Arid
DOI10.1016/j.advwatres.2015.12.004
Differentiating between rain, snow, and glacier contributions to river discharge in the western Himalaya using remote-sensing data and distributed hydrological modeling
Wulf, Hendrik1,5; Bookhagen, Bodo1,2; Scherler, Dirk1,3,4
通讯作者Wulf, Hendrik
来源期刊ADVANCES IN WATER RESOURCES
ISSN0309-1708
EISSN1872-9657
出版年2016
卷号88页码:152-169
英文摘要

Rivers draining the southern Himalaya provide most of the water supply for the densely populated Indo-Gangetic plains. Despite the importance of water resources in light of climate change, the relative contributions of rainfall, snow and glacier melt to discharge are not well understood, due to the scarcity of ground based data in this complex terrain. Here, we quantify discharge sources in the Sutlej Valley, western Himalaya, from 2000 to 2012 with a distributed hydrological model that is based on daily, ground-calibrated re mote sensing observation. Based on the consistently good model performance, we analyzed the spatiotemporal distribution of hydrologic components and quantified their contribution to river discharge. Our results indicate that the Sutlej River’s annual discharge at the mountain front is sourced to 55% by effective rainfall (rainfall reduced by evapotranspiration), 35% by snow melt and 10% by glacier melt. In the high-elevation orogenic interior glacial runoff contributes similar to 30% to annual river discharge. These glacier melt contributions are especially important during years with substantially reduced rainfall and snowmelt runoff, as during 2004, to compensate for low river discharge and ensure sustained water supply and hydropower generation. In 2004, discharge of the Sutlej River totaled only half the maximum annual discharge; with 17.3% being sourced by glacier melt. Our findings underscore the importance of calibrating remote-sensing data with ground-based data to constrain hydrological models with reasonable accuracy. For instance, we found that TRMM (Tropical Rainfall Measuring Mission) product 3642 V7 systematically overestimates rainfall in arid regions of our study area by a factor of up to 5. By quantifying the spatiotemporal distribution of water resources we provide an important assessment of the potential impact of global warming on river discharge in the western Himalaya. Given the near-global coverage of the utilized remote-sensing datasets this hydrological modeling approach can be readily transferred to other data-sparse regions. (C) 2015 Elsevier Ltd. All rights reserved.


英文关键词Runoff modeling MODIS TRMM Mountain hydrology Sutlej River
类型Article
语种英语
国家Germany ; USA ; Switzerland
收录类别SCI-E
WOS记录号WOS:000371311800015
WOS关键词CHHOTA SHIGRI GLACIER ; ENERGY-BALANCE MODEL ; TEMPERATURE-INDEX ; CLIMATE-CHANGE ; HIMACHAL-PRADESH ; SOLAR-RADIATION ; SEDIMENT FLUX ; MODIS ; COVER ; RUNOFF
WOS类目Water Resources
WOS研究方向Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/190995
作者单位1.Univ Potsdam, Dept Earth & Environm Sci, Potsdam, Germany;
2.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA;
3.GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, Earth Surface Geochem, D-14473 Potsdam, Germany;
4.Free Univ Berlin, Inst Geol Sci, D-12249 Berlin, Germany;
5.Univ Zurich, Dept Geog, Remote Sensing Labs, Zurich, Switzerland
推荐引用方式
GB/T 7714
Wulf, Hendrik,Bookhagen, Bodo,Scherler, Dirk. Differentiating between rain, snow, and glacier contributions to river discharge in the western Himalaya using remote-sensing data and distributed hydrological modeling[J],2016,88:152-169.
APA Wulf, Hendrik,Bookhagen, Bodo,&Scherler, Dirk.(2016).Differentiating between rain, snow, and glacier contributions to river discharge in the western Himalaya using remote-sensing data and distributed hydrological modeling.ADVANCES IN WATER RESOURCES,88,152-169.
MLA Wulf, Hendrik,et al."Differentiating between rain, snow, and glacier contributions to river discharge in the western Himalaya using remote-sensing data and distributed hydrological modeling".ADVANCES IN WATER RESOURCES 88(2016):152-169.
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