摘要
根据土壤水动力学基本原理,建立了秸秆覆盖条件下夏玉米SPAC系统中二维土壤水分入渗模型,应用该模型采用ADI法对辽宁地区秸秆覆盖条件下玉米田间土壤水分入渗过程进行模拟计算。模拟结果再现田间土壤水分入渗过程,同时显示产流与未产流情况试验数据与模拟值均有较好的一致性,平均相对误差均在5%以内,所构建模型可用于覆盖条件下土壤水分运动规律的研究。
Base on soil water dynamic equations,the two-dimensional model of soil water infiltration was established to simulate soil water infiltration under full straw mulch.By alternating direction implicit algorithm for these models,the simulations of soil water infiltration were performed under full straw mulch at corns in the Liaoling province.The dynamic changes of soil moisture of field process were appeared by the numerical simulation on rainfall infiltration through the soil.The results showed that simulated values agreed with the observed values,and the average relative error between simulated and observed values was below 5%.The two-dimensional model of soil water infiltration can be used to research on movement of soil moisture under straw mulch.
出处
《灌溉排水学报》
CSCD
北大核心
2012年第4期127-130,共4页
Journal of Irrigation and Drainage
基金
国家自然科学基金青年科学基金项目(51109037)
黑龙江省博士后资助项目(LBH-Z10247)
黑龙江教育厅科学技术研究项目
东北农业大学博士启动基金项目
关键词
秸秆覆盖
二维
土壤水入渗
数值模拟
straw mulch
two-dimensional
soil water infiltration
numerical simulation
