Management scenarios for reducing waterlogging hazard in Valparaiso, Chile

Fernando Esteban Mardonez Meza () and Vladimir J. Alarcon ()
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Fernando Esteban Mardonez Meza: Universidad Diego Portales
Vladimir J. Alarcon: MSU Science and Technology Center

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2023, vol. 118, issue 2, No 27, 1463-1485

Abstract: Abstract Urban waterlogging occurs when precipitation events cause urban runoff to exceed the capacity of stormwater systems, causing water accumulation on the land surface. Valparaiso City is one of the main metropolitan centers in Chile. Rapid urban growth forced the city to invest substantial resources to upgrade its stormwater system. The most recent is the Argentina stormwater canal. However, soon after the stormwater canal was operational, solids (sandy clay, fine sand) washed-off from upland watersheds accumulated in the lower elevation sectors of the canal, close to the conduit outfall to Valparaiso Bay. This has degraded the water conveying capacity of the canal and increased waterlogging hazards if extreme storms and high tide events combine. This research explores management scenarios for reducing the hazard of waterlogging in the canal. Hydrological and in-stream hydrodynamic modeling is used to propose watershed management scenarios aimed to reduce flows and suspended solids wash-off. The impact of those scenarios for reducing waterlogging hazard is assessed.

Keywords: Hydrological modeling; HEC-HMS; Hydrodynamics; HEC-RAS; SWMM; Total suspended solids; Valparaiso; Chile; Waterlogging (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s11069-023-06068-w

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