GD
G Di Baldassarre
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Panta Rhei 2013-2015
Global perspectives on hydrology, society and change
Journal article
(2016)
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H McMillan, A Montanari, G Di Baldassarre, Y. Huang, D Mazvimavi, M Rogger, B Sivakumar, Tatiana Bibikova, A Castellarin, Y Chen, DAvid Finger, A Gelfan, C Cudennec, David M. Hannah, AY Hoekstra, H Li, S Maskey, T Mathevet, Ana Mijic, Adrian Pedrozo Acuna, M.J. Polo, Victor Rosales, Paul Smith, Huub Savenije, A Viglione, V Srinivasan, E Toth, Ronald van Nooijen, Jun Xia, Heidi Kreibich, T Krueger, J Liu, Alfonso Mejia, A van Loon, H. Aksoy
In 2013, the International Association of Hydrological Sciences (lAHS) launched the hydrological decade 2013-2022 with the theme "Panta Rhei; Change in Hydrology and Society". The decade recognizes the urgency of hydrological research to understand and predict the interactions of society and water, to support sustainable water resource use under changing climatic and environmental conditions. This paper reports on the first Panta Rhei biennium 2013-2015, providing a comprehensive resource that describes the scope and direction of Panta Rhei. We bring together the knowledge of all the Panta Rhei working groups, to summarize the most pressing research questions and how the hydrological community is progressing towards those goals. We draw out interconnections between different strands of research, and reflect on the need to take a global view on hydrology in the current era of human impacts and environmental change. Finally, we look back to the six driving science questions identified at the outset of Panta Rhei, to quantify progress towards those aims.
...
In 2013, the International Association of Hydrological Sciences (lAHS) launched the hydrological decade 2013-2022 with the theme "Panta Rhei; Change in Hydrology and Society". The decade recognizes the urgency of hydrological research to understand and predict the interactions of society and water, to support sustainable water resource use under changing climatic and environmental conditions. This paper reports on the first Panta Rhei biennium 2013-2015, providing a comprehensive resource that describes the scope and direction of Panta Rhei. We bring together the knowledge of all the Panta Rhei working groups, to summarize the most pressing research questions and how the hydrological community is progressing towards those goals. We draw out interconnections between different strands of research, and reflect on the need to take a global view on hydrology in the current era of human impacts and environmental change. Finally, we look back to the six driving science questions identified at the outset of Panta Rhei, to quantify progress towards those aims.
Regional Versus Physically-Based Methods For Flood Inundation Modelling In Data Scarce Areas
An Application To The Blue Nile
One of the
main obstacles in mapping flood hazard in data scarce areas is the difficulty
in estimating the design flood, i.e. river discharge corresponding to a given
return period. This exercise can be carried out using regionalization
techniques, which are based on flood data of regions with similar
hydro-climatic conditions, or employing physically based model cascades. In
this context, we compared the flood extents maps derived for a river reach of
the Blue Nile following two alternative methods: i) regional envelope curve
(REC), whereby design floods (e.g. 1-in-20 and 1-in-100 year flood peaks) are
derived from African envelope curves and ii) physical model cascade (PMC),
whereby design floods are calculated from the physical model chain of the
European Centre for Medium-Range Weather Forecasts (ECMWF,). The two design
flood estimates are then used as input of a 2D hydraulic model LISFLOOD-FP and
the simulated flood extents are quantitatively evaluated by comparing to a
reference flood extent model, which uses design floods estimated from in situ
data. The results show the complexity in assessing flood hazard in data scarce
area as PMC largely overestimates the flood extent, while REC underestimates
it.
...
One of the
main obstacles in mapping flood hazard in data scarce areas is the difficulty
in estimating the design flood, i.e. river discharge corresponding to a given
return period. This exercise can be carried out using regionalization
techniques, which are based on flood data of regions with similar
hydro-climatic conditions, or employing physically based model cascades. In
this context, we compared the flood extents maps derived for a river reach of
the Blue Nile following two alternative methods: i) regional envelope curve
(REC), whereby design floods (e.g. 1-in-20 and 1-in-100 year flood peaks) are
derived from African envelope curves and ii) physical model cascade (PMC),
whereby design floods are calculated from the physical model chain of the
European Centre for Medium-Range Weather Forecasts (ECMWF,). The two design
flood estimates are then used as input of a 2D hydraulic model LISFLOOD-FP and
the simulated flood extents are quantitatively evaluated by comparing to a
reference flood extent model, which uses design floods estimated from in situ
data. The results show the complexity in assessing flood hazard in data scarce
area as PMC largely overestimates the flood extent, while REC underestimates
it.