Welcome to the University of California, Merced Water Systems Management Lab!

The University of California, Merced Water Systems Management (WSM) Lab is devoted to combating issues relating to water availability, quality and distribution using modernized, interdisciplinary approaches. Topics of research interest in the lab include agricultural production, consumptive use, hydro-economic modeling and water-informatics.

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Find out about our publications, workshops, and other information

Congratulations Humberto Flores-Landeros!

Humberto’s passion for the environment began at Lincoln Elementary school in his hometown of Santa Rosa, California. There he learned about the impacts of global warming on a heronry located in his neighborhood. After high school, he enrolled at his local community college with the goal to one day transfer to a four-year university and pursue a degree in Environmental Engineering. In the Fall of 2018, Humberto started his first semester at UC Merced. His research interest on the climate change effects on water resources found him at the Water Systems Management Lab, led by Dr. Josué Medellín-Azuara. There he got the opportunity to do fulfilling research working with disadvantaged communities in the San Joaquin Valley. Next, Humberto plans to work in industry before returning to pursue his graduate education in the Fall of 2021.

Precipitation‐drainage cycles lead to hot moments in soil carbon dioxide dynamics in a Neotropical wet forest

Tropical wet forests are essential to preserve the global carbon balance, yet tropical soil‐carbon dynamics are not well understood. We study the short‐term effects of meteorological variability and predict the long‐term effects of climate change on soil CO2 in a Neotropical wet forest in Costa Rica. Short‐term soil CO2 emissions include significant out‐gassing events (“hot moments”) which were associated with rainfall events. Simulated long‐term warming scenarios resulted in increased soil CO2 concentrations, with drier future conditions increasing emissions the most. Our findings suggest that tropical wet forest soil CO2 will increase under climate change while precipitation patterns will regulate emissions.