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首页> 外文期刊>ournal of the Meteorological Society of Japan >Measurements of Soil Water Content Using Time Domain Reflectometry Sensor and Water Vapor in Surface Soil at the Gobi Site in the Taklimakan Desert
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Measurements of Soil Water Content Using Time Domain Reflectometry Sensor and Water Vapor in Surface Soil at the Gobi Site in the Taklimakan Desert

机译：塔克拉玛干沙漠戈壁地区表层土壤中的水汽利用时域反射计传感器测量

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摘要

Measurements of soil water content, relative humidity ofsoil air, and soil temperature in surface soil at 0.01 m and 0.05 m depths were carried out at a gobi site near Qira in the southern part of the Taklimakan Desert, China from the end of March 2001 to April 2004. By calibrating Time Domain Reflectometry (TDR) sensors at the site, the applicability of TDR sensors for use in natural hyper-arid conditions was shown. In the wetting process, soil water infiltrated in the liquid phase, while the soil water was in the vapor phase during the drying process. As the first step of the drying process, the surface ground at both depths rapidly and thoroughly dried by evaporation due to the daytime soil temperature increase. As the second step, the soil water evaporated predominantly from the shallower depth. However, because of the supply of water vapor from deeper soil, saturated conditions continued at 0.01 m depth. As the third step, the surface ground gradually dried, repeated diurnal variations in humidity of soil air resulted from the decreased supply ofwater vapor from deeper soil. Once soil water was supplied in the soil at the gobi site, soil water and water vapor of soil air at 0.05 m depth were not easy to remove.
机译：从2001年3月底至2001年3月，在中国塔克拉玛干沙漠南部奇拉附近的戈壁地区，对0.01 m和0.05 m深度的土壤水分，土壤空气相对湿度和表层土壤温度进行了测量。 2004年4月。通过在现场校准时域反射法（TDR）传感器，显示了TDR传感器在自然超干旱条件下使用的适用性。在润湿过程中，在干燥过程中，土壤水以液相形式渗透，而土壤水以气相形式。作为干燥过程的第一步，由于白天土壤温度的升高，两个深度的地面都通过蒸发迅速而彻底地干燥了。第二步，土壤水主要从较浅的深度蒸发。但是，由于从更深的土壤中供应了水蒸气，因此饱和条件一直持续到0.01 m的深度。第三步，地面逐渐干燥，土壤空气湿度的反复昼夜变化是由于深层土壤水汽供应减少所致。一旦在戈壁处的土壤中提供了土壤水，就很难去除土壤水和0.05 m深度的土壤空气中的水蒸气。

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