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Influences of Topographic Shadows on the Thermal and Hydrological Processes in a Cold Region Mountainous Watershed in Northwest China
Zhang, YL (Zhang, Y. L.)1; Li, X (Li, X.)2,3; Cheng, GD (Cheng, G. D.)3,4,5; Jin, HJ (Jin, H. J.)4,6; Yang, DW (Yang, D. W.)7; Flerchinger, GN (Flerchinger, G. N.)8; Chang, XL (Chang, X. L.)1; Wang, X (Wang, X.)1; Liang, J (Liang, J.)1
Source PublicationJOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
2018-07-01
Volume10Issue:7Pages:1439-1457
DOI10.1029/2017MS001264
AbstractThe solar radiation incident in a mountainous area with a complex terrain has a strong spatial heterogeneity due to the variations in slope orientation (self-shading) and shadows cast by surrounding topography agents (topographic shading). Although slope self-shading has been well studied and considered in most land surface and hydrological models, topographic shading is usually ignored, and its influence on the thermal and hydrological processes in a cold mountainous area remains unclear. In this study, a topographic solar radiation algorithm with consideration for both slope self-shading and topographic shadows has been implemented and incorporated into a distributed hydrological model with physically based descriptions for the energy balance. A promising model performance was achieved according to a vigorous evaluation. In a control model without considering the topographic shadows, the simulated solar radiation incident in the study area was about 14.3W/m(2) higher on average, which in turn led to a higher simulated annual mean ground temperature at 4m (by 0.41 degrees C) and evapotranspiration (by 16.1mm/a), and a smaller permafrost extent (reduced by about 8%), as well as smaller maximal snow depth and shorter snow duration. Although the simulation was not significantly improved for discharge hydrograph in the base model, higher river runoff peaks and an increased runoff depth were obtained. In areas with a rugged terrain and deep valleys, the influences of topographic shadows would even be stronger in reality than the presented results, which cannot be ignored in the simulation of the thermal and hydrological processes, especially in a refined model.
WOS IDWOS:000441886300004
Language英语
Indexed BySCIE
KeywordHEIHE RIVER-BASIN WIRELESS SENSOR NETWORK SOLAR-RADIATION MODEL QINGHAI-TIBET PLATEAU SKY-VIEW FACTOR LAND-SURFACE SIMULTANEOUS HEAT FROZEN SOIL REFERENCE EVAPOTRANSPIRATION COMPLEX TOPOGRAPHY
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
Cooperation Status国际
ISSN1942-2466
Department大数据中心
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8604
Collection图书馆
Affiliation1.Hunan Univ Sci & Technol, Natl Local Joint Engn Lab Geospatial Informat Tec, Xiangtan, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China;
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
4.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Gansu, Peoples R China;
5.[Cheng, G. D.] Shanghai Normal Univ, Inst Urban Study, Shanghai, Peoples R China;
6.Harbin Inst Technol, Sch Civil Engn, Harbin, Heilongjiang, Peoples R China;
7.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing, Peoples R China;
8.USDA ARS, Northwest Watershed Res Ctr, Boise, ID 83712 USA.
Recommended Citation
GB/T 7714
Zhang, YL ,Li, X ,Cheng, GD ,et al. Influences of Topographic Shadows on the Thermal and Hydrological Processes in a Cold Region Mountainous Watershed in Northwest China[J]. JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,2018,10(7):1439-1457.
APA Zhang, YL .,Li, X .,Cheng, GD .,Jin, HJ .,Yang, DW .,...&Liang, J .(2018).Influences of Topographic Shadows on the Thermal and Hydrological Processes in a Cold Region Mountainous Watershed in Northwest China.JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,10(7),1439-1457.
MLA Zhang, YL ,et al."Influences of Topographic Shadows on the Thermal and Hydrological Processes in a Cold Region Mountainous Watershed in Northwest China".JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS 10.7(2018):1439-1457.
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