Sebastián Granados-Bolaños

Universidad de Costa Rica

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Adolfo Quesada‐Román

Universidad de Costa Rica

Christian Birkel

Universidad de Costa Rica

Néstor Campos

Universidad de Alcalá

Markus Stoffel

University of Geneva

Ricardo Sánchez‐Murillo

The University of Texas at Arlington

Nicola Surian

University of Padua

Juan Antonio Ballesteros–Cánovas

University of Geneva

Vanessa Solano‐Rivera

Universidad de Costa Rica

Kenneth Gutiérrez‐García

Universidad de Costa Rica

Javier Vasquez‐Morera

Universidad de Costa Rica

Cooperative Institutions

Universidad de Costa Rica

University of Aberdeen

Leibniz Institute of Freshwater Ecology and Inland Fisheries

University of Geneva

Oeschger Centre for Climate Change Research

Institute for Environmental Sciences

Impact

Universidad Nacional

Universidad Complutense de Madrid

University of Bern

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Equilibrium-line altitude and temperature reconstructions during the Last Glacial Maximum in Chirripó National Park, Costa Rica

Journal of South American Earth Sciences (2020)

Adolfo Quesada‐Román Néstor Campos Jesús Alcalá-Reygosa Sebastián Granados-Bolaños

Last Glacial Maximum

Lapse rate

Glacier mass balance

Elevation (ballistics)

10.1016/j.jsames.2020.102576

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Citations (27)

Channel morphology in an active volcanic complex under humid tropical conditions

Geomorphology (2025)

Sebastián Granados-Bolaños Nicola Surian

Morphology

10.1016/j.geomorph.2025.109689

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Citations (0)

Channel Morphology and Processes in an Active Volcanic Complex Under Humid Tropical Conditions

Sebastián Granados-Bolaños Nicola Surian

Morphology

10.2139/ssrn.4859902

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Citations (0)

Headwaters drive streamflow and lowland tracer export in a large‐scale humid tropical catchment

Hydrological Processes (2020)

Christian Birkel Alicia Correa Marco Martinez‐Martinez Sebastián Granados-Bolaños Nelson Venegas‐Cordero

Abstract Headwaters are generally assumed to contribute the majority of water to downstream users, but how much water, of what quality and where it is generated are rarely known in the humid tropics. Here, using monthly monitoring in the data scarce (2,370 km 2 ) San Carlos catchment in northeastern Costa Rica, we determined runoff‐area relationships linked to geochemical and isotope tracers. We established 46 monitoring sites covering the full range of climatic, land use and geological gradients in the catchment. Regression and cluster analysis revealed unique spatial patterns and hydrologically functional landscape units. These units were used for seasonal and annual Bayesian tracer mixing models to assess spatial water source contributions to the outlet. Generally, the Bayesian mixing analysis showed that the chemical and isotopic imprint at the outlet is throughout the year dominated by the adjacent lowland catchments (68%) with much less tracer influence from the headwaters. However, the headwater catchments contributed the bulk of water and tracers to the outlet during the dry season (>50%) despite covering less than half of the total catchment area. Additionally, flow volumes seemed to be linearly scaled by area maintaining a link between the headwaters and the outlet particularly during high flows of the rainy season. Stable isotopes indicated mean recharge elevations above the mean catchment altitude, which further supports that headwaters were the primary source of downstream water. Our spatially detailed “snap‐shot” sampling enabled a viable alternative source of large‐scale hydrological process knowledge in the humid tropics with limited data availability.

TRACER

Base flow

Wet season

Catchment hydrology

Dry season

10.1002/hyp.13841

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Citations (16)

Low-cost UAV applications in dynamic tropical volcanic landforms

Journal of Volcanology and Geothermal Research (2020)

Sebastián Granados-Bolaños Adolfo Quesada‐Román Guillermo E. Alvarado

Landform

Volcanic hazards

Volcanology

Rockfall

10.1016/j.jvolgeores.2020.107143

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Citations (73)

Exploring extreme rainfall impacts on flow and turbidity dynamics in a steep, pristine and tropical volcanic catchment

CATENA (2019)

Vanessa Solano‐Rivera Josie Geris Sebastián Granados-Bolaños Liz Brenes-Cambronero Guillermo Artavia-Rodríguez

Return period

Silt

Bedrock

10.1016/j.catena.2019.104118

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Citations (37)

Tropical glacier reconstructions during the Last Glacial Maximum in Costa Rica

Revista Mexicana de Ciencias Geológicas (2021)

Adolfo Quesada‐Román Néstor Campos Sebastián Granados-Bolaños

Numerous high elevation tropical mountains around the world show evidence of past glacial activity during the Last Glacial Maximum (LGM). Cerro Chirripó in Costa Rica exhibits paleoglacial landforms such as glacial cirques, moraine deposits and polished and striated bedrock surfaces. We used aerial imagery (1:25000) and contour lines to develop a Digital Elevation Model (DEM) for the LGM. We determined paleo-equilibrium line altitudes (paleo-ELAs) using Area-Altitude Balance Ratio (AABR) during the LGM for Cerro Chirripó in Costa Rica. Additionally, a Generalized Linear Model (GLM) was performed to statistically analyze the paleoglacier volumes and ice thickness combined with ten land surface parameters (LSP). Our results identified thirty-one paleoglaciers covering an area of 28.26 km2 during the global LGM, with a maximum ice thickness of 178 meters in Cerro Chirripó, a total volume of 13863 × 105 m3 and a mean paleo-ELA of 3490 meters. In addition, Area and Slope were the LSP with the highest statistical correlation to explain the paleoglacier volumes, while Area and Diurnal Anisotropic Heating were best for the paleoglacier ice thickness. As one of the first studies in the tropical high mountain environments, this work expands the geographic scope of glacier volume and thickness reconstructions during the maximum expansion of the LGM.

Last Glacial Maximum

Landform

Elevation (ballistics)

Surface exposure dating

10.22201/cgeo.20072902e.2021.1.1600

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Citations (21)

Dendrogeomorphic reconstruction of floods in a dynamic tropical river

Geomorphology (2020)

Adolfo Quesada‐Román Juan Antonio Ballesteros–Cánovas Sebastián Granados-Bolaños Christian Birkel Markus Stoffel

Landform

Flash flood

10.1016/j.geomorph.2020.107133

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Citations (61)

Improving regional flood risk assessment using flood frequency and dendrogeomorphic analyses in mountain catchments impacted by tropical cyclones

Geomorphology (2021)

Adolfo Quesada‐Román Juan Antonio Ballesteros–Cánovas Sebastián Granados-Bolaños Christian Birkel Markus Stoffel

River floods frequently occur when tropical cyclones hit land. Nonetheless, systematic, long-term discharge data remain rather scarce in many tropical countries, which prevent proper analysis of peak discharges occurring during floods. The Térraba catchment is the biggest and most dynamic catchment in Costa Rica. In this study, we developed regional flood-frequency analyses combining tree-ring based estimation and measurement of peak discharge at monitoring stations during tropical cyclones to derive flood quartiles. Flood quartiles were combined with the Topographic Wetness Index (TWI) to determine regional flood hazards along floodplains. The flood risk assessment was based on a high-resolution mapping of infrastructure, population density (as a measure of exposure), and a social development index (to represent vulnerability). We show that peak discharge of cyclone-induced floods can be assessed accurately with flood-frequency analyses including dendrogeomorphic reconstructions and systematic discharge measurements. We also show that regional flood risk assessments can be performed in large-scale catchments if both coarse and detailed inputs are used. The results of this study will be useful for the development of flood risk schemes promoting resilience of local populations.

Flood forecasting

Flood risk assessment

Flash flood

Natural hazard

Return period

10.1016/j.geomorph.2021.108000

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Citations (60)