Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023789 |
Effect of Digital Elevation Model Resolution on the Simulation of the Snow Cover Evolution in the High Atlas | |
Baba, Mohamed Wassim1; Gascoin, Simon1; Kinnard, Christophe2; Marchane, Ahmed3; Hanich, Lahoucine3 | |
2019-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:7页码:5360-5378 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Canada; Morocco |
英文摘要 | The snow melt from the High Atlas represents a crucial water resource for crop irrigation in the semiarid regions of Morocco. Recent studies have used assimilation of snow cover area data from high-resolution optical sensors to compute the snow water equivalent and snow melt in other mountain regions. These techniques however require large model ensembles, and therefore it is a challenge to determine the adequate model resolution that yields accurate results with reasonable computation time. Here we study the sensitivity of an energy balance model to the resolution of the model grid for a pilot catchment in the High Atlas. We used a time series of 8-m resolution snow cover area maps with an average revisit time of 7.5 days to evaluate the model results. The digital elevation model was generated from Pleiades stereo images and resampled from 8 to 30, 90, 250, 500, and 1,000 m. The results indicate that the model performs well from 8 to 250 m but the agreement with observations drops at 500 m. This is because significant features of the topography were too smoothed out to properly characterize the spatial variability of meteorological forcing, including solar radiation. We conclude that a resolution of 250 m might be sufficient in this area. This result is consistent with the shape of the semivariogram of the topographic slope, suggesting that this semivariogram analysis could be used to transpose our conclusion to other study regions. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481444700011 |
WOS关键词 | MOROCCAN HIGH-ATLAS ; WATER EQUIVALENT ; SOLAR-RADIATION ; SPATIAL-DISTRIBUTION ; MODIS IMAGES ; PYRENEES ; MAPS ; PARAMETERIZATION ; SENSITIVITY ; TOPOGRAPHY |
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/184833 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Toulouse, CNRS CNES INRA IRD UPS, Ctr Etud Spatiales Biosphere, Toulouse, France; 2.Unv Quebec Trois Rivieres, Ctr Rech Interact Bassin Versants Ecosyst Aquat R, Trois Rivieres, PQ, Canada; 3.Univ Cadi Ayyad, Fac Sci & Tech, Dept Sci Terre, Unite Associee CNRST URAC42,Lab Georessources, Marrakech, Morocco |
推荐引用方式 GB/T 7714 | Baba, Mohamed Wassim,Gascoin, Simon,Kinnard, Christophe,et al. Effect of Digital Elevation Model Resolution on the Simulation of the Snow Cover Evolution in the High Atlas[J]. WATER RESOURCES RESEARCH,2019,55(7):5360-5378. |
APA | Baba, Mohamed Wassim,Gascoin, Simon,Kinnard, Christophe,Marchane, Ahmed,&Hanich, Lahoucine.(2019).Effect of Digital Elevation Model Resolution on the Simulation of the Snow Cover Evolution in the High Atlas.WATER RESOURCES RESEARCH,55(7),5360-5378. |
MLA | Baba, Mohamed Wassim,et al."Effect of Digital Elevation Model Resolution on the Simulation of the Snow Cover Evolution in the High Atlas".WATER RESOURCES RESEARCH 55.7(2019):5360-5378. |
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