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Effectiveness of measures aiming to stabilize urban gullies in tropical cities:Results from field surveys across ***

International Soil and Water Conservation Research 2023年第1期11卷 14-29页

作者： Eric Lutete Landu Guy Ilombe Mawe Fils Makanzu Imwangana Charles Bielders Olivier Dewitte Jean Poesen Aurélia Hubert Matthias Vanmaercke Department of Geography(U.R.SPHERES) University of LiegeClos Mercator 34000LiègeBelgium Department of Geoscience University of KinshasaKinshasa Mont-AmbaCongo Department of Natural resources management University of KinshasaKinshasa Mont-AmbaD.R Congo Department of Geology Oficial University of de BukavuCongo Geomorphology and Remote Sensing Laboratory Center for Geological and Mining ResearchCongo Earth and Life Institute-Environmental Sciences Universite catholique de LouvainCroix du sud 2L7.05.021348Louvain-la-NeuveBelgium Royal Museum for Central Africa Leuvensesteenweg 13B-3080TervurenBelgium Department of Earth and Environmental Sciences KU LeuvenCelestijnenlan 200E3001HeverleeBelgium Institute of Earth and Environmental Sciences Maria-Curie Sklodowska University(UMCS)Krasnicka 2D20-718LublinPoland

urban gullies are a rapidly growing concern in many tropical cities of the Global *** measures are already implemented for their ***,an overview of these measures and their overall effectivenesss is currently *** aim at addressing this gap by documenting existing ini-tiatives to stabilize urban gullies in *** and assessing their overall *** this end we conducted extensive field campaigns in Kinshasa,Kikwit and Bukavu and combined our terrain obser-vations with data on gully expansion rates(derived from series of satellite imagery).In total,we char-acterized present and past stabilization initiatives for 398 urban *** 69 of these gullies,the effect of a specific measure on gully expansion rates could be *** show that for the large ma-jority of gullies,various measures have been ***,these are mainly ad-hoc measures installed by the affected *** structural measures based on larger engineering works were observed for only 20-30%of *** huge efforts invested in the installation of measures strongly contrast with their overall low impact Among all strategies,only the deviation of runoff resulted in significantly lower expansion rates after *** numerous initiatives that rely on the sparse means available seem to have limited *** does not imply,however,that they are completely ineffective and should be *** on our findings,we formulate recommendations for further research on how to effectively prevent and stabilize urban gullies,taking into account the difficult environmental and socio-economic context.

关键词： Gully expansion rate Head and channel measures Catchment measures Global South urban hazard

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