摘要
运用水热耦合模型(SHAW)对秸秆覆盖厚度为5、10、15、20和30 cm下的季节性冻土中的水热迁移进行了模拟。结果表明:模型对土壤水分模拟效果较好,模拟期土壤水分模拟的标准误差RMSE为0.003~0.08 m^3/m^3。由于表层土壤易受外界气象条件变化的影响,模型对土壤温度模拟结果误差相对较大,但误差处于合理范围内。使用率定好的SHAW模型对秸秆覆盖厚度大于30 cm下的土壤水热运移进行了模拟预测,模拟结果表明当秸秆覆盖厚度≥45 cm时,秸秆覆盖下的土壤水热运移基本不受外界影响。
The water and heat migration in seasonal frozen soil with straw mulch thickness of 5,10,15,20 and 30 cm was simulated by using the Simultaneous Heat and Water(SHAW)model.The results showed that the model had a good effect on soil moisture simulation,and the root-mean-square error(RMSE)of soil moisture simulation during the simulation period was 0.003~0.08;as topsoil was easily affected by the external meteorological conditions,the model had relatively large error in the simulation results of soil temperature,but the error was within a reasonable range.The calibrated SHAW model was used to simulate and predict soil water and heat migration under straw mulch with thickness more than 30 cm,and the simulation results showed that the water and heat migration was almost unaffected by the external climate change when the thickness of straw mulching was more than 45 cm.
作者
魏一钊
陈军锋
高旭光
解雪
WEI Yi-zhao;CHEN Jun-feng;GAO Xu-guang;XIE Xue(College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《节水灌溉》
北大核心
2019年第12期27-31,共5页
Water Saving Irrigation
基金
国家自然科学基金面上项目(41572239)
国家自然科学青年基金项目(41502243)
山西省自然科学青年基金项目(2015021169)
关键词
SHAW模型
冻融期
水热运移
秸秆覆盖
模拟预测
SHAW model
freezing-thawing period
water and heat migration
straw mulch
simulation and prediction
