气候变化对泰国东北部孔敬地区土壤盐分积累的影响

IF 0.6 Q4 WATER RESOURCES Hydrological Research Letters Pub Date : 2021-01-01 DOI:10.3178/hrl.15.92
Koshi Yoshida, Supranee Sritumboon, M. Srisutham, K. Homma, M. Maki, K. Oki
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引用次数: 4

摘要

在泰国东北部,17%的农业用地被列为受盐影响。在未来,气候变化可能会加剧受盐影响的土壤问题。因此,在本研究中,我们进行了实地调查,以评估土壤电导率(ECe)的季节变化在泰国东北部孔景府班派地区的盐渍稻田。2016年10月至2018年12月,每2周采集15份土壤样品,分析土壤ECe、土壤含水量和土壤质地。利用HYDRUS-1D模型估算了盐度水平的季节变化,模拟结果与实测数据吻合较好。利用HYDRUS-1D和全球环流模式(MIROC5)在代表性浓度路径8.5情景下的输出,预测了未来的ECe。在2016 - 2100年温度升高2.8°C的情况下,年潜在蒸散量从1430 mm(2016 - 2025)增加到1584 mm(2081-2100)。种植季平均ECe由2016-2025年的2.63 dS/m增加到2081-2100年的3.31 dS/m。作为缓解土壤盐分积累的对策,地下水位降低5 cm可抵消气候变化的负面影响,降低10 cm可显著改善土壤相对于当前土壤盐分水平的ECe。
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Climate change impact on soil salt accumulation in Khon Kaen, Northeast Thailand
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.
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来源期刊
CiteScore
1.90
自引率
18.20%
发文量
9
审稿时长
10 weeks
期刊介绍: Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.
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