文献类型：期刊文献

英文题名：Extrapolative Capability of Two Models That Estimating Soil Water Retention Curve between Saturation and Oven Dryness

作者：Lu, Sen[1,2] Ren, Tusheng[3] Lu, Yili[3] Meng, Ping[1,2] Sun, Shiyou[4]

第一作者：陆森;Lu, Sen

通信作者：Ren, TS[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustaintable Forestry Sout, Nanjing 210037, Jiangsu, Peoples R China;[3]China Agr Univ, Dept Soil & Water, Beijing 100193, Peoples R China;[4]Hebei Acad Agr & Forestry Sci, Inst Agroresources & Environm, Shijiazhuang 050051, Peoples R China

年份：2014

卷号：9

期号：12

外文期刊名：PLOS ONE

收录：;Scopus(收录号：2-s2.0-84914695475);WOS:【SCI-EXPANDED(收录号:WOS:000345869700034)】；

基金：This study was funded by the Natural Science Foundation of China (No. 41371240), the Beijing Natural Science Foundation (No. 6133035), the Basic Research Fund of RIF (No. RIF2014-09), and the CFERN & GENE Award Funds on Ecological Paper. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The funders are not linked in any way to a profit making organization.

语种：英文

摘要：Accurate estimation of soil water retention curve (SWRC) at the dry region is required to describe the relation between soil water content and matric suction from saturation to oven dryness. In this study, the extrapolative capability of two models for predicting the complete SWRC from limited ranges of soil water retention data was evaluated. When the model parameters were obtained from SWRC data in the 0-1500 kPa range, the FX model (Fredlund and Xing, 1994) estimations agreed well with measurements from saturation to oven dryness with RMSEs less than 0.01. The GG model (Groenevelt and Grant, 2004) produced larger errors at the dry region, with significantly larger RMSEs and MEs than the FX model. Further evaluations indicated that when SWRC measurements in the 0-100 kPa suction range was applied for model establishment, the FX model was capable of producing acceptable SWRCs across the entire water content range. For a higher accuracy, the FX model requires soil water retention data at least in the 0- to 300-kPa range to extend the SWRC to oven dryness. Comparing with the Khlosi et al. (2006) model, which requires measurements in the 0-500 kPa range to reproduce the complete SWRCs, the FX model has the advantage of requiring less SWRC measurements. Thus the FX modeling approach has the potential to eliminate the processes for measuring soil water retention in the dry range.