河套灌区畦田内不同位置土壤入渗特性及影响因素分析  

Analysis of Soil Infiltration Characteristics and Influencing Factors at Different Locations in Fields at Hetao Irrigation District

作　　者：孙娜 李瑞平[1] 苗庆丰[1] 范雷雷 周利颖 李聪聪 SUN Na;LI Rui-ping;MIAO Qing-feng;FAN Lei-lei;ZHOU Li-ying;LI Cong-cong(College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《节水灌溉》2022年第2期1-6,共6页Water Saving Irrigation

基　　金：“十三五”国家重点研发计划项目(2016YFC0400205-01);国家自然科学基金项目(51769021,51839006)。

摘　　要：为明确河套灌区畦田田块不同位置土壤的入渗特性,通过野外试验和室内检测对试验区田块不同位置土壤理化性质和入渗过程进行分析,并基于土壤入渗模型对试验区田块不同位置的土壤入渗过程进行拟合,同时探讨影响土壤入渗过程的影响因素。研究结果表明:试验区田块内不同位置土壤理化性质及入渗特性具有一定差异性且不同位置土壤入渗特性与土壤理化性质之间具有一定联系,畦首的初始入渗率分别是畦中和畦尾的1.42和1.81倍;入渗系数和稳定入渗率呈现畦首>畦尾>畦中的变化特征,累积入渗量与初始入渗率呈现畦首>畦中>畦尾的变化特征;选用的4种土壤入渗模型中Horton模型模拟参数反映的结果与实测值的偏差较小,更适宜于描述本试验区田块内土壤的入渗过程。In order to clarify the infiltration characteristics of the soil at different locations in the field at Hetao Irrigation District,the infiltration process of the soil at different locations in the experimental area were analyzed based on the soil infiltration model to fit the infiltration process.The results show that infiltration characteristics of soil at different locations are closely related with its physical and chemical properties;the infiltration rate of the head of border is 1.42 and 1.81 times of that of the middle and the tail of border,respectively.The infiltration coefficient and the stable infiltration rate show the change characteristics of the head of the border>the tail of the border>the middle of the border,and the cumulative infiltration volume and the initial infiltration rate show the change characteristics of the head of the border>the middle of the border>the tail of the border.The results also show that Horton model simulation parameters have a smaller deviation from the measured values,and is suitable for describing the soil infiltration process in the field.

关 键 词：河套灌区 土壤入渗特性 土壤理化性质 入渗模型 畦田位置 畦首 畦中 畦尾 

分 类 号：S2[农业科学—农业工程]