Climate change impact on soil salt accumulation in Khon Kaen, Northeast Thailand

Yoshida, Koshi; Sritumboon, Supranee; Srisutham, Mallika; Homma, Koki; Maki, Masayasu; Oki, K.

doi:10.3178/hrl.15.92

Cited by 6 publications

(8 citation statements)

References 19 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on a simulated water budget for the area (Yoshida et al, 2021), potential evapotranspiration was 1421 mm per year on average from 2016 to 2019; the differences of precipitation minus potential evapotranspiration were 358 mm in rainy season (from May to October) and -541 mm in dry season (November to April) on average. The precipitation from August to October (e.g.…”

Section: Resultsmentioning

confidence: 99%

“…The localized differences in the trend of non-vegetated areas were likely affected by groundwater. EC of groundwater in the area was high and stable (44.8 ± 1.2 dS m -1 , from July 16, 2017, to October 6, 2018; data retrieved from Yoshida et al, 2021) and shallow (-46 ± 8 cm, from August 1 to October 6, 2017; -196 ± 9 cm from February 1 to April 30, 2018; -75 ± 10 cm from August 1 to October 6, 2018), being the major resource of salinity.…”

Section: Resultsmentioning

confidence: 99%

“…The combination of soil chemical properties based on satellites with vegetation evaluations based on UAVs would be an effective tool to 6 evaluate the effects of salinity on crop production in wider regions. Yoshida et al (2021) assessed the climate change impact of soil salt accumulation by simulating soil water content and predicted that soil ECe would increase in the future. Since this study did not suggest an increasing trend in soil EC or non-vegetated areas, monitoring for longer durations would be necessary.…”

Section: Resultsmentioning

confidence: 99%

“…The soil salinity is derived from underground salt rock in Northeast Thailand (Gardner, 1967). Accordingly, the groundwater has a considerable effect on salinity, further complicating the situation (Seeboonruang, 2013;Yoshida et al, 2021). Some studies have reported the expansion of salt-affected areas (Ratanopad and Kainz, 2006), but the details of these expansions are still unknown.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the situation described above, we conducted field investigations to evaluate salinity conditions in relation to rice production in Ban Phai district, Khon Kaen province in Northeast Thailand, which is one of the most severely salt-affected regions. One accompanying papers in this special issue analyzed soil salt accumulation by simulating soil water movement (Yoshida et al, 2021). We also analyzed spectral reflectance of salinity affected fields to evaluate salinity conditions at a regional scale with satellite remote sensing (Maki et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Yearly change in severely salt-damaged areas in paddy fields in Ban Phai in Northeast Thailand

Maki

et al. 2022

Hydrological Research Letters

Self Cite

View full text Add to dashboard Cite

Future expansion of salt-damaged areas is anticipated in Northeast Thailand. We conducted a field investigation of paddy fields from 2016 to 2019 in Ban Phai district, Khon Kaen province in Northeast Thailand to evaluate yearly changes in the effect of salinity damage on rice production. The investigation area was classified into severely saltaffected areas (2 nd of 5 classes) based on the definition used in Thailand. Since salinity severely damages rice production, rice cultivation was abandoned in some fields, although some were still planted. The soil electrical conductivity (EC) in the rice-planted paddy fields changed yearly in association with the amount of precipitation. The effect of the difference in EC on rice yield was moderate, suggesting that rice yield was mediated by surface water. Some areas in the abandoned fields did not have any vegetation, and quite high soil EC values were observed. The non-vegetated areas evaluated based on yearly unmanned aerial vehicle (UAV) images changed partly due to the amount of precipitation. However, some non-vegetated areas decreased in contrast to the decrease in precipitation, probably because of the effect of groundwater. Although the continuous expansion of severely salt-damaged areas was not observed, the monitoring of salinity levels is recommended for the future.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Yearly change in severely salt-damaged areas in paddy fields in Ban Phai in Northeast Thailand

Maki

et al. 2022

Hydrological Research Letters

Self Cite

View full text Add to dashboard Cite

show abstract

Future changes in soil salinization across Central Asia under CMIP6 forcing scenarios

Dong,

Ding,

2024

Land Degrad Dev

View full text Add to dashboard Cite

Soil salinization is a critical environmental and socio‐economic concern with global implications, and its severity is expected to amplify under changing climate. The impact of climate change on salinization in Central Asia is still not fully understood. This study addresses this gap by employing a digital soil mapping (DSM) framework. Cubist, random forest (RF), and quantile regression forests (QRF) are utilized to project variations in soil surface salinity (0‐10 cm) in Central Asia from 2025 to 2100 under two shared socio‐economic pathways (SSPs): SSP2‐4.5 and SSP5‐8.5. These models are developed using data from 20 global climate models (GCMs) obtained from the Coupled Model Intercomparison Project Phase 6 (CMIP6). The results reveal that the RF model exhibits superior predictive capability in estimating soil salinity. RF performed on the calibration set with a coefficient of determination (R2) of 0.86, root mean square error (RMSE) of 9.84 and 9.90 dS m−1, ratio of performance to interquartile distance (RPIQ) of 3.09 and 3.07, and a Nash–Sutcliffe efficiency (NSE) of 0.86. The multi‐GCM ensemble means revealed the potential for varying degrees of salinization in Central Asia, with higher levels predominantly observed in the southeast and southwest of the study area, particularly downstream of the river and in the lakeside areas. Temporal analysis of soil salinity evolution reveals an overall increase in salinity across the region, with more notable changes projected under SSP5‐8.5. Specifically, the projected increase rate in soil salinity for Central Asia was 0.0005 dS m−1/year under SSP2‐4.5 and 0.01 dS m−1/year under SSP5‐8.5. Turkmenistan is notable for possessing the highest regional average of soil salinity, with the exception of a declining trend observed within this area. The remaining regions of Central Asia exhibit an upward trend in average soil salinity, particularly noteworthy under the SSP5‐8.5 scenario, where variations in soil salinity are more obvious. These findings hold significant potential in enhancing our understanding of how Central Asia responds to global change, advances toward sustainable development, and enhances comprehension of the dynamics within the region.

show abstract

Climate Change Impacts on Soil Moisture and Temperature in the Plain and Mountainous Regions of Gifu Prefecture, Japan

Asano

Kojima

Kato

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Climate change alters air temperature, precipitation, and rainfall patterns, thereby affecting the soil environment, including soil water content and temperature. The impact of climate change on soil environment varies from region to region. Therefore, it is important to evaluate the impacts of climate change on the soil environment using meteorological and soil information specific to each region. The Gifu Prefecture, Japan, has a large area and rich topographical diversity. This study aimed to elucidate the impact of climate change on the soil environment in the plain and mountainous regions of Gifu Prefecture. The present (2011–2020) and future (2091–2100) soil temperature, water content, and snow depth were calculated using HYDRUS-1D and Agro-Meteorological Grid Square Data. The analysis predicted an increase in soil temperatures by 3°C in the future. The increase in soil temperature at the plain site was larger than that at the mountainous site. The future soil water content in the plain site increased (by 0.01×10−3 m3 m−3) and that in the mountainous site decreased (by 0.67×10−3 m3 m−3). These results may differ depending on the global circulation model selected. The mountainous site indicated heavier snowfall in winter, affecting the soil water content. The plain site was more sensitive to climate change than the mountainous site with respect to soil temperature, and the mountainous site was more sensitive to climate change with respect to soil moisture. This study revealed the impacts of climate change on two regions, in the future we will expand our analysis to cover the entire Gifu prefecture.

show abstract

Climate change impact on soil salt accumulation in Khon Kaen, Northeast Thailand

Cited by 6 publications

References 19 publications

Yearly change in severely salt-damaged areas in paddy fields in Ban Phai in Northeast Thailand

Yearly change in severely salt-damaged areas in paddy fields in Ban Phai in Northeast Thailand

Future changes in soil salinization across Central Asia under CMIP6 forcing scenarios

Climate Change Impacts on Soil Moisture and Temperature in the Plain and Mountainous Regions of Gifu Prefecture, Japan

Contact Info

Product

Resources

About