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Open AccessArticle

Locating Spatial Opportunities for Nature-Based Solutions: A River Landscape Application

1
Institute of Environmental Planning, Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany
2
Department of Geography, Humboldt University of Berlin, Rudower Chausee 16, 10099 Berlin, Germany
3
Department of Computational Landscape Ecology, Helmholtz Centre for Environmental Research—UFZ, Permoser Str. 15, 04318 Leipzig, Germany
*
Author to whom correspondence should be addressed.
Water 2018, 10(12), 1869; https://doi.org/10.3390/w10121869
Received: 30 August 2018 / Revised: 23 November 2018 / Accepted: 7 December 2018 / Published: 17 December 2018
(This article belongs to the Section Water Quality and Ecosystems)
Compared to technical infrastructure, nature-based solutions (NBS) strive to work with nature and to move beyond business-as-usual practices. Despite decades of research from various academia fields and a commencing mainstreaming of the term, a lack of cohesiveness and pertinent methods regarding the subject matter hinders further implementation. Using a functional landscape approach, this paper aims to identify the spatial extent of existing and potential NBS locations and applies it across a case study in Germany. Inspired by hydrological models, which work with delineated hydrological response units, this research instead defines hydromorphological landscape units (HLU) based on biophysical spatial criteria to identify the potential areas that could function as NBS. This approach was tested for floodplain-based NBS. The identified HLU were then compared with historical floodplain and land-use data to differentiate between active or potential NBS. The spatial delineation identified 3.6 million hectares of already active floodplains areas, for which we recommend continued or modified protection measures, and 0.4 million ha where the hydromorphological conditions are apt to support floodplains, yet are cut-off from the flooding regime and require rehabilitation measures. The identification of NBS through explicitly defined HLU serves as a spatial approach to support NBS implementation. Taken together, our research can provide an essential contribution to systemize the emerging scholarship on NBS in river landscapes and to help in selecting and planning appropriate NBS in practice. View Full-Text
Keywords: river restoration; nature-based solutions; spatial analysis; floodplains river restoration; nature-based solutions; spatial analysis; floodplains
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Guerrero, P.; Haase, D.; Albert, C. Locating Spatial Opportunities for Nature-Based Solutions: A River Landscape Application. Water 2018, 10, 1869.

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