基于水量平衡原理的畦灌水流推进简化解析模型研究  

Simplified analytic model of border irrigation water movement based on water balance principle

作　　者：聂卫波[1] 马孝义[1] 幸定武[1] 赵文举[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,杨凌712100

出　　处：《农业工程学报》2007年第1期82-85,共4页Transactions of the Chinese Society of Agricultural Engineering

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);西北农林科技大学青年学术骨干计划资助课题

摘　　要：畦灌水流推进过程计算模型对确定灌水技术要素、田间平均入渗率和糙率有十分重要的作用。该文依据水量平衡模型,分析畦灌下渗水形状系数、地表储水形状系数的变化规律,结果表明下渗水形状系数受地表水推进过程中的推进距离和时间的幂指数影响很小,可用一个稳定值代替,由此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,表明该模型具有计算求解方便、精度较高的优点,可用于畦灌合理灌水技术指标的确定。Border irrigation current advancement process model plays an important role to determine irrigation technical index, average field infiltration rate and roughness coefficient. Based on water balance model, the change of figure coefficients of infiltration water and surface water storage under border irrigation was analyzed. The power index of movement distance and time has little influence on the figure coefficient of infiltration water in the course of surface water movement, which can be substituted by a stable value. A simplified analytic model of border irrigation on the basis of water balance principle was set up and testified by some research results and field experiments. Results show that the model is simple and accurate, which can be used to determine the reasonable technical index of border irrigation.

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 

分 类 号：S275.3[农业科学—农业水土工程]