IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Spatial scale effect on seasonal streamflows in permafrost catchments on the Qinghai-Tibet Plateau
Wang, Genxu1; Liu, Guangsheng1,2; Liu, Lin'an1,2
Corresponding AuthorGenxu Wang
2012
Source PublicationHYDROLOGICAL PROCESSES
ISSN0885-6087
EISSN1099-1085
Volume26Issue:7Pages:973-984
SubtypeArticle
AbstractThe scale issue is of central concern in hydrological processes to understand the potential upscaling or downscaling methodologies, and to develop models for scaling the dominant processes at different scales and in different environments. In this study, a typical permafrost watershed in the Qinghai-Tibet Plateau was selected. Its hydrological processes were monitored for 4 years from 2004 to 2008, measuring the effects of freezing and thawing depth of active soil layers on runoff processes. To identify the nature and cause of variation in the runoff response in different size catchments, catchments ranging from 1.07 to 112 km2 were identified in the watershed. The results indicated that the variation of runoff coefficients showed a V shape with increasing catchment size during the spring and autumn seasons, when the active soil was subjected to thawing or freezing processes. A two-stage method was proposed to create runoff scaling models to indicate the effects of scale on runoff processes. In summer, the scaling transition model followed an exponential function for mean daily discharge, whereas the scaling model for flood flow exhibited a linear function. In autumn, the runoff process transition across multiple scales followed an exponential function with air temperature as the driving factor. These scaling models demonstrate relatively high simulation efficiency and precision, and provide a practical way for upscaling or downscaling runoff processes in a medium-size permafrost watershed. For permafrost catchments of this scale, the results show that the synergistic effect of scale and vegetation cover is an important driving factor in the runoff response. Copyright (C) 2011 John Wiley & Sons, Ltd.
KeywordRunoff Processes Spatio-temporal Variability Scale Effect Permafrost Watershed
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/hyp.8187
WOS Subject ExtendedWater Resources
Indexed BySCI
WOS KeywordEVENT RUNOFF COEFFICIENTS ; HYDROLOGY ; DYNAMICS ; REGION ; WATER ; LAYER ; FLOW
Language英语
Quartile3区
TOP
WOS SubjectWater Resources
WOS IDWOS:000302012900003
Funding OrganizationNatural Science Foundation of China(40730634 ; Chinese Academy of Sciences ; 40925002)
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6279
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 10039, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wang, Genxu,Liu, Guangsheng,Liu, Lin'an. Spatial scale effect on seasonal streamflows in permafrost catchments on the Qinghai-Tibet Plateau[J]. HYDROLOGICAL PROCESSES,2012,26(7):973-984.
APA Wang, Genxu,Liu, Guangsheng,&Liu, Lin'an.(2012).Spatial scale effect on seasonal streamflows in permafrost catchments on the Qinghai-Tibet Plateau.HYDROLOGICAL PROCESSES,26(7),973-984.
MLA Wang, Genxu,et al."Spatial scale effect on seasonal streamflows in permafrost catchments on the Qinghai-Tibet Plateau".HYDROLOGICAL PROCESSES 26.7(2012):973-984.
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