| 来源类型 | Article
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| 规范类型 | 其他
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| DOI | 10.1016/j.scitotenv.2016.01.001
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| An appraisal of precipitation distribution in the high-altitude catchments of the Indus basin. |
| Dahri ZH; Ludwig F; Moors E; Ahmad B; Khan A; Kabat P
|
| 发表日期 | 2016
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| 出处 | Science of the Total Environment 548-9: 289-306
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| 出版年 | 2016
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| 语种 | 英语
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| 摘要 | Scarcity of in-situ observations coupled with high orographic influences has prevented a comprehensive assessment of precipitation distribution in the high-altitude catchments of Indus basin. Available data are generally fragmented and scattered with different organizations and mostly cover the valleys. Here, we combine most of the available station data with the indirect precipitation estimates the accumulation zones of major glaciers to analyse altitudinal dependency of precipitation in the high-altitude Indus basin. The available observations signified the importance of orography in each sub-hydrological basin but could not infer an accurate distribution of precipitation with altitude. We used Kriging with External Drift (KED) interpolation scheme with elevation as a predictor to appraise spatiotemporal distribution of mean monthly, seasonal and annual precipitation for the period of 1998-2012. The KED-based annual precipitation estimates are verified by the corresponding basin-wide observed specific runoffs, which show good agreement. In contrast to earlier studies, our estimates reveal substantially higher precipitation in most of the sub-basins indicating two distinct rainfall maxima; 1st along southern and lower most slopes of Chenab, Jhelum, Indus main and Swat basins, and 2nd around north-west corner of Shyok basin in the central Karakoram. The study demonstrated that the selected gridded precipitating products covering this region are prone to significant errors. In terms of quantitative estimates, ERA-Interim is relatively close to the observations followed by WFDEI and TRMM, while APHRODITE gives highly underestimated precipitation estimates in the study area Basin-wide seasonal and annual correction factors introduced for each gridded dataset can be useful for lumped hydrological modelling studies, while the estimated precipitation distribution can serve as a basis for bias correction of any gridded precipitation products for the study area. |
| 主题 | Water (WAT)
; Directorate (DIR)
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| 关键词 | Indus basin
precipitation distribution
high-altitude areas
gridded precipitation products
bias correction
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| URL | http://pure.iiasa.ac.at/id/eprint/11829/
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| 来源智库 | International Institute for Applied Systems Analysis (Austria)
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| 引用统计 |
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| 资源类型 | 智库出版物
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| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/130486
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推荐引用方式
GB/T 7714 |
Dahri ZH,Ludwig F,Moors E,et al. An appraisal of precipitation distribution in the high-altitude catchments of the Indus basin.. 2016.
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An%20appraisal%20of%20precipitation%20distribution%20in%20the%20high-altitude%20catchments%20of%20the%20Indus%20basin.pdf
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