Variation in the hydrological response within the Quebrada Seca watershed in Costa Rica resulting from an increase of urban land cover

verfasst von

Ricardo Bonilla Brenes, Martín Morales, Rafael Oreamuno, Jochen Hack

Abstract

Urbanization is a global phenomenon which has provoked severe disruptions in hydrological cycles, resulting in flooding problems. While detailed studies exist for the world’s temperate zones, they are few for tropical zones where most of future urbanization may occur and where flooding is already a problem. A tropical watershed in Costa Rica was used to analyze the urban development and the associated hydrological response between 1945 and 2019, based on remotely sensed data and a numerical model. Using a detailed spatial-temporal approach, we found that the watershed’s overall urbanization over the timespan (+64%-points urban-areas) had led to major hydrological challenges (+80% runoff-volume, +220% peak-flow-rate and maximum-specific-discharge, and −25 min time-to-peak). These challenges were then placed in the context of historically reported flood events, providing a basis for spatially-differentiated flood mitigation actions and for guiding future urbanization. The study also provides valuable insights for other tropical regions with the same situation.

Organisationseinheit(en)

Digitale Umweltplanung

Externe Organisation(en)

Technische Universität Darmstadt
Universidad de Costa Rica

Typ

Artikel

Journal

Urban water journal

Band

20

Seiten

575-591

Anzahl der Seiten

17

ISSN

1573-062X

Publikationsdatum

05.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Gewässerkunde und -technologie, Geografie, Planung und Entwicklung

Ziele für nachhaltige Entwicklung

SDG 11 – Nachhaltige Städte und Gemeinschaften

Elektronische Version(en)

https://doi.org/10.1080/1573062X.2023.2204877 (Zugang: Offen)