RT Journal Article
T1 Carbon dioxide emission from drawdown areas of a Mediterranean reservoir.
A1 Pozzo-Pirotta, Leonardo J.
A1 Montes-Pérez, Jorge Juan
A1 Sammartino, Simone
A1 Marcé, Rafael
A1 Obrador Sala, Biel
A1 Escot, Carmelo
A1 Reyes, Isabel
A1 Moreno-Ostos, Enrique
K1 Dióxido de carbono
K1 Emisiones de gases
K1 Embalses - Mediterráneo (Región)
K1 Fotogrametría aérea
K1 Sedimentos lacustres
K1 Hidrología
AB 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 of0.36 ± 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.
PB Asociación Ibérica de Limnología
YR 2022
FD 2022
LK https://hdl.handle.net/10630/40342
UL https://hdl.handle.net/10630/40342
LA eng
NO 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
NO Ministerio de Economía y Competitividad. Gobierno de España
NO CGL2017-86788-C3-1P
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026