Partitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States
Abstract In this study, we combined two 1 km actual evapotranspiration datasets (ET), one obtained from a root zone water balance model and another from an energy balance model, to partition annual ET into green (rainfall-based) and blue (surface water/groundwater) sources. Time series maps of green...
Guardado en:
Autores principales: | , |
---|---|
Formato: | article |
Lenguaje: | EN |
Publicado: |
Nature Portfolio
2017
|
Materias: | |
Acceso en línea: | https://doaj.org/article/be542b82ea7b483a9ae16f924094eb37 |
Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
id |
oai:doaj.org-article:be542b82ea7b483a9ae16f924094eb37 |
---|---|
record_format |
dspace |
spelling |
oai:doaj.org-article:be542b82ea7b483a9ae16f924094eb372021-12-02T16:06:45ZPartitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States10.1038/s41598-017-06359-w2045-2322https://doaj.org/article/be542b82ea7b483a9ae16f924094eb372017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06359-whttps://doaj.org/toc/2045-2322Abstract In this study, we combined two 1 km actual evapotranspiration datasets (ET), one obtained from a root zone water balance model and another from an energy balance model, to partition annual ET into green (rainfall-based) and blue (surface water/groundwater) sources. Time series maps of green water ET (GWET) and blue water ET (BWET) are produced for the conterminous United States (CONUS) over 2001–2015. Our results indicate that average green and blue water for all land cover types in CONUS accounts for nearly 70% and 30% of the total ET, respectively. The ET in the eastern US arises mostly from GWET, and in the western US, it is mostly BWET. Analysis of the BWET in the 16 irrigated areas in CONUS revealed interesting results. While the magnitude of the BWET gradually showed a decline from west to east, the increase in coefficient of variation from west to east confirmed greater use of supplemental irrigation in the central and eastern US. We also established relationships between different hydro-climatology zones and their blue water requirements. This study provides insights on the relative contributions and the spatiotemporal dynamics of GWET and BWET, which could lead to improved water resources management.Naga Manohar VelpuriGabriel B. SenayNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017) |
institution |
DOAJ |
collection |
DOAJ |
language |
EN |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Naga Manohar Velpuri Gabriel B. Senay Partitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States |
description |
Abstract In this study, we combined two 1 km actual evapotranspiration datasets (ET), one obtained from a root zone water balance model and another from an energy balance model, to partition annual ET into green (rainfall-based) and blue (surface water/groundwater) sources. Time series maps of green water ET (GWET) and blue water ET (BWET) are produced for the conterminous United States (CONUS) over 2001–2015. Our results indicate that average green and blue water for all land cover types in CONUS accounts for nearly 70% and 30% of the total ET, respectively. The ET in the eastern US arises mostly from GWET, and in the western US, it is mostly BWET. Analysis of the BWET in the 16 irrigated areas in CONUS revealed interesting results. While the magnitude of the BWET gradually showed a decline from west to east, the increase in coefficient of variation from west to east confirmed greater use of supplemental irrigation in the central and eastern US. We also established relationships between different hydro-climatology zones and their blue water requirements. This study provides insights on the relative contributions and the spatiotemporal dynamics of GWET and BWET, which could lead to improved water resources management. |
format |
article |
author |
Naga Manohar Velpuri Gabriel B. Senay |
author_facet |
Naga Manohar Velpuri Gabriel B. Senay |
author_sort |
Naga Manohar Velpuri |
title |
Partitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States |
title_short |
Partitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States |
title_full |
Partitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States |
title_fullStr |
Partitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States |
title_full_unstemmed |
Partitioning Evapotranspiration into Green and Blue Water Sources in the Conterminous United States |
title_sort |
partitioning evapotranspiration into green and blue water sources in the conterminous united states |
publisher |
Nature Portfolio |
publishDate |
2017 |
url |
https://doaj.org/article/be542b82ea7b483a9ae16f924094eb37 |
work_keys_str_mv |
AT nagamanoharvelpuri partitioningevapotranspirationintogreenandbluewatersourcesintheconterminousunitedstates AT gabrielbsenay partitioningevapotranspirationintogreenandbluewatersourcesintheconterminousunitedstates |
_version_ |
1718384867263119360 |