摘要
分三种土质,不同畦田规格进行畦灌灌水试验,研究水流推进、退水过程、田间入渗、单宽流量、纵坡等对灌水效率、均匀度的影响。结果表明,土质、计划湿润层深度、单宽流量、畦田规格、纵坡对灌水效率的影响非常明显,求得值与规范规定值(0.90以上)有很大差距;利用田间双环入渗实测法求出土壤入渗参数,再用kostiskov入渗公式计算累计入渗深度与入渗时间算得入渗水深均匀系数。计算结果发现入渗水深达0.74 m以上。对畦灌来说,高均匀系数与高灌水效率才意味着高灌水质量。
Field experiments were conducted in three soil types and various border sizes. This paper researches on the influences of water advance and recession, infiltration, unit discharge, slope etc. on the performance of application efficiency and distribution uniformity （Du）. Soil type, planned humidity layer depth and unit discharge and slope had very distinct influence on application efficiency. The calculated value was obviously different with normative value which was higher than 0. 9. Infiltration parameters（K and α） for Kostiakov＇s equation were estimated by a field double-ring infiltration road-test approach. Distribution uniformity for infiltrated depth was calculated with infiltration parameters and infiltration time. It was found that Du was higher than 0.74. The high Du value and high application efficiency mean high irrigated quality for border irrigation.
出处
《太原理工大学学报》
CAS
北大核心
2007年第6期543-546,共4页
Journal of Taiyuan University of Technology
基金
山西省第二次水资源评价与总体规划项目田间水利用系统专题研究
关键词
畦灌
水流特性
灌水效率
border irrigation
water flow performance
application efficiency
