畦灌土壤入渗参数的空间变异性及其对灌水质量的影响  

Spatial Variability of Infiltration Parameters and Its Influences on Border Irrigation Performance

作　　者：朱艳[1,2] 缴锡云[1] 王维汉[1,2] 王树仿[1,2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室 [2]河海大学农业工程学院,南京210098

出　　处：《灌溉排水学报》2009年第3期46-49,共4页Journal of Irrigation and Drainage

基　　金：国家自然科学基金资助项目(50679021);"十一五"国家科技支撑计划项目(2006BAD11B02);引进国际先进水利科学技术计划项目("948";200719)

摘　　要：针对畦灌,研究了Kostiakov模型入渗系数K和入渗指数α的空间变异性及其对灌水质量的影响。根据2008年在河北吴桥进行的棉花播前灌水试验数据,采用最优模式搜索技术估算土壤入渗参数并分析其空间变异性,进而采用地面灌溉模拟软件SRFR模拟了土壤入渗参数空间变异性对灌水质量的影响。结果表明,当其它灌水技术要素相同时,灌水均匀度和灌水效率对K和α的响应关系均为单峰型二次曲线。K的稳定区间较大,α的稳定区间较小,当二者在小值范围内变化时,灌水质量的波动较为平缓;当二者在大值范围内波动时,会引起灌水质量的急剧变化。因此,在畦灌设计过程中,土壤入渗参数的差异性不容忽视。Spatial variability of infiltration parameters K and a of Kostiakov model and influences on irrigation performance were studied for border irrigation. The border irrigation experiment was conducted at the cotton field of Wuqiao in Hebei before seeding in 2008, and the data observed by optimal model searching technique were used to describe the spatial variability of infiltration parameters. The software SRFR was used to simulate the influences of spatial variability on irrigation performance. The results show that the relationships between the irrigation distribution uniformity and irrigation efficiency and infiltration parameters （infiltration coefficient K and infiltration exponential a） are both conics with single peak, on condition of the other factors keeping the same. The steady area of K is smaller, and the a＇s is bigger. The irrigation performance fluctuates smoothly when the parameters fluctuated between lower area. And the irrigation performance fluctuates acutely when the parameters fluctuated on higher level. So the spatial variability of infiltration parameters can not be ignored when making border irrigation scheme.

关 键 词：畦灌 入渗参数 空间变异性 灌水质量 

分 类 号：S274.2[农业科学—农业水土工程]