CAJ | 학술논문

滴灌带之间土壤中的热质传递规律是一个复杂的水热耦合运移问题。其水热耦合迁移机制随着每个地区土壤性质、气候等的不同而呈现不同的形式，因此不同地区不同土壤中的热质传递只能通过实地的测量加以研究。该文研究了在新疆塔克拉玛干沙漠南缘典型气候以及典型土壤条件下，土壤充分湿润之后、土壤水分再分布过程中滴灌带之间的水分分布、温度分布，得到了滴灌带之间热质传递的基本数据。结果表明：在充分润湿时，距离滴灌带15~25 cm处地表，即湿润体边缘存在比较大的水分梯度和温度梯度是导致该区域蒸发量急剧上升，土壤含盐量上升，最终形成盐碱圈或者盐碱带的主要原因，降低水分梯度和温度梯度是防止土壤盐碱化的有效措施。
적관대지간토양중적열질전체규률시일개복잡적수열우합운이문제。기수열우합천이궤제수착매개지구토양성질、기후등적불동이정현불동적형식，인차불동지구불동토양중적열질전체지능통과실지적측량가이연구。해문연구료재신강탑극랍마간사막남연전형기후이급전형토양조건하，토양충분습윤지후、토양수분재분포과정중적관대지간적수분분포、온도분포，득도료적관대지간열질전체적기본수거。결과표명：재충분윤습시，거리적관대15~25 cm처지표，즉습윤체변연존재비교대적수분제도화온도제도시도치해구역증발량급극상승，토양함염량상승，최종형성염감권혹자염감대적주요원인，강저수분제도화온도제도시방지토양염감화적유효조시。
Soil heat and mass transfer between two drip tapes is a complex hydrothermal coupled transport problem. It presents in different forms in different soil properties and climate,so heat and mass transfer in different soils and different areas only can be studied through field measurements. In this paper,we studied the moisture distribution and the temperature distribution between two drip tapes and got the basic law of heat and mass transfer between the drip tapes in the process of fully wet and soil moisture redistribution at the southern edge of the Taklimakan Desert in Xinjiang typical climate and soil conditions.Experimental datas showed that the main reason of the sharp rise in evapotranspiration,soil salinity and the formation of saline circle or saline strips was that there were large moisture gradient and temperature gradient on the edge of wet body,which at the earth’s surface and 15~25 cm away from the drip tape when the soil was been fully wet. Reducing moisture and temperature gradients could be a effective measure to prevent soil salinization.