气候变化领域集成服务门户(CCPortal): The water-energy-food-ecosystem nexus in the Danube River Basin: Exploring scenarios and implications of maize irrigation

CCPortal

DOI	10.1016/j.scitotenv.2023.169405
	The water-energy-food-ecosystem nexus in the Danube River Basin: Exploring scenarios and implications of maize irrigation
	Probst, Elisabeth; Fader, Marianela; Mauser, Wolfram
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	914
卷号	914
英文摘要	The Water -Energy -Food -Ecosystem (WEFE) nexus concept postulates that water, energy production, agriculture and ecosystems are closely interlinked. In transboundary river basins, different sectors and countries compete for shared water resources. In the Danube River Basin (DRB), possible expansion of agricultural irrigation is expected to intensify water competition in the WEFE nexus, however, trade-offs have not yet been quantified. Here, we quantified trade-offs between agriculture, hydropower and (aquatic) ecosystems in the DRB resulting from maize irrigation when irrigation water was withdrawn from rivers. Using the process -based hydro-agroecological model PROMET, we simulated three maize scenarios for the period 2011-2020: (i) rainfed; (ii) irrigated near rivers without considering environmental flow requirements (EFRs); (iii) irrigated near rivers with water abstractions complying with EFRs. Maize yield and water use efficiency (WUE) increased by 101-125 % and 29-34 % under irrigation compared to rainfed cultivation. Irrigation water withdrawals from rivers resulted in moderate to severe discharge reductions and, without consideration of EFRs, to substantial EFR infringements. Annual hydropower production decreased by 1.0-1.9 % due to discharge reductions. However, the financial turnover increase in agriculture (5.8-7.2 billion euro/a) was two orders of magnitude larger than the financial turnover decrease in hydropower (23.9-47.8 million euro/a), making water more profitable in agriculture. Irrigation WUE was highest for EFR-compliant irrigation, indicating that maintaining EFRs is economically beneficial and that improving WUE is key to attenuating nexus water competition. Current maize production could be met on the most productive 35-41 % of current maize cropland under irrigation, allowing 59-65 % to be returned to nature without loss of production. Maize priority areas were on fertile lowlands near major rivers, while biodiversity priority areas were on marginal cropland of highest biodiversity intactness. Our quantitative tradeoff analysis can help identifying science -based pathways for sustainable WEFE nexus management in the DRB, also in light of climate change.
英文关键词	Water competition; Agriculture; Water use efficiency; Hydropower; Biodiversity; PROMET
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001164302500001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290977
作者单位	University of Munich
推荐引用方式 GB/T 7714	Probst, Elisabeth,Fader, Marianela,Mauser, Wolfram. The water-energy-food-ecosystem nexus in the Danube River Basin: Exploring scenarios and implications of maize irrigation[J],2024,914.
APA	Probst, Elisabeth,Fader, Marianela,&Mauser, Wolfram.(2024).The water-energy-food-ecosystem nexus in the Danube River Basin: Exploring scenarios and implications of maize irrigation.SCIENCE OF THE TOTAL ENVIRONMENT,914.
MLA	Probst, Elisabeth,et al."The water-energy-food-ecosystem nexus in the Danube River Basin: Exploring scenarios and implications of maize irrigation".SCIENCE OF THE TOTAL ENVIRONMENT 914(2024).