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季節(jié)性凍融期不同潛水位埋深下土壤蒸發(fā)規(guī)律模擬研究
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國家自然科學(xué)基金資助項(xiàng)目(40472132、51409184)、國家國際科技合作專項(xiàng)資助項(xiàng)目(2012DFA20770),、高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目(20131402110008),、山西省自然科學(xué)基金資助項(xiàng)目(2012011033—2)和太原理工大學(xué)2014年度校基金團(tuán)隊(duì)資助項(xiàng)目(2014TD050)


Simulation of Soil Moisture Evaporation under Different Groundwater Level Depths during Seasonal Freeze-thaw Period
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    摘要:

    為了揭示季節(jié)性凍融期不同潛水位埋深和土壤質(zhì)地對土壤蒸發(fā)的影響,,通過連續(xù)2個(gè)凍融期的蒸滲計(jì)土壤剖面含水率和土壤溫度的監(jiān)測,利用水熱耦合運(yùn)移模型模擬研究了4種不同潛水位埋深(0.5、1.0,、1.5、2.0m)下砂壤土和壤砂土的土壤蒸發(fā)規(guī)律,。結(jié)果表明:不穩(wěn)定凍結(jié)階段和消融解凍階段地表土壤均出現(xiàn)晝?nèi)谝箖龅奶卣?,土壤液態(tài)水分較多,砂壤土和壤砂土蒸發(fā)量分別占整個(gè)凍融期的91.7%和81.8%以上,。穩(wěn)定凍結(jié)階段的土壤蒸發(fā)量隨著潛水位埋深的增加而增大,,但小于0.31mm。潛水位埋深為0.5m時(shí)凍融期土壤蒸發(fā)量最大,,砂壤土和壤砂土分別為47.28mm和25.60mm,,隨著潛水位埋深的增加,凍融期土壤蒸發(fā)量呈指數(shù)型減少,,土壤顆粒直徑相對較大的壤砂土土壤蒸發(fā)量隨潛水位埋深的增加而衰減的幅度較為明顯,。該研究可為地下水淺埋區(qū)土壤鹽漬化的防治和地下水資源量的科學(xué)評價(jià)提供依據(jù)。

    Abstract:

    At present, many studies are carried out on influencing factors of soil moisture evaporation (SME), mechanism and controlling technology of SME at non-freezing period. However, the researches about SME during freeze-thaw period are few because the monitoring on SME is difficult. In order to reveal the influence of groundwater level depth and soil texture on SME during seasonal freeze-thaw period, based on two successive freeze-thaw period monitoring of soil water content and temperature of the lysimeter, SME of sandy loam and loamy sand under four kinds of groundwater level depths (0.5m, 1.0m, 1.5m, 2.0m) was simulated by using SHAW model. The results show that the soil is thawing in day and freezing at night, and then liquid water is more during unsteady freezing stage and thawing stage. SME of sandy loam and loamy sand are more than 91.7% and 81.8% respectively during freezing and thawing periods. SME was increasing with the increase of groundwater level depth while it was lower than 0.31mm during steady freezing stage. SME was 47.28mm for sandy loam and 25.60mm for loamy sand when the groundwater level depth was 0.5m. SME decreases exponentially with the increasing groundwater level depth during freeze-thaw period, and the decreasing amplitude of SME for loamy sand is more obvious for its larger soil particle diameter.

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陳軍鋒,鄭秀清,張永波,秦作棟,孫明.季節(jié)性凍融期不同潛水位埋深下土壤蒸發(fā)規(guī)律模擬研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2015,46(5):131-140. Chen Junfeng, Zheng Xiuqing, Zhang Yongbo, Qin Zuodong, Sun Ming. Simulation of Soil Moisture Evaporation under Different Groundwater Level Depths during Seasonal Freeze-thaw Period[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(5):131-140.

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  • 收稿日期:2014-12-23
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  • 在線發(fā)布日期: 2015-05-10
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