TY - JOUR
T1 - Climate change impact on soil salt accumulation in khon kaen, northeast thailand
AU - Yoshida, Koshi
AU - Sritumboon, Supranee
AU - Srisutham, Mallika
AU - Homma, Koki
AU - Maki, Masayasu
AU - Oki, Kazuo
N1 - Funding Information:
This work was sponsored by DARPA Heterogeneous Integration Program and MARC0 Materials Structures and Devices Focus Center. The authors would like to acknowledge Onur Fidaner of Stanford University for the 1 S5pm wavelength photodetector measurements.
Funding Information:
This work was sponsored by DARPA Heterogeneous Integration Program and MARCO Materials Structures and Devices Focus Center. The authors would like to acknowledge Onur Fidaner of Stanford University for the 1.55?m wavelength photodetector measurements.
Publisher Copyright:
© The Author(s) 2021.
PY - 2021
Y1 - 2021
N2 - In northeast Thailand, 17% of the total agricultural land is classified as salt-affected. In the future, climate change may exacerbate salt-affected soil problems. Therefore, in this study, we conducted a field survey to evaluate seasonal changes in soil electrical conductivity (ECe) in salt-affected paddy areas of Ban Phai District, Khon Kaen Province, northeast Thailand. Fifteen soil samples were collected every 2 weeks from October 2016 to December 2018, and the ECe, soil water content, and soil textures were ana-lyzed. Then, the HYDRUS-1D model was applied to esti-mate seasonal changes in the salinity level, and the simu-lated results corresponded well with observed data. Using HYDRUS-1D and the global circulation model (MIROC5) outputs under the Representative Concentration Pathways 8.5 scenario, future ECe was predicted. Under a tempera-ture increase of 2.8°C from 2016 to 2100, annual potential evapotranspiration increased from 1,430 mm (2016–2025) to 1,584 mm (2081–2100). The average ECe in cultivation season increased from 2.63 dS/m (2016–2025) to 3.31 dS/m (2081–2100). As a countermeasure to mitigate soil salt accumulation, a 5 cm reduction in groundwater level offsets the negative impact of climate change, and a 10 cm reduction significantly improves the soil ECe rela-tive to the current soil salinity level.
AB - In northeast Thailand, 17% of the total agricultural land is classified as salt-affected. In the future, climate change may exacerbate salt-affected soil problems. Therefore, in this study, we conducted a field survey to evaluate seasonal changes in soil electrical conductivity (ECe) in salt-affected paddy areas of Ban Phai District, Khon Kaen Province, northeast Thailand. Fifteen soil samples were collected every 2 weeks from October 2016 to December 2018, and the ECe, soil water content, and soil textures were ana-lyzed. Then, the HYDRUS-1D model was applied to esti-mate seasonal changes in the salinity level, and the simu-lated results corresponded well with observed data. Using HYDRUS-1D and the global circulation model (MIROC5) outputs under the Representative Concentration Pathways 8.5 scenario, future ECe was predicted. Under a tempera-ture increase of 2.8°C from 2016 to 2100, annual potential evapotranspiration increased from 1,430 mm (2016–2025) to 1,584 mm (2081–2100). The average ECe in cultivation season increased from 2.63 dS/m (2016–2025) to 3.31 dS/m (2081–2100). As a countermeasure to mitigate soil salt accumulation, a 5 cm reduction in groundwater level offsets the negative impact of climate change, and a 10 cm reduction significantly improves the soil ECe rela-tive to the current soil salinity level.
KW - Climate change
KW - HYDRUS-1D
KW - Paddy rice
KW - Salt affected soil
KW - Thailand
UR - http://www.scopus.com/inward/record.url?scp=85119952012&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85119952012&partnerID=8YFLogxK
U2 - 10.3178/hrl.15.92
DO - 10.3178/hrl.15.92
M3 - Article
AN - SCOPUS:85119952012
SN - 1882-3416
VL - 15
SP - 92
EP - 97
JO - Hydrological Research Letters
JF - Hydrological Research Letters
IS - 4
ER -
