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| Titel |
Towards ecosystem accounting: a comprehensive approach to modelling multiple hydrological ecosystem services |
| VerfasserIn |
C. Duku, H. Rathjens, S. J. Zwart, L. Hein |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 10 ; Nr. 19, no. 10 (2015-10-30), S.4377-4396 |
| Datensatznummer |
250120839
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| Publikation (Nr.) |
 copernicus.org/hess-19-4377-2015.pdf |
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| Zusammenfassung |
| Ecosystem accounting is an emerging field that aims to provide a consistent
approach to analysing environment–economy interactions. One of the specific
features of ecosystem accounting is the distinction between the capacity and
the flow of ecosystem services. Ecohydrological modelling to support
ecosystem accounting requires considering among others physical and
mathematical representation of ecohydrological processes, spatial
heterogeneity of the ecosystem, temporal resolution, and required model
accuracy. This study examines how a spatially explicit ecohydrological model
can be used to analyse multiple hydrological ecosystem services in line with
the ecosystem accounting framework. We use the Upper Ouémé watershed
in Benin as a test case to demonstrate our approach. The Soil Water and
Assessment Tool (SWAT), which has been configured with a grid-based landscape
discretization and further enhanced to simulate water flow across the
discretized landscape units, is used to simulate the ecohydrology of the
Upper Ouémé watershed. Indicators consistent with the ecosystem
accounting framework are used to map and quantify the capacities and the
flows of multiple hydrological ecosystem services based on the model outputs.
Biophysical ecosystem accounts are subsequently set up based on the spatial
estimates of hydrological ecosystem services. In addition, we conduct trend
analysis statistical tests on biophysical ecosystem accounts to identify
trends in changes in the capacity of the watershed ecosystems to provide
service flows. We show that the integration of hydrological ecosystem
services into an ecosystem accounting framework provides relevant information
on ecosystems and hydrological ecosystem services at appropriate scales
suitable for decision-making. |
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