Regional-scale variation and distribution patterns of soil saturated hydraulic conductivities in surface and subsurface layers in the loessial soils of China | |
Wang, YQ (Wang, Yunqiang)[ 1,2,3 ]; Shao, MA (Shao, Ming'an)[ 2 ]; Liu, ZP (Liu, Zhipeng)[ 3,4 ]; Horton, R (Horton, Robert)[ 5 ] | |
2013-04-22 | |
发表期刊 | JOURNAL OF HYDROLOGY |
卷号 | 487页码:13-23 |
文章类型 | 期刊论文 |
摘要 | Saturated hydraulic conductivity (K-s) is an important soil property that shows a high degree of spatial heterogeneity. There is a lack of research that investigates and determines Ks at a regional scale, due to the challenges associated with the required intensive sampling. To determine the closely correlated factors affecting K-s at a regional scale and to then generate a regional distribution map of K-s, we selected 382 sampling sites across the Loess Plateau of China (620,000 km(2)) and collected undisturbed and disturbed soil samples from two soil layers (0-5 and 20-25 cm). We found that both surface K-s and subsurface K-s had log(base 10)-normal distributions, and demonstrated strong spatial variability (CV = 206% and 135%, respectively). Surface LogK(s) was most closely correlated with LogSand, LogSilt, LogSG (slope gradient), LogSSWC (saturated soil water content), vegetation coverage and land use; while subsurface Logic was correlated with LogClay, SSWC, LogSG, LogAltitude, LogGY (growth year) and land use. Geostatistical analysis indicated that semivariograms of surface and subsurface Log K-s could be best fitted by an isotropic exponential model, with effective ranges of 204 km and 428 km, respectively. Distribution maps of K-s produced by kriging indicated a pronounced spatial pattern and demonstrated an obvious spatial depth gradient. The spatial distribution patterns of K-s at a regional scale in the loessial soils of China comprehensively reflected soil hydraulic properties and the combined effects of soil texture, vegetation, topography and human activities. |
关键词 | Land Use Soil Texture Principal Component Analysis Minimum Data Set Geostatistics Soil Hydraulic Conductivity |
DOI | 10.1016/j.jhydrol.2013.02.006 |
收录类别 | SCI ; EI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/10010 |
专题 | 生态环境研究室 |
通讯作者 | Shao, MA (Shao, Ming'an)[ 2 ] |
作者单位 | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, Shaanxi 710075, China; 2.Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences,Beijing 100101, China; 3.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources,Yangling 712100, China; 4.Agronomy Department, Iowa State University, Ames, IA 50011, USA |
推荐引用方式 GB/T 7714 | Wang, YQ ,Shao, MA ,Liu, ZP ,et al. Regional-scale variation and distribution patterns of soil saturated hydraulic conductivities in surface and subsurface layers in the loessial soils of China[J]. JOURNAL OF HYDROLOGY,2013,487:13-23. |
APA | Wang, YQ ,Shao, MA ,Liu, ZP ,&Horton, R .(2013).Regional-scale variation and distribution patterns of soil saturated hydraulic conductivities in surface and subsurface layers in the loessial soils of China.JOURNAL OF HYDROLOGY,487,13-23. |
MLA | Wang, YQ ,et al."Regional-scale variation and distribution patterns of soil saturated hydraulic conductivities in surface and subsurface layers in the loessial soils of China".JOURNAL OF HYDROLOGY 487(2013):13-23. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Regional-scale varia(1008KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论