000164077 001__ 164077 000164077 005__ 20251121161351.0 000164077 0247_ $$2doi$$a10.3390/hydrology12090231 000164077 0248_ $$2sideral$$a146206 000164077 037__ $$aART-2025-146206 000164077 041__ $$aeng 000164077 100__ $$aRusso, Beniamino 000164077 245__ $$aImpact of Grated Inlet Clogging on Urban Pluvial Flooding 000164077 260__ $$c2025 000164077 5060_ $$aAccess copy available to the general public$$fUnrestricted 000164077 5203_ $$aThis study aims to analyse the effect of partially clogged inlets on the behaviour of urban drainage systems at the city scale, particularly regarding intercepted volumes and flood depths. The main challenges were to represent the inlet network in detail at a rather large scale and to avoid the effect of sewer network surcharging on the draining capacity of inlets. This goal has been achieved through a 1D/2D coupled hydraulic model of the whole urban drainage system in La Almunia de Doña Godina (Zaragoza, Spain). The model focuses on the interaction between grated drain inlets and the sewer network under partial clogging conditions. The model is fed with data obtained on field surveys. These surveys identified 948 inlets, classified into 43 types based on geometry and grouped into 7 categories for modelling purposes. Clogging patterns were derived from field observations or estimated using progressive clogging trends. The hydrological model combines a semi-distributed approach for micro-catchments (buildings and courtyards) and a distributed “rain-on-grid” approach for public spaces (streets, squares). The model assesses the impact of inlet clogging on network performance and surface flooding during four rainfall scenarios. Results include inlet interception volumes, flooded surface areas, and flow hydrographs intercepted by single inlets. Specifically, the reduction in intercepted volume ranged from approximately 7% under a mild inlet clogging condition to nearly 50% under severe clogging conditions. Also, the model results show the significant influence of the 2D mesh detail on flood depths. For instance, a mesh with high resolution and break lines representing streets curbs showed a 38% increase in urban areas with flood depths above 1 cm compared to a scenario with a lower-resolution 2D mesh and no curbs. The findings highlight how inlet clogging significantly affects the efficiency of urban drainage systems and increases the surface flood hazard. Further novelties of this work are the extent of the analysis (city scale) and the approach to improve the 2D mesh to assess flood depth. 000164077 536__ $$9info:eu-repo/grantAgreement/ES/AEI/TED2021-132098B-C22 000164077 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es 000164077 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000164077 700__ $$aBeiró, Viviane 000164077 700__ $$0(orcid)0000-0002-5585-2126$$aLopez-Julian, Pedro Luis$$uUniversidad de Zaragoza 000164077 700__ $$0(orcid)0000-0003-2591-1540$$aAcero, Alejandro 000164077 7102_ $$12000$$2427$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Externa 000164077 773__ $$g12, 9 (2025), 231 [17 pp.]$$tHydrology$$x2306-5338 000164077 8564_ $$s5352049$$uhttps://zaguan.unizar.es/record/164077/files/texto_completo.pdf$$yVersión publicada 000164077 8564_ $$s2624004$$uhttps://zaguan.unizar.es/record/164077/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000164077 909CO $$ooai:zaguan.unizar.es:164077$$particulos$$pdriver 000164077 951__ $$a2025-11-21-14:26:01 000164077 980__ $$aARTICLE