Scaling relations reveal global and regional differences in morphometry of reservoirs and natural lakes

Water bodies provide essential ecosystem services linked to morphometric features that might differ between natural lakes and reservoirs. We use the HydroLAKES global dataset to quantitatively compare large (area > 1 km2) reservoirs and natural lakes in terms of scaling exponents between morphome...

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Bibliographic Details
Published in:The Science of the total environment 2022-05, Vol.822, p.153510-153510, Article 153510
Main Authors: Sjöberg, Ylva, Dessirier, Benoît, Ghajarnia, Navid, Jaramillo, Fernando, Jarsjö, Jerker, Panahi, Davood Moshir, Xu, Diandian, Zou, Liangchao, Manzoni, Stefano
Format: Article
Language:English
Subjects:
data collection
Ecosystem
Ecosystem services
ecosystems
environment
Lake morphometry
Lake shape
Lakes
land cover
landscapes
morphometry
Reservoirs
Scaling relations
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Summary:Water bodies provide essential ecosystem services linked to morphometric features that might differ between natural lakes and reservoirs. We use the HydroLAKES global dataset to quantitatively compare large (area > 1 km2) reservoirs and natural lakes in terms of scaling exponents between morphometric measures (volume, area, shore length). These exponents are further compared to those expected from geometrical assumptions and constraints. Lakes cover a larger range of volumes for the same range of surface areas than reservoirs, and have a larger volume-area scaling exponent. The volume-area scaling exponent for reservoirs (but not natural lakes) and the area-shore length exponent for all water bodies follow the predictions for self-affine surfaces. Land cover and terrain influence the scaling relations more for lakes than for reservoirs. These morphometric differences may be used to model the impact of reservoirs and lakes on hydrological processes and associated ecosystem services at regional to global scales. [Display omitted] •Lake morphometrics can be summarized and compared using their scaling relations.•Global morphometric scaling exponents are analyzed for natural lakes and reservoirs.•Volume increases with area more rapidly for natural lakes than for reservoirs.•Land cover and terrain influence some scaling relations for lakes, but not reservoirs.•Results suggest that lakes and reservoirs cannot provide same ecosystem services.
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2022.153510