畦灌灌水效果对土壤入渗参数的敏感性研究  

Research of the Sensitivity of Irrigation Performance to Infiltration Parameters Influences on Border

作　　者：雷国庆[1] 樊贵盛[1] LEI Guoqing FAN Guisheng(College of Water Resources Sciences and Engineering, Taiyuan University of Technology, Taiyuan 030024, Chin)

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024

出　　处：《人民黄河》2017年第6期138-141,148,共5页Yellow River

基　　金：国家自然科学基金资助项目(40671081);山西省科技攻关项目(20100311124)

摘　　要：为分析不同土壤入渗能力下的畦灌灌水效果差异,以汾东灌区北长寿试验点的灌水试验为依托,建立灌水技术参数优化模型对灌区的灌水条件进行优化。在优化灌水条件下,选用修正后的Kostiakov入渗模型,以土壤水分入渗参数k、a和f0为自变量,通过正交试验的方法,利用Win SRFR软件对灌水效果指标灌水效率Ea、灌水均匀度Du进行模拟,并对模拟结果进行方差和贡献率分析,结果表明:对于指标E_a和D_u,入渗参数影响显著,其贡献率由大到小均为ρ(k)>ρ(f_0)>ρ(a)。在此基础上,结合灌水效果指标对各入渗参数变异的敏感系数,确定了入渗参数k、a和f0综合变异时灌水效果指标偏离程度的量化形式,为土壤入渗能力空间变异时灌水效果指标精度控制提供依据。In order to analyze the different border irrigation water effects under different soil water infiltration capacities, using the irrigation experiment in Beichangshou of the eastern Fenhe River irrigation district as an example, the paper established irrigation technical parameters optimization model for irrigation condition optimized. Under the conditions of optimized irrigation, and using the modified Kostiakov infiltration model, through the orthogonal experiment, taking soil infiltration parameters k,a and f0 as independent variable factor, it used WinSRFR software to simulate irrigation efficiency Ea, irrigation uniformity effect index Du , and analyzed the variance and contribution. The results show that for the index of and Du, infiltration parameters affect significantly and its contribution rate from large to small is ρ（k） 〉ρ （ f0） 〉ρ（ a ） .On this basis, combining with the effect of irrigation index sensitive to the infiltration parameters variation coefficient, it chooses the infiltration parameters k, a and f0 as comprehensive variable, to quantify the degree of deviation variable irrigation effects and to provide the basis for irrigation effects index accuracy control about soil infiltration capacity spatial variation.

关 键 词：畦灌 土壤水分入渗参数 灌水效果 正交试验设计 敏感系数 

分 类 号：S274.1[农业科学—农业水土工程]