2026-05-31T06:24:21Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/403422026-02-03T11:22:19Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Pozzo-Pirotta, Leonardo J.
author
Montes-Pérez, Jorge Juan
author
Sammartino, Simone
author
Marcé, Rafael
author
Obrador Sala, Biel
author
Escot, Carmelo
author
Reyes, Isabel
author
Moreno-Ostos, Enrique
2025-10-20T12:18:10Z
2025-10-20T12:18:10Z
2022
Pozzo-Pirotta, L., J.J. Montes-Pérez, S. Sammartino, R. Marcé, B. Obrador, C. Escot, I. Reyes, E. Moreno-Ostos. 2022. Carbon dioxide emission from drawdown areas of a Mediterranean reservoir. Limnetica, 41(1): 61-72
https://hdl.handle.net/10630/40342
10.23818/limn.41.05
Sediment beds from drawdown areas of reservoirs constitute a relevant hotspot for carbon dioxide (CO2) emission to the atmosphere. This CO2 source is especially relevant in the case of Mediterranean reservoirs, where hydrological variability favors the exposure of large sediment areas to air. In spite of this, the role of dry sediments as CO2 emitters has been typically neglected in lakes and reservoirs greenhouse gas emission assessments, and there is also a lack of research on the spatial variability of CO2 fluxes from drawdown sediments. In this study we contribute to this knowledge by combining drone-based aero-photogrammetry techniques with in situ infrarred gas analyzer measurements to assess the magnitude and spatial variability of CO2 fluxes from the drawdown area of a Mediterranean reservoir (El Gergal, Southwestern Spain) during one dry season. Our results show that during survey dry sediments in El Gergal were a relevant net CO2 source to the atmosphere, with a mean emission of
0.36 ± 0.38 g CO2 m-2 h-1. In addition, CO2 fluxes from El Gergal drawdown depict a marked spatial variability, with maximum values measured in areas influenced by river or intermittent streams discharges. Distance to the shore, sediment particle size, pH and temperature also have a significant effect on CO2 emissions from the reservoir dry banks. The expected strengthening of droughts intensity and frequency in the Mediterranean region could enhance the role of exposed sediments from the drawdown of reservoirs as CO2 source to the atmosphere.
eng
Dióxido de carbono
Emisiones de gases
Embalses - Mediterráneo (Región)
Fotogrametría aérea
Sedimentos lacustres
Hidrología
Carbon dioxide emission from drawdown areas of a Mediterranean reservoir.
journal article
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Limnetica_2022b.pdf