TY - JOUR
T1 - Analyses and numerical evaluation of integrated time-series monitoring datasets including CO2 concentration and fluxes at controlled CO2 release site in South Korea
AU - Seo, Do Hyun
AU - Han, Weon Shik
AU - Park, Eungyu
AU - Jeong, Jina
AU - Oh, Yun Yeong
AU - Kim, Hyun Jun
AU - Yoo, Gayoung
AU - Jun, Seong Chun
AU - Yun, Seong Taek
N1 - Funding Information:
The research was supported by the Korea Environmental Industry and Technology Institute (project number: 2018002440003 ), Basic Science Research program through the National Research Foundation of Korea funded by the Ministry of Education (project number: 2016R1D1A1B01008715 ), and the demonstration-scale offshore CO2 storage project in Pohang basin, Republic of Korea, funded from Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and planning (KETEP) (project number: 20162010201980). The simulation input will be available from the public data sharing site such as Zenodo.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11
Y1 - 2020/11
N2 - In Eumseong, Republic of Korea, a controlled CO2 release site was designed by Korea CO2 Storage Environmental Management (K-COSEM) Research Center to evaluate properly integrated CO2 monitoring tools at the soil surface. CO2 was released from the 55 m-length PVC-pipe buried at 2.5 m-depth, and then, CO2 concentration and flux were monitored from August 1, 2015 to March 21, 2018 (965 days). Influencing environmental factors such as meteorological data, soil moisture and temperature at 5 different depths were monitored concurrently. The measured soil moisture content decreased rapidly when the soil temperature dropped below 0 °C. When CO2 release began, both surface CO2 flux and soil CO2 concentration increased with a time lag. However, with occurrence of precipitation events, CO2 flux decreased to almost 0 cm3 cm−2 day−1 but soil CO2 concentration increased rapidly. The HYDRUS-SOILCO2 predicted soil moisture, temperature and natural background CO2 flux compared to measured data (R2 = 0.74, 0.89, and 0.85). The 10 scenarios were constructed with different soil characteristic curves. Unlike soil moisture content, the simulated natural CO2 flux did not depend heavily on soil characteristics. The mass of released CO2 was estimated by the difference between the measured CO2 flux data during the release test and natural CO2 prediction model. At the 2nd CO2 release test, there was 1.5 times difference between the actual released CO2 mass and calculated CO2 mass.
AB - In Eumseong, Republic of Korea, a controlled CO2 release site was designed by Korea CO2 Storage Environmental Management (K-COSEM) Research Center to evaluate properly integrated CO2 monitoring tools at the soil surface. CO2 was released from the 55 m-length PVC-pipe buried at 2.5 m-depth, and then, CO2 concentration and flux were monitored from August 1, 2015 to March 21, 2018 (965 days). Influencing environmental factors such as meteorological data, soil moisture and temperature at 5 different depths were monitored concurrently. The measured soil moisture content decreased rapidly when the soil temperature dropped below 0 °C. When CO2 release began, both surface CO2 flux and soil CO2 concentration increased with a time lag. However, with occurrence of precipitation events, CO2 flux decreased to almost 0 cm3 cm−2 day−1 but soil CO2 concentration increased rapidly. The HYDRUS-SOILCO2 predicted soil moisture, temperature and natural background CO2 flux compared to measured data (R2 = 0.74, 0.89, and 0.85). The 10 scenarios were constructed with different soil characteristic curves. Unlike soil moisture content, the simulated natural CO2 flux did not depend heavily on soil characteristics. The mass of released CO2 was estimated by the difference between the measured CO2 flux data during the release test and natural CO2 prediction model. At the 2nd CO2 release test, there was 1.5 times difference between the actual released CO2 mass and calculated CO2 mass.
KW - CO flux
KW - CO mass
KW - CO release
KW - Meteorological
KW - Soil moisture content
UR - http://www.scopus.com/inward/record.url?scp=85087198120&partnerID=8YFLogxK
U2 - 10.1016/j.jhydrol.2020.125213
DO - 10.1016/j.jhydrol.2020.125213
M3 - Article
AN - SCOPUS:85087198120
SN - 0022-1694
VL - 590
JO - Journal of Hydrology
JF - Journal of Hydrology
M1 - 125213
ER -