A database about river bioengineering techniques: building online map and first analyses
| Autor: | Jaymond, Delphine, Guilloteau, Camille, Bray, Frédéric, Breton, Vincent, De Danieli, Sébastien, Torre, A., Evette, André |
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| Přispěvatelé: | Laboratoire des EcoSystèmes et des Sociétés en Montagne (UR LESSEM), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Didier, Marie |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | 5th international conference on Soil, Bio-and Eco-Engineering 5th international conference on Soil, Bio-and Eco-Engineering, Jun 2021, Bern, Switzerland |
| Popis: | International audience; Streambanks form edges between aquatic and terrestrial habitats. Natural riparian habitats are known for their great biodiversity, which is extremely high compared to their relative area. However, human constructions are often built close to the water. Streambank protection structures with bioengineering techniques can be a compromise both for protecting human issues and preserving riparian biodiversity. precisely which technique can be used in which conditions and this lack of knowledge and experience feedback is one of the main obstacles to bioengineering techniques development. To address this issue, we built the BDGeniVeg database and explored the link between bank-foot technique and river characteristics. BDGeniVeg is a database describing riverbank structures with bioengineering techniques in France. The inventory of structures has been based on bibliography and field work. Information is gathered in six groups: the structure itself (e.g. location, streambank features), the stream (section in front of the bioengineering structure), the soil bioengineering techniques, the origin of the data (institute, project), the plant species and field trip information (current condition of the techniques). A first analysis of the database assessed the influence of some hydromorphological variables on the choice of the different bank-foot techniques and if riprap is restricted to the harsher conditions. The variables considered here were the stream width, slope and the structure location in the meander. Our sub-sample represented 309 structures in France. The sub-sample included structures with data available for all the studied variables. We studied 5 techniques: fascine, wattle fence, comb, cribwall and riprap. We showed that riprap was used in harsher conditions (steeper, wider stream) than the others techniques. Cribwalls were used on steeper streams in contrast to combs. A part of this database is available online (https://genibiodiv.irstea.fr/en/database-of-french-constructions/). It allows river managers to know the bank protections that already exist in their neighbourhood. For research, it would allow scientists to improve their knowledge through a large set of data including temporal evolution and mechanical resistance of bioengineering techniques. |
| Databáze: | OpenAIRE |
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