Christian González

Diego Portales University

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Co-Authors

Cristián Escauriaza

Pontificia Universidad Católica de Chile

Pablo Pastén

Pontificia Universidad Católica de Chile

Gonzalo Pizarro

Pontificia Universidad Católica de Chile

Nicolas Riviére

Laboratoire de Mécanique des Fluides et d'Acoustique

Joseph Calantoni

Stennis Space Center

David H. Richter

University of Notre Dame

Cristián Rodrigo Escauriaza-Mesa

Karina Andrea Soto

Paula Guerra

Federico Santa María Technical University

Diogo Bolster

University of Notre Dame

Cooperative Institutions

Pontificia Universidad Católica de Chile

Hospital del Salvador

Universidad de Playa Ancha de Ciencias de la Educación

University of Concepción

University of Chile

Centre For Sustainable Urban Development

Université Claude Bernard Lyon 1

Laboratoire de Mécanique des Fluides et d'Acoustique

Institut National des Sciences Appliquées de Lyon

Arizona State University

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Models of bed-load transport across scales: turbulence signature from grain motion to sediment flux

Stochastic Environmental Research and Risk Assessment (2022)

Cristián Escauriaza Christian González Megan E. Williams Wernher Brevis

Temporal scales

10.1007/s00477-022-02333-9

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Citations (2)

The fate of arsenic in sediments formed at a river confluence affected by acid mine drainage

AGU Fall Meeting Abstracts (2012)

Paula Guerra Pablo Pastén Gonzalo Pizarro Kyle Simonson Cristián Escauriaza

Confluence

Acid Mine Drainage

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Characterization of the intermittent behavior of sediment transport from numerical simulations on a flat bed channel

AGU Fall Meeting Abstracts (2014)

Christian González Cristián Escauriaza David H. Richter Joseph Calantoni D. Bolster

Characterization

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Regional piedmont incision during base-level rise in the northeastern Sonoran Desert, Arizona, USA

Physical Geography (2021)

Christian González Madeline Kelley M. Colin Marvin Norma López-Castañeda Ronald I. Dorn

Ephemeral channels incise into the piedmonts (both alluvial fans and pediments) of the northeastern Sonoran Desert, USA. Located around metropolitan Phoenix, this tectonically quiescent region experienced only aggradation in endorheic structural basins throughout the Pliocene. A wave of aggradation then followed Salt and Gila river integration at the start of the Pleistocene. Aggradation of piedmont base levels continued throughout the rest of the Quaternary. This paper explores two hypotheses to explain piedmont incision despite rising base levels. The classic explanation is that incision is part of the evolution of desert mountain ranges as they decrease in size. A new alternative we propose here involves a lateral shift in base level from Pliocene endorheic basin playas to positions kilometers closer to range fronts in response to river integration. We present a thought exercise of modeling a pediment longitudinal profile as a 1D diffusive system, and we also analyze incision into alluvial fans of the Sierra Estrella range. While our 1D modeling results for pediments are consistent with both explanations for range-front incision, Sierra Estrella bajada incision is best explained by the sudden relocation of the base level to the toe of desert piedmonts.

Aggradation

Alluvial fan

Ephemeral key

10.1080/02723646.2021.1934964

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Citations (2)

Daily Freeze–Thaw Cycles Affect the Transport of Metals in Streams Affected by Acid Drainage

Water (2016)

Paula Guerra Kyle Simonson Christian González Jorge Gironás Cristián Escauriaza

Stream flow rates with seasonal, daily, or hourly cycles due to freezing and thawing can control downstream chemical processes by changing the mixing ratio of reactive flows. The extent of these hydrologic-chemical interactions has not been fully realized yet. This work explored the link between daily freeze-thaw cycles and the fate and transport of metals at a model stream impacted by acid drainage. We characterized hydrological and physicochemical parameters at the confluence between the Caracarani River (pH ~8.6) and the Azufre River (pH < 2), in northern Chile. Hourly water depth, temperature, and electrical conductivity monitoring coupled with pH and turbidity measurements revealed that maximum flow rates from thawing of the Azufre River induced characteristic daily drops in pH and turbidity. Shifts in pH controlled the precipitation and dissolution of arsenic-rich iron and aluminum reactive phases. Thus freeze-thaw processes are critical at streams receiving acid drainage where iron and aluminum phases form and are likely to impact the fate and transport of toxic metals in the system. This work highlights the importance of assessing the hydrological controls on flows and mixing ratios when studying the chemical reactivity and fate of contaminants at systems affected by acid drainage.

Turbidity

Acid Mine Drainage

10.3390/w8030074

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Citations (12)

Coherent structure dynamics and sediment particle motion around a cylindrical pier in developing scour holes

Acta Geophysica (2012)

Óscar Link Christian González María Maldonado Cristián Escauriaza

Large-Eddy Simulation

Magnetosphere particle motion

Particle (ecology)

10.2478/s11600-012-0068-y