黄土丘陵区安家沟流域土壤入渗特征空间变异的研究  

The spatial variability of soil infiltration at Anjiagou river basin in Loess hilly area

作　　者：高婵婵 余凯[2] 赵传燕[1] 高云飞[1] 乔雨[1] 谢欢欢[1] 

机构地区：[1]兰州大学生命科学学院草地农业生态系统国家重点实验室,兰州730000 [2]兰州大学资源与环境学院,兰州730000

出　　处：《干旱区资源与环境》2016年第4期90-95,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金重点项目(91025015)资助

摘　　要：以环刀法观测安家沟流域土壤的入渗过程,并测定土壤的理化性质。然后通过比较Horton、Kostiakov和Philip模型的模拟精度,确定利用Philip模型对土壤入渗进行模拟。根据标定原理,对Philip模型进行标定,并通过比较,选用标定效果更好的标定因子αA来标定模型。再利用土壤理化指标分别建立标定因子αA以及稳定入渗率A的转换函数,最后根据土壤理化性质的空间分布,利用已建立的转换函数,实现标定因子αA和稳定入渗率A的空间化。结果显示:初始含水量为0.1g/g时,αA在0.703~1.049mm/min^0.5之间;稳定入渗率在0.142~0.251mm/min之间。该研究实现了大尺度的土壤入渗的空间化。The research on soil water infiltration is of great significance because soil erosion is serious in Loess hilly area. The research was based on the single- ring method to measure soil water infiltration characteristics and the physical and chemical properties of the soil in Anjiagou river basin. Then by comparing accuracy of simulation of Horton,Kostiakov and Philip models,we chose Philip model based on scaling theory for simulating soil infiltration,then chose the better factor αAfor calibrating model. After that,physical and chemical indexes of soil were used to build conversion function of calibration factor αAand stable infiltration rate A respectively. It was good for accuracy requirements of the space with correlation coefficients being 0. 776 and 0. 809. Finally calibration factor αAand stable infiltration A were specialized according to the spatial distribution of soil physical and chemical properties and the conversion function establishment. The results showed that when the initial water content was 0. 1g / g,αAwas between 0. 703 - 1. 049 mm / min^0. 5,the calibration factor value at the upper slope was generally higher than that at the lower slope. Steady infiltration rate was between 0. 142 - 0. 251 mm / min,and the value in shady slope was generally higher than that in sunny slope.

关 键 词：Philip模型 标定理论 空间化 

分 类 号：S152.7[农业科学—土壤学]