Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019907 |
Impacts of precipitation and potential evapotranspiration patterns on downscaling soil moisture in regions with large topographic relief | |
Cowley, Garret S.1; Niemann, Jeffrey D.1; Green, Timothy R.2; Seyfried, Mark S.3; Jones, Andrew S.4; Grazaitis, Peter J.5 | |
2017-02-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Soil moisture can be estimated at coarse resolutions (>1 km) using satellite remote sensing, but that resolution is poorly suited for many applications. The Equilibrium Moisture from Topography, Vegetation, and Soil (EMT+VS) model downscales coarse-resolution soil moisture using fine-resolution topographic, vegetation, and soil data to produce fine-resolution (10-30 m) estimates of soil moisture. The EMT+VS model performs well at catchments with low topographic relief (<= 124 m), but it has not been applied to regions with larger ranges of elevation. Large relief can produce substantial variations in precipitation and potential evapotranspiration (PET), which might affect the fine-resolution patterns of soil moisture. In this research, simple methods to downscale temporal average precipitation and PET are developed and included in the EMT+VS model, and the effects of spatial variations in these variables on the surface soil moisture estimates are investigated. The methods are tested against ground truth data at the 239 km(2) Reynolds Creek watershed in southern Idaho, which has 1145 m of relief. The precipitation and PET downscaling methods are able to capture the main features in the spatial patterns of both variables. The space-time Nash-Sutcliffe coefficients of efficiency of the fine-resolution soil moisture estimates improve from 0.33 to 0.36 and 0.41 when the precipitation and PET downscaling methods are included, respectively. PET downscaling provides a larger improvement in the soil moisture estimates than precipitation downscaling likely because the PET pattern is more persistent through time, and thus more predictable, than the precipitation pattern. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398568800031 |
WOS关键词 | MEAN AREAL PRECIPITATION ; AIR-TEMPERATURE ; SPATIAL-DISTRIBUTION ; CATCHMENT-SCALE ; HIGH-RESOLUTION ; WATER CONTENT ; TERRAIN ; EVAPORATION ; VEGETATION ; RAINFALL |
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/20472 |
专题 | 资源环境科学 |
作者单位 | 1.Colorado State Univ, Dept Civil & Environm Engn, Ft Collins, CO 80523 USA; 2.USDA, Ctr Agr Resources Res, Agr Res Serv, Ft Collins, CO USA; 3.USDA, Northwest Watershed Res Ctr, Agr Res Serv, Boise, ID USA; 4.Colorado State Univ, Cooperat Inst Res Atmosphere, Ft Collins, CO USA; 5.US Army Res Dev & Engn Command, Army Res Lab, Adelphi, MD USA |
推荐引用方式 GB/T 7714 | Cowley, Garret S.,Niemann, Jeffrey D.,Green, Timothy R.,et al. Impacts of precipitation and potential evapotranspiration patterns on downscaling soil moisture in regions with large topographic relief[J]. WATER RESOURCES RESEARCH,2017,53(2). |
APA | Cowley, Garret S.,Niemann, Jeffrey D.,Green, Timothy R.,Seyfried, Mark S.,Jones, Andrew S.,&Grazaitis, Peter J..(2017).Impacts of precipitation and potential evapotranspiration patterns on downscaling soil moisture in regions with large topographic relief.WATER RESOURCES RESEARCH,53(2). |
MLA | Cowley, Garret S.,et al."Impacts of precipitation and potential evapotranspiration patterns on downscaling soil moisture in regions with large topographic relief".WATER RESOURCES RESEARCH 53.2(2017). |
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