Effects of infiltration time on the calculated sorptivity with White method for a sandy loam soil
文献类型：期刊论文
| 作者 | Hu, Wei5; Wang, Quanjiu3,4; Shao, Mingan1; Ju, Zhengshan2 |
| 刊名 | AFRICAN JOURNAL OF AGRICULTURAL RESEARCH
 |
| 出版日期 | 2011-09-19 |
| 卷号 | 6期号:19页码:4601-4606 |
| 关键词 | Disc Infiltrometer Philip Sorptivity Sandy Loam Soil |
| 文献子类 | Article |
| 英文摘要 | Sorptivity (S) is one of the important soil hydraulic parameters, which can be estimated by disc infiltration data at the early stage with one dimensional infiltration theory. With the purpose of understanding the effects of infiltration time (IT) on the estimated S, two sizes (radius of 5 and 2.5 cm) of disc infiltrometer were used to perform disc infiltration under five pressure heads (0, -3, -6, -9, -15 cm) using a packed sandy loam soil. S values for different IT were estimated with White method. Results showed that the estimated S was in general overestimated and it increased with the increase of IT. The relative measurement error as compared with the Parlange method increased with the increase of IT, a behavior that could be well fitted by a logarithmic function. There was a tendency that the relative measurement error decreased with the decrease of pressure head, and the optimized value of IT (IT(OP)) in general increased exponentially with decreasing pressure head, ranging from 20 to 75 s for disc radius of 5 cm and 8 to 26 s for disc radius of 2.5 cm. The estimated S values and relative measurement errors for smaller disc were greater than those of larger disc. Attentions should be given to the suitable IT for determining S by White method. Furthermore, the relatively larger disc size should be preferred under the premise of a good hydraulic contact between disc and soil surface. |
| WOS关键词 | HYDRAULIC CONDUCTIVITY ; TENSION INFILTROMETERS ; DISK PERMEAMETERS ; UNSATURATED SOILS ; TRANSIENT FLOW ; EQUATION |
| 语种 | 英语 |
| WOS记录号 | WOS:000298784000024 |
| 出版者 | ACADEMIC JOURNALS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/68003]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Shao, Mingan |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Minist Land & Resources, Land Consolidat & Rehabil Ctr, Beijing 10035, Peoples R China 3.NW A&F Univ, Minist Water Resource, Yangling 712100, Shaanxi, Peoples R China 4.Chinese Acad Sci, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Surface Proc, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Wei,Wang, Quanjiu,Shao, Mingan,et al. Effects of infiltration time on the calculated sorptivity with White method for a sandy loam soil[J]. AFRICAN JOURNAL OF AGRICULTURAL RESEARCH,2011,6(19):4601-4606. |
| APA | Hu, Wei,Wang, Quanjiu,Shao, Mingan,&Ju, Zhengshan.(2011).Effects of infiltration time on the calculated sorptivity with White method for a sandy loam soil.AFRICAN JOURNAL OF AGRICULTURAL RESEARCH,6(19),4601-4606. |
| MLA | Hu, Wei,et al."Effects of infiltration time on the calculated sorptivity with White method for a sandy loam soil".AFRICAN JOURNAL OF AGRICULTURAL RESEARCH 6.19(2011):4601-4606. |
入库方式： OAI收割
来源：地理科学与资源研究所
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