摘要
以往对于沟灌入渗研究多是基于自由入渗,而对沟灌交汇入渗的研究较少,沟灌交汇入渗试验因受较多因素影响,相对复杂。为了更加方便地研究沟灌交汇入渗规律,以土壤水动力学原理为基础,研究了沟灌交汇入渗下土壤水分运动规律,建立了沟灌交汇入渗的二维入渗模型。并通过试验对模型进行了检验,以中壤土为例,试验验证了累积入渗量和湿润锋运移位置的合理性,模型计算与试验结果吻合较好,表明所建立的模型是可靠的。这为进一步研究沟灌交汇入渗规律打下了基础。
The previous researches on furrow irrigation are almost upon free infiltration but less upon interference infiltration, as the interference infiltration is relatively complex and influenced by many factors. To more conveniently investigate the interfer- ence infiltration role of furrow irrigation, based on soil - water dynamics, we study soil moisture motion law under condition of furrow irrigation interference infiltration, and establish 2 - D infiltration model of furrow irrigation interference infiltration. The model is verified by test. Taking the medium loam as an example, we verify the correctness of accumulative infiltration amount and wetting front of water movement ; the model calculative results fit well with test, which illustrates that the established model is reliable. The model lays a solid foundation for further research of furrow irrigation interference infiltration.
出处
《人民长江》
北大核心
2010年第11期102-105,共4页
Yangtze River
关键词
交汇入渗
数值模拟
沟灌
地面灌溉
interference infiltration
numerical simulation
furrow irrigation
ground irrigation
