A model for simulating evaporation from seasonally frozen saline soil

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology Pub Date : 2025-04-09 DOI:10.1016/j.jhydrol.2025.133259

Jun Mao, Jingwei Wu, Yawen Liu, Chenyao Guo, Chunan Xiao, Yan Lu, Liya Zhao, Renjie Zhang, Hanyi Zhang

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引用次数: 0

Abstract

Evaporation from soil significantly influences soil physicochemical characteristics, water resource management, and crop growth. Therefore, studying soil evaporation under saline conditions is essential for preventing soil salinization, improving water-use efficiency and promoting sustainable agriculture. In this study, a numerical model tailored for calculating evaporation from saline soil in seasonally frozen regions is introduced. The model comprehensively accounts for the changes in the upper boundaries of the soil due to salinity changes and incorporates three components: (1) decreased osmotic potential (DOP) at the soil surface, (2) increased salt resistance (ISR) to the diffusion of water vapour from the salt crust, and (3) increased soil albedo (ISA) due to the presence of the salt crust. The proposed model (M1) is validated through a field soil column test conducted in a seasonally frozen region and with data from two published laboratory-based studies of evaporation from saline soil. We compare the performance of M1 with that of both a model (M2) that neglects salinity effects and the widely-used SHAW model. The M1 simulation results are in good agreement with the measured values across all three cases. The average relative errors (AREs) for evaporation calculated with M1 remain below 10 % in all cases, indicating its high accuracy. Neglecting or inadequately considering the role of salinity results in significant errors in simulating soil evaporation and water–heat–salt transport, with the maximum ARE for evaporation reaching as high as 130 %. Salt inhibits both soil evaporation and water–salt migration, whereas it initially promotes and then restrains the soil temperature. The relative impacts of salt on soil evaporation and water-heat-salt transport processes are ranked as follows: ISA > ISR > DOP. In this study, a theoretical framework is established to provide a practical tool for simulating soil evaporation and water–heat–salt interactions in saline soil.

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模拟季节性冻结盐渍土蒸发的模型

土壤蒸发对土壤理化特性、水资源管理和作物生长有显著影响。因此，研究盐渍化条件下的土壤蒸发对防止土壤盐渍化、提高水分利用效率、促进农业可持续发展具有重要意义。本文介绍了一种适合季节性冻土区盐渍土蒸发量计算的数值模型。该模型综合考虑了土壤上边界因盐度变化而发生的变化，并包含三个组成部分：(1)土壤表面渗透势（DOP）降低，(2)盐壳对水汽扩散的盐阻力（ISR）增加，以及(3)盐壳存在导致的土壤反照率（ISA）增加。提出的模型（M1）通过在季节性冻结地区进行的现场土柱试验和两项已发表的基于实验室的盐渍土蒸发研究的数据进行了验证。我们将M1的性能与忽略盐度影响的模型（M2）和广泛使用的SHAW模型进行了比较。在所有三种情况下，M1模拟结果与实测值非常吻合。在所有情况下，用M1计算蒸发量的平均相对误差（AREs）保持在10%以下，表明其精度较高。忽略或不充分考虑盐分的作用会导致模拟土壤蒸发和水-热-盐运移的误差较大，蒸发的最大ARE值高达130%。盐对土壤蒸发和水盐迁移均有抑制作用，但对土壤温度有先促进后抑制的作用。盐对土壤蒸发和水-热-盐运输过程的相对影响排序如下：ISA >；ISR祝辞夹住。本研究建立了一个理论框架，为模拟盐渍土中土壤蒸发和水-热-盐相互作用提供了一个实用工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Hydrology 地学-地球科学综合

CiteScore

11.00

自引率

12.50%

发文量

1309

审稿时长

7.5 months

期刊介绍： The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.