CAJ | 학술논문

为了深入研究积雪覆盖边界条件下的土壤水分迁移规律,通过冬季野外土壤水分观测试验,利用土壤水动力学理论,建立了稳定积雪覆盖条件下季节性冻土水分迁移模型.研究结果表明,积雪覆盖土壤比裸地平均地温高出1 e ,土壤体积含水率(土壤剖面0~100 cm内)高出2%,体现了积雪覆盖不仅能够阻碍土壤热量散失,而且能保持土壤墒情;建立的水分迁移模型能够精准的模拟积雪覆盖条件下冻结土壤水分迁移动态,其相对平均误差仅为3151%.研究结果对于丰富和完善冻土水分迁移理论,解决春旱和冬小麦/冷拔0等问题具有重要的理论和实践意义.
위료심입연구적설복개변계조건하적토양수분천이규률,통과동계야외토양수분관측시험,이용토양수동역학이론,건립료은정적설복개조건하계절성동토수분천이모형.연구결과표명,적설복개토양비라지평균지온고출1 e ,토양체적함수솔(토양부면0~100 cm내)고출2%,체현료적설복개불부능구조애토양열량산실,이차능보지토양상정;건립적수분천이모형능구정준적모의적설복개조건하동결토양수분천이동태,기상대평균오차부위3151%.연구결과대우봉부화완선동토수분천이이론,해결춘한화동소맥/랭발0등문제구유중요적이론화실천의의.
@@@@For an in2depth study on the movement characteristics of soil moisture under the snow2covered boundary conditions, a moisture transfer model of the seasonal frozen soil under the stable snow2covered condit ions was established based on the field measurements of soil moisture in the w inter and the soil hydrodynamics theory. The results showed that the average tempera2 ture of soil covered w ith snow is 1 e higher than the bare soil and the w ater content of unit volume ( between 0 and 100 cm of the soil profile) is 2% higher, w hich suggested that the snow cover can not only prevent the loss of soil heat but also maintain the soil moisture content. The model can simulate accurately the transfer dynamics of frozen soil under the snow cover, and the relat ive average error is only 3. 51%. T he research results have important t heoretical and practical significances to improve the moisture transfer theory of frozen soil and to solve the spring drought and "cold draw ing" of w inter w heat problems.