基于winSRFR河套灌区小麦不同面积不同生育期的入渗参数和糙率的研究

A Study on Infiltration Parameters and Roughness of Wheat in Different Area and Growth Period in Hetao Irrigation District Based on win SRFR

为了研究小麦不同生育期土壤入渗参数和田面糙率的规律,采用国内外学者对测定土壤入渗参数和田面糙率的方法和模型,根据春小麦不同生育期的水流推进和消退的实测数据,借助win SRFR模型,通过模拟灌溉过程,总结了河套灌区小麦不同畦田面积不同生育期的入渗参数和糙率的规律。结果表明:1春小麦田面糙率的变化范围为0.12~0.17;入渗系数的变化范围为47.78~75.03 mm/hα;入渗指数的变化范围为0.26~0.57。2田面糙率的变化规律总体表现为灌浆期>分蘖期>孕穗期>拔节期,春小麦入渗参数随着小麦生育期逐渐减小,其规律为分蘖期>拔节期>孕穗期>灌浆期。3数据经Sigmaplot显著性分析得出:入渗参数各生育期互相都有显著差异,而糙率在各个生育期除了孕穗期与分蘖期和拔节期无显著性差异其他都有显著差异。

In order to study the law of soil infiltration parameters and roughness in different growth period of wheat,using the measurement methods and models for soil infiltration parameters and roughness proposed by domestic and abroad scholars,according to the measured data of water advance and recession in different growth period of wheat,with the help of win SRFR model,through simulating the irrigation process,this paper summarizes the law of soil infiltration parameters and roughness in Hetao irrigation district in different area and growth period of wheat. The results shows that： 1 The variation range of spring wheat field surface roughness is 0. 12 ～ 0. 17,the variation range of spring wheat field Infiltration coefficient is 47. 78 ～ 75. 03 mm / hα,and the variation range of spring wheat infiltration index is 0. 26 ～ 0. 57.2The order of surface roughness variation from high to low is filling stage,tillering stage,booting stage,jointing stage. The infiltration parameters of spring wheat decreases gradually with wheat grown stage,the order from high to low is tillering stage,jointing stage,booting stage,filling stage. 3According to the data analysis by Sigmaplot,it can be found that infiltration parameters have significant differences in each different growth period,while the roughness have significant differences in different growth stages except for booting stage,tillering stage and jointing stage.