Assessing Climate Change Impacts on Combined Sewer Overflows: A Modelling Perspective DOI Open Access
Παναγιώτα Γαλιατσάτου, Iraklis Nikoletos, Dimitrios Malamataris

et al.

Climate, Journal Year: 2025, Volume and Issue: 13(5), P. 82 - 82

Published: April 22, 2025

The study examines the impacts of climate change on operation and capacity combined sewer network in historic center Thessaloniki, Greece. Rainfall data from three high-resolution Regional Climate Models (RCMs), namely (a) Cosmo model (CCLM), (b) regional atmospheric (RACMO) (c) (REMO), MED-CORDEX initiative with future estimations based Representative Concentration Pathway (RCP) 4.5, are first corrected for bias existing measurements area. Intensity–duration–frequency (IDF) curves then constructed using a temporal downscaling approach scaling Generalized Extreme Value (GEV) distribution to derive relationships between daily sub-daily precipitation. Projected rainfall events associated various return periods subsequently developed utilized as input parameters hydrologic–hydraulic model. simulation results each period compared those current climate, projections RCMs ranked according their impact overflow volumes. In short term (2020–2060), CCLM REMO project decrease CSO volumes conditions, while RACMO predicts an increase, highlighting uncertainties short-term projections. long (2060–2100), all models indicate rise volumes, showing most significant suggesting escalating pressure urban drainage systems due more intense events. Based these findings, it is essential adopt mitigation strategies, such nature-based solutions, reduce peak flows within alleviate risk flooding.

Language: Английский

Assessing Climate Change Impacts on Combined Sewer Overflows: A Modelling Perspective DOI Open Access
Παναγιώτα Γαλιατσάτου, Iraklis Nikoletos, Dimitrios Malamataris

et al.

Climate, Journal Year: 2025, Volume and Issue: 13(5), P. 82 - 82

Published: April 22, 2025

The study examines the impacts of climate change on operation and capacity combined sewer network in historic center Thessaloniki, Greece. Rainfall data from three high-resolution Regional Climate Models (RCMs), namely (a) Cosmo model (CCLM), (b) regional atmospheric (RACMO) (c) (REMO), MED-CORDEX initiative with future estimations based Representative Concentration Pathway (RCP) 4.5, are first corrected for bias existing measurements area. Intensity–duration–frequency (IDF) curves then constructed using a temporal downscaling approach scaling Generalized Extreme Value (GEV) distribution to derive relationships between daily sub-daily precipitation. Projected rainfall events associated various return periods subsequently developed utilized as input parameters hydrologic–hydraulic model. simulation results each period compared those current climate, projections RCMs ranked according their impact overflow volumes. In short term (2020–2060), CCLM REMO project decrease CSO volumes conditions, while RACMO predicts an increase, highlighting uncertainties short-term projections. long (2060–2100), all models indicate rise volumes, showing most significant suggesting escalating pressure urban drainage systems due more intense events. Based these findings, it is essential adopt mitigation strategies, such nature-based solutions, reduce peak flows within alleviate risk flooding.

Language: Английский

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