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土壤水分特征曲线测定中低吸力段数据的影响分析
Alternative TitleAnalysis of the Influence of Data Obtained at Low Suctions on Soil Water Retention Curve
王红兰; 唐翔宇; 宋松柏
Corresponding Author唐翔宇
2012
Source Publication灌溉排水学报
Volume31Issue:6Pages:56-59
Abstract

采用沙箱法与压力膜仪法分段测定坡耕地不同土层深度(0?10、10?20、20?30 cm)的土壤水分特征曲线,应用RETC软件拟合求得van Genuchten模型参数。由沙箱结合压力膜仪数据拟舍得到的全吸力范围曲线(log_(10) h?θ)类似于“S”形,而仅使用压力膜仪测得的高吸力段(log_(10) h>2)数据所获得的曲线并不表现出明显的“S”形特征。综合沙箱法和压力膜仪法二者的数据拟舍得到的滞留含水率大于仅使用压力膜仪数据拟合所得值。

Other AbstractIn this study, soil water contents of three soil horizons (0-10 cm, 10-20 cm and 20-30 cm) on a sloping farmland were measured by sand box method and pressure chamber method. The van Genuchten model (1980) was fitted to soil water retention data using RETC. The results showed that soil volumetric water content in the low suction range changed dramatically with the increase of suction, while chan- ging slowly in the high suction range. The shapes of SWRC were similar for different soil horizons. The obvious "S" shape of SWRC obtained from data measured using both a sand box and a pressure chamber was not observed when the data were obtained using only a pressure chamber. The fitted value of soil reidual water content (θr) was dose to the soil water content measured at a suction of 15 000 cm only when data at low suctions were included.
Keyword土壤水分特征曲线 压力膜仪法 沙箱法 Van Genuchten模型参数
Indexed ByCSCD
Language中文
CSCD IDCSCD:4751278
Funding Organization“十二五”国家科技支撑计划项目(2011BAC09B05);中国科学院“百人计划”择优支持项目(引进国外杰出人才计划);国家自然科学基金项目(41171372)
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6591
Collection山地表生过程与生态调控重点实验室
Recommended Citation
GB/T 7714
王红兰,唐翔宇,宋松柏. 土壤水分特征曲线测定中低吸力段数据的影响分析[J]. 灌溉排水学报,2012,31(6):56-59.
APA 王红兰,唐翔宇,&宋松柏.(2012).土壤水分特征曲线测定中低吸力段数据的影响分析.灌溉排水学报,31(6),56-59.
MLA 王红兰,et al."土壤水分特征曲线测定中低吸力段数据的影响分析".灌溉排水学报 31.6(2012):56-59.
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