Partitioning blue and green water sources of evapotranspiration using the water evaluation and planning (WEAP) model

IF 1.6 Q3 WATER RESOURCES Water Practice and Technology Pub Date : 2023-11-09 DOI:10.2166/wpt.2023.191
Belete Berhanu Kidanewold, Ethiopia Bisrat Zeleke, Claire Michailovsky, Solomon Seyoum
{"title":"Partitioning blue and green water sources of evapotranspiration using the water evaluation and planning (WEAP) model","authors":"Belete Berhanu Kidanewold, Ethiopia Bisrat Zeleke, Claire Michailovsky, Solomon Seyoum","doi":"10.2166/wpt.2023.191","DOIUrl":null,"url":null,"abstract":"Abstract Understanding agricultural water use by sources such as rainwater (green water) or irrigation water (blue water) is vital to manage scarce freshwater resources. Tracing sources of evapotranspiration increases water management efficiency. This study proposes a two-bucket soil moisture water balance approach to trace sources of evapotranspiration over irrigated landscapes in the Awash Basin, Ethiopia, which is modeled in the water evaluation and planning model. Algorithms are devised to separate actual evapotranspiration into blue and green sources. The results showed annual basin renewable water of 15.78 BCM in the form of streamflow (4.65 BCM), stored water (3.54 BCM), and groundwater percolation (7.59 BCM). Annual actual evapotranspiration over irrigated landscapes was 805 MCM, which was separated as blue evapotranspiration (88.4%) and green evapotranspiration (11.6%). The findings also demonstrate that blue evapotranspiration predominantly occurs during dry months, indicating heavy reliance on stored water for irrigated landscapes. Subbasin-level analyses showed varying blue/green evapotranspiration patterns based on precipitation and irrigated agriculture. Irrigation accounted for less than 3% of the streamflow in upstream basins, while midstream and downstream basins utilized up to 30 and 70%, respectively. The complementary use of rainfall and irrigation in most parts of the basin is considered to be of interest to water managers.","PeriodicalId":23794,"journal":{"name":"Water Practice and Technology","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Practice and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2166/wpt.2023.191","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"WATER RESOURCES","Score":null,"Total":0}
引用次数: 0

Abstract

Abstract Understanding agricultural water use by sources such as rainwater (green water) or irrigation water (blue water) is vital to manage scarce freshwater resources. Tracing sources of evapotranspiration increases water management efficiency. This study proposes a two-bucket soil moisture water balance approach to trace sources of evapotranspiration over irrigated landscapes in the Awash Basin, Ethiopia, which is modeled in the water evaluation and planning model. Algorithms are devised to separate actual evapotranspiration into blue and green sources. The results showed annual basin renewable water of 15.78 BCM in the form of streamflow (4.65 BCM), stored water (3.54 BCM), and groundwater percolation (7.59 BCM). Annual actual evapotranspiration over irrigated landscapes was 805 MCM, which was separated as blue evapotranspiration (88.4%) and green evapotranspiration (11.6%). The findings also demonstrate that blue evapotranspiration predominantly occurs during dry months, indicating heavy reliance on stored water for irrigated landscapes. Subbasin-level analyses showed varying blue/green evapotranspiration patterns based on precipitation and irrigated agriculture. Irrigation accounted for less than 3% of the streamflow in upstream basins, while midstream and downstream basins utilized up to 30 and 70%, respectively. The complementary use of rainfall and irrigation in most parts of the basin is considered to be of interest to water managers.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
利用水资源评价与规划(WEAP)模型划分蒸散蓝绿水源
了解雨水(绿水)或灌溉用水(蓝水)等农业用水来源对于管理稀缺的淡水资源至关重要。追踪蒸散的来源可提高水管理效率。本研究提出了一种双桶土壤水分平衡方法来追踪埃塞俄比亚阿瓦什盆地灌溉景观的蒸散发来源,并在水资源评价和规划模型中对其进行了建模。设计算法将实际蒸散发分为蓝色和绿色来源。结果表明:流域年可再生水量为15.78 BCM,分别为河流流量(4.65 BCM)、储水(3.54 BCM)和地下水渗流(7.59 BCM)。灌溉景观年实际蒸散量为805 MCM,分别为蓝色蒸散(88.4%)和绿色蒸散(11.6%)。研究结果还表明,蓝色蒸散主要发生在干旱月份,表明灌溉景观严重依赖储存的水。亚流域水平分析显示,基于降水和灌溉农业的蓝/绿蒸散模式存在差异。上游流域灌溉占流量的比例不到3%,而中游和下游流域分别高达30%和70%。流域大部分地区降雨和灌溉的互补利用被认为是水资源管理人员感兴趣的问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
期刊最新文献
Hydro-geochemical characterisation and modelling of groundwater in Chikun Local Government Area of Kaduna state, Nigeria A methodology for temporal disaggregation of daily rain gauge data using satellite precipitation product for improved accuracy in hydrologic simulation ACWA: an AI-driven cyber-physical testbed for intelligent water systems Phosphorus removal from ore waste in aqueous solution with different mass of ore waste adsorbent from the Johor mine site Assessment of risks to the quality of water supplied in Bushenyi-Uganda using the water safety plan approach
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1