隔畦交替灌溉灌水技术要素优化组合研究  

Optimization of Irrigation Technical Parameters Combination of Alternate Border Irrigation

作　　者：薄晓东[1] 薛景元 吴迪[1] 杜太生[1] 

机构地区：[1]中国农业大学中国农业水问题研究中心,北京100083

出　　处：《灌溉排水学报》2014年第4期118-122,共5页Journal of Irrigation and Drainage

基　　金：国家863计划课题(2011AA100505);国家自然科学基金项目(51222905);教育部"新世纪优秀人才支持计划"项目(NCET-11-0479)

摘　　要：为了优选隔畦交替灌溉灌水技术要素组合，利用室内土箱模拟研究了不同灌水量对水平侧渗和垂直入渗的影响。结果表明，砂壤土条件下，随灌水定额的增大，最大侧渗距离和垂直入渗深度均不断增大，而宽深比变化较小；随时间的延长，湿润锋形状逐渐发生变形，宽深比逐渐减小。当灌水定额为60～75mm时，适宜畦田宽度可设为1．5m。对于井灌区砂壤土，以灌水效率AE≥85％和灌水均匀度DU≥85％为控制目标，1‰田面坡度条件下，以畦长35m、单宽流量13．9L／（m·s）左右为宜。In order to get reasonable technical parameters combination of alternate border irrigation, the effects of different irrigation amounts on lateral and vertical infiltration of soil moisture were studied through laboratory experiment. The results indicated that the maximum distance of lateral and vertical infiltration increased with the increase of irrigation quota , but the width-depth ratio changed slightly; The shape of wetting front deformed and the width-depth ratio gradually decreased with the increase of infiltration time. The suitable border width was 1.5 m when the irrigation quota changed from 60 mm to 75 mm. With the control objectives of AE≥85% and DU≥85%, the optimal border length and inflow rate of unit width were 35 m and 13.9 L/（m · s） at border slope of 1‰ in well-irrigated area, respectively.

关 键 词：隔畦交替灌溉 侧渗 湿润锋 SRFR模型 灌水技术要素 

分 类 号：S275[农业科学—农业水土工程]