Trade off relationships: incorporating ecosystem spatial scale and timing issues into the decision making process

Lindsay Catherine Beevers, Amaury Tilmant, Elenestina Mwelwa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In large hydropower-dominated river basins, reservoirs are mainly operated so as to maximize revenues fromenergy generation regardless of the consequences of reduced flow fluctuation on downstream ecosystems. Revenuefrom hydropower plants is essential to a country’s economy; however the impact on ecosystems downstream canbe large-scale. The timing of flow releases does not mimic natural systems, which has impacts over differenttemporal and physio-spatial scales to the ecosystem. To inform decision making often hydro-economic modelingis used and it is essential that the response of the system is understood and incorporated adequately into assessmentdesign, to allow for trade-offs to be identified. This requires issues of timing and spatial scale to be understoodand incorporated over different planning horizons. Nesting these issues of scale into decisions is complex; wheredecisions are made on timescales from hours to months and spatially within a basin depending on the operation ofthe system. Up-scaling the most critical interactions between flow, form and ecosystem into the decision makingprocess, for different time horizons or planning scales, is essential. A proposed framework is illustrated with theZambezi basin.
Original languageEnglish
Title of host publicationGeophysical Research Abstracts
Subtitle of host publicationEGU General Assembly 2010
PublisherCopernicus Publications
Publication statusPublished - 2010
Event7th European Geosciences Union General Assembly 2010 - Vienna, Austria
Duration: 2 May 20107 May 2010

Publication series

NameGeophysical Research Abstracts
PublisherCopernicus Publications
Volume12
ISSN (Electronic)1607-7962

Conference

Conference7th European Geosciences Union General Assembly 2010
CountryAustria
CityVienna
Period2/05/107/05/10

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  • Cite this

    Beevers, L. C., Tilmant, A., & Mwelwa, E. (2010). Trade off relationships: incorporating ecosystem spatial scale and timing issues into the decision making process. In Geophysical Research Abstracts: EGU General Assembly 2010 (Geophysical Research Abstracts; Vol. 12). Copernicus Publications. http://meetingorganizer.copernicus.org/EGU2010/EGU2010-11576-1.pdf