摘要
以Fok和Bishop提出的下渗水形状系数计算公式为基础,通过整理并分析部分国内外已有的文献资料,提出了计算下渗水形状系数的简化公式和经验公式。根据水量平衡原理,通过引入地表储水形状系数和提出的公式所计算出的下渗水形状系数,建立了基于水量平衡原理的畦灌水流推进简化解析模型。结合已有文献资料和田间试验对模型进行检验,表明所提出计算下渗水形状系数的简化公式和经验公式是可靠的,以此建立的水流推进简化模型具有严谨的物理基础,且计算求解方便、精度较高,可用于畦灌合理灌水技术指标的确定。
This paper is based on the computation formula of infiltration figure coefficient which was put forward by Fok and Bishop. A simplified and empirical formula was brought forward after being reorganized and analyzed some domestic and foreign related references. On the basis of water balance model, a simplified analytic model of border irrigation is set up with the help of upper storage water coefficient. Testified by some research results and field experiments, it is shown that the model is reasonable and has some advantages, such as strict physical foundation, simple calculation and solution, higher accuracy. So it can be used to decide the reasonable technical indexes of border irrigation.
出处
《灌溉排水学报》
CSCD
北大核心
2008年第3期75-78,共4页
Journal of Irrigation and Drainage
基金
国家自然科学基金项目(50479052)
教育部青年教师资助计划课题(2003-108)
国家科技支撑计划课题(2006BAD11B04)
西北农林科技大学青年学术骨干计划资助课题
关键词
水量平衡模型
畦灌
下渗水形状系数
地表储水形状系数
解析解
water balance model
border irrigation
seepage water form factor
figure coefficient of surface storage
analytic solution
