【作者】 刘长贵；

【导师】 徐存东；

【作者基本信息】 兰州理工大学 ， 流体机械及工程， 2011， 硕士

【摘要】 本课题基于灌区三种质地,四种渠道类型的冻结,非冻结渠道土壤入渗试验,系统的研究了渠道土壤的入渗特性,阻渗机理和影响渠道土壤入渗特性的主要因素；建立了以灌溉期间土壤物理参数预测土壤入渗能力和入渗模型参数的模型,提出了预测渠道土壤入渗过程的方法；分析研究了渠道输水损失的特性。建立了渠道输水损失的计算公式,为预测渠道输水损失提供了新的方法。表明了渠道土壤入渗能力与土壤水分入渗模型参数在冻结期,非冻结期有很大变化,但也有一定的变化规律。在冻结期,随着水压的增大入渗能力变化不是很大,但在非冻结期随着压力的增大土壤的入渗能力变化很大。影响渠道土壤入渗特性的因素有：土壤结构、土壤含水量、土壤质地、渠道水深、地温。渠道水深是导致土壤入渗的决定因素。土壤入渗能力随地温的升高逐渐增大,对入渗也有较大的影响。更多还原

【Abstract】 In this paper, based on the field infiltration tests into frozen and unfrozen soils with three species of soil texture and four kinds of channel type. The basin infiltration characteristics, reduction infiltration mechanism and major factors influencing channel soils are put forward. the characteristics of channel conveyance loss are analyzed and studied, calculation formula of channel conveyance loss is set up, for the reasonable predict the channel conveyance loss to provide the theories method.Channel soil water infiltration capacities and parameters of soil water infiltration model make severe change in frozen and unfrozen. But have definite change law as well. Infiltration capacities have little difference, along with the augmentation of the water pressure during frozen, but infiltration capacities have much difference along with the augmentation of the water pressure in unfrozen.Soil structure, soil moisture, soil texture, channel depth of water and ground temperature are the major factors which influence the infiltration capacities of channel soil. Channel depth of water is the deterministic factor which result in soil infiltration, along with ground temperature, which have bigger influence for infiltration.更多还原