三峡库区紫色土水分入渗模型比较分析  

The Comparison between Kostiakov and Kostiakov-Lewis Infiltration Models from Purple Soil in the Three Gorge Reservoir Area

作　　者：熊友胜[1] 魏朝富[1] 何丙辉[1] 张卫华[1] 

机构地区：[1]西南大学资源环境学院/三峡库区生态环境教育部重点实验室,重庆400716

出　　处：《灌溉排水学报》2013年第1期43-46,90,共5页Journal of Irrigation and Drainage

基　　金：国家水体污染控制与治理科技重大专项课题(2012ZX07104-003);国家自然科学基金项目(40971166)

摘　　要：基于重庆开县石碗小流域坡耕地土壤水分入渗观测试验数据,运用Origin8.0分析软件对Kostiakov和Kostiakov-Lewis模型进行曲线拟合,同时选用蒋定生公式与之对比分析,从拟合曲线特征和拟合参数取值上分析二种模型的差异。结果表明,①Kostiakov模型和Kostiakov-Lewis模型2条拟合曲线不重合;而Kostiakov-Lewis模型与蒋定生公式的拟合曲线基本重合,其决定系数(R2)、参数(b、fc)的取值及标准误差完全相同。②Kostiakov模型和Kostiakov-Lewis模型中参数(a、b)取值不同,且b取值变化范围也完全不同,Kostiakov模型中b取值0.40～0.69,Kostiakov-Lewis模型中b取值0.29～1.59,差异明显。③Kostiakov模型中参数(a、b)物理意义明确,而Kostiakov-Lewis模型中参数(a、b)没有明确的物理意义。可见,Kostiakov模型和Kostiakov-Lewis模型是2个完全不同的入渗模型,而Kostiakov-Lewis模型和蒋定生公式实质上完全相同。Based on the soil infiltration data of slope farmland with double-ring method at shiwan watershed in Kaixian County, Chongqing, Origin 8.0 was used to make the curve fitted by Kostiakov and Kostiakov- Lewis models compared with Jiangding-sheng~ s formula. From the curve characteristics and parameters, the two models were compared. The results showed that： @Kostiakov curve and Kostiakov-Lewis curve did not coincide, however, Kostiakov-Lewis and Jiangdingsheng formula basically coincided, with their de- termination coefficient （R2） , the values of parameters （b, fc） and their standard errors being exactly same. @the parameters （a,b） in these two models were different; The ranges of parameter b were also totally different in these two models, and the difference was quite clear. @the physical meaning of the parameter （a,b） in Kostiakov model was meaningful, however, in Kostiakov-Lewis model there was no clear physical meanings. So, Kostiakov model and Kostiakov-Lewis model are totally two different models, and in fact Kostiakov-Lewis is the same with Jiangdingsheng^s model.

关 键 词：Kostiakov模型 Kostiakov-Lewis模型 差异 拟合参数 

分 类 号：S157.1[农业科学—土壤学]