Show simple item record

dc.contributor.author
Calamita, Elisa
dc.contributor.author
Vanzo, Davide
dc.contributor.author
Wehrli, Bernhard
dc.contributor.author
Schmid, Martin
dc.date.accessioned
2021-05-07T07:01:07Z
dc.date.available
2021-05-05T04:04:31Z
dc.date.available
2021-05-07T07:01:07Z
dc.date.issued
2021-04
dc.identifier.issn
0043-1397
dc.identifier.issn
1944-7973
dc.identifier.other
10.1029/2020WR027465
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/482475
dc.identifier.doi
10.3929/ethz-b-000482475
dc.description.abstract
Water quality in tropical rivers is changing rapidly. The ongoing boom of dam construction for hydropower is one of the drivers for this change. In particular, the stratification in tropical reservoirs induces oxygen deficits in their deep waters and warmer surface water temperatures, which often translate into altered thermal and oxygen regimes of downstream river systems, with cascading consequences for the entire aquatic ecosystem. Operation rules of reservoirs, involving water intakes at different levels, could mitigate the consequences for downstream water quality. However, optimized water management of deep reservoirs relies on predictive models for water quality, but such predictive capability is often lacking for tropical dams. Here we focus on the Zambezi River Basin (southern Africa) to address this gap. Using the one-dimensional General Lake Model, we reproduced the internal dynamics of the transboundary Lake Kariba, the world’s largest artificial lake by volume, created by damming the Zambezi River at the border between Zambia and Zimbabwe. Through this modeling approach, we assessed and quantified the thermal and oxygen alteration in the Zambezi River downstream of the reservoir. Results suggest that these alterations depend directly on Kariba’s stratification dynamics, its water level and the transboundary policies for water withdrawal from the reservoir. Scenario calculations indicate a large potential for mitigating downstream water quality alterations by implementing a hypothetical selective withdrawal technology. However, we show that a different and cooperative management of the existing infrastructure of Kariba Dam has the potential to mitigate most of the actual water quality alterations.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
dam management
en_US
dc.subject
General Lake Model
en_US
dc.subject
lake modeling
en_US
dc.subject
tropical dam
en_US
dc.subject
water quality alterations
en_US
dc.title
Lake Modeling Reveals Management Opportunities for Improving Water Quality Downstream of Transboundary Tropical Dams
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2021-03-28
ethz.journal.title
Water Resources Research
ethz.journal.volume
57
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
Water Resour. Res.
ethz.pages.start
e2020WR027465
en_US
ethz.size
20 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Use of a Decision-Analytic Framework to explore the water-energy-food NExus in complex and trans-boundary water resources systems of fast growing developing countries.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Hoboken, NJ
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03328 - Wehrli, Bernhard (emeritus) / Wehrli, Bernhard (emeritus)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03328 - Wehrli, Bernhard (emeritus) / Wehrli, Bernhard (emeritus)
ethz.grant.agreementno
690268
ethz.grant.fundername
SBFI
ethz.grant.funderDoi
10.13039/501100007352
ethz.grant.program
H2020
ethz.date.deposited
2021-05-05T04:04:48Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-05-07T07:01:19Z
ethz.rosetta.lastUpdated
2023-02-06T21:46:32Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Lake%20Modeling%20Reveals%20Management%20Opportunities%20for%20Improving%20Water%20Quality%20Downstream%20of%20Transboundary%20Tropical%20Dams&rft.jtitle=Water%20Resources%20Research&rft.date=2021-04&rft.volume=57&rft.issue=4&rft.spage=e2020WR027465&rft.issn=0043-1397&1944-7973&rft.au=Calamita,%20Elisa&Vanzo,%20Davide&Wehrli,%20Bernhard&Schmid,%20Martin&rft.genre=article&rft_id=info:doi/10.1029/2020WR027465&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record