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DOI10.1029/2018WR023576
Spatial Variability and Temporal Persistence of Event Runoff Coefficients for Cropland Hillslopes
Chen, Bo1,2; Krajewski, Witold F.3; Helmers, Matthew J.4; Zhang, Zhuodong1,2
2019-02-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2019
卷号55期号:2页码:1583-1597
文章类型Article
语种英语
国家Peoples R China; USA
英文摘要

Using data collected from collocated hillslopes in central Iowa, the United States, the authors (1) explored the spatial variability of runoff coefficient at the event scale by examining the relationships between the standard deviation and coefficient of variation of runoff coefficient and the mean and (2) analyzed the temporal persistence of spatial pattern of runoff coefficient using Spearman rank and Pearson correlation coefficient. This study considered 12 cropland hillslopes with 0-20% native prairie vegetation coverage distributed at different hillslope locations. Seventy runoff events over the period 2008-2011 were investigated, of which 51 occurred during crop active growing season, when the hydrologic responses of crops and prairie vegetation are similar. For these events, the spatial coefficient of variation had a median value of 0.80, which indicate high variation of event-scale runoff coefficients across neighboring hillslopes. This spatial variation largely cannot be consistently explained by the individual hillslope structural properties investigated. The standard deviation and mean of runoff coefficient showed a convex upward relationship across the range of runoff coefficients, with the maximum standard deviation value at the mean runoff coefficient of about 0.48. The coefficient of variation exponentially decreased with increasing runoff coefficient. For 71% of the cases, the results of both correlation analyses were statistically significant (p0.05), which indicate stable spatial pattern of runoff coefficient across events. This temporal persistence could be disrupted under extremely dry and wet conditions. The spatial variation-mean empirical relation and the temporal persistence of spatial pattern provide insight for parameterizing spatial variability of runoff coefficient in distributed hydrologic models.


英文关键词runoff coefficient spatial variability temporal persistence spatial pattern hillslope
领域资源环境
收录类别SCI-E
WOS记录号WOS:000461858900037
WOS关键词SURFACE-SOIL-MOISTURE ; PRAIRIE FILTER STRIPS ; SCALE-DEPENDENCE ; STABILITY ; PATTERNS ; RAINFALL ; WATER ; MODEL ; CATCHMENTS ; REMOVAL
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/181308
专题资源环境科学
作者单位1.Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ, Fac Geog Sci, Beijing, Peoples R China;
2.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China;
3.Univ Iowa, IIHR Hydrosci & Engn, Iowa City, IA USA;
4.Iowa State Univ, Dept Agr & Biosyst Engn, Ames, IA USA
推荐引用方式
GB/T 7714
Chen, Bo,Krajewski, Witold F.,Helmers, Matthew J.,et al. Spatial Variability and Temporal Persistence of Event Runoff Coefficients for Cropland Hillslopes[J]. WATER RESOURCES RESEARCH,2019,55(2):1583-1597.
APA Chen, Bo,Krajewski, Witold F.,Helmers, Matthew J.,&Zhang, Zhuodong.(2019).Spatial Variability and Temporal Persistence of Event Runoff Coefficients for Cropland Hillslopes.WATER RESOURCES RESEARCH,55(2),1583-1597.
MLA Chen, Bo,et al."Spatial Variability and Temporal Persistence of Event Runoff Coefficients for Cropland Hillslopes".WATER RESOURCES RESEARCH 55.2(2019):1583-1597.
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