainfall intensities area taken which are referred to at the return period. The statistical possibility of a certain rainfall intensity to happen once in X many years. Flood maps were developed for the following return periods: 1/2, 1/10, 1/50, 1/100 and 1/1000. In addition to 5 different return periods, two different scenarios were modeled. A short high intensity rainfall event that typically causes flash floods, and a longer term lower intensity rainfall event that typically causes fluvial (river) floods. These events were represented by respectively a 6h rainfall event and a 14 day rainfall event. As a result 10 different flood maps were developed.
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Indicateurs des Eaux Souterraines du TWAP pour les Petits États Insulaires...
Le visualiseur des PEID fournit des informations sur les eaux souterraines dans les Petits États Insulaires en Développement. Actuellement, le système contient principalement...Le visualiseur des PEID fournit des informations sur les eaux souterraines dans les Petits États Insulaires en Développement. Actuellement, le système contient principalement des données issues du Programme d'Évaluation des Eaux Transfrontalières (TWAP) sur 43 PEID. Ces données comprennent des indicateurs décrivant les dimensions hydrogéologiques, environnementales, socio-économiques et de gouvernance des systèmes d’eaux souterraines des PEID.
Les données ont été recueillies à partir d'enquêtes par questionnaire et d'une étude approfondie réalisée par l'Université Simon Fraser (Canada) et coordonnée par l'UNESCO-IHP. Les informations du système peuvent être explorées et analysées grâce à un visualiseur cartographique, particulièrement utile pour effectuer des analyses comparatives entre plusieurs PEID. De plus, des fiches d'information sur les PEID sont également disponibles, offrant des aperçus clairs pour chaque PEID. Des données supplémentaires seront collectées et intégrées au visualiseur des PEID au fur et à mesure de leur disponibilité.
Pour toute question ou commentaire sur les données et informations des PEID, veuillez consulter notre page de l’Espace Focal PEID (https://www.un-igrac.org/areas-expertise/small-island-developing-states-sids)
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Approaching climate and disasters in an age of uncertainty: case studies and...
This publication aims to bridge the gap between climate and disasters, in the face of the uncertainties that climate change poses to water managers and policymakers. Composed of...This publication aims to bridge the gap between climate and disasters, in the face of the uncertainties that climate change poses to water managers and policymakers. Composed of a compilation of worldwide case studies, it provides examples of innovative water management and climate risk assessment approaches. The publication also highlights the National Determined Contributions (NDCs) and National Adaptation Plans (NAPs) with the aim of identifying links between these high-level frameworks, DRR and water issues, and describing how the policy-practice linkages can be turned into action.