Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014

The study is an analysis of the land cover spatial dynamics of the wetlands (Niayes) of Dakar from 1942 to 2014 by the use of geomatic tools. We used the aerial photographs of the years 1942, 1966 and 1978 and the satellite images of the years 2003 and 2014 to establish land-cover maps. The results...

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Autores principales:	Diop Aimée, Hyacinthe Sambou, Cheikh Diop, Elysée Ntiranyibagira, Honoré Dacosta, Bienvenu Sambou
Formato:	article
Lenguaje:	FR
Publicado:	Éditions en environnement VertigO 2018
Materias:	wetlands “Niayes” cartography spatial dynamics land-cover geomatics Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/ebc300aacc374894b2eeed2448169496
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id	oai:doaj.org-article:ebc300aacc374894b2eeed2448169496
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spelling	oai:doaj.org-article:ebc300aacc374894b2eeed24481694962021-12-02T09:59:31ZDynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 20141492-844210.4000/vertigo.20120https://doaj.org/article/ebc300aacc374894b2eeed24481694962018-05-01T00:00:00Zhttp://journals.openedition.org/vertigo/20120https://doaj.org/toc/1492-8442The study is an analysis of the land cover spatial dynamics of the wetlands (Niayes) of Dakar from 1942 to 2014 by the use of geomatic tools. We used the aerial photographs of the years 1942, 1966 and 1978 and the satellite images of the years 2003 and 2014 to establish land-cover maps. The results of the analysis show that the big drought of the 1970s affected the hydrology of the Niayes and brought a decrease in the extent of the flood-prone areas. The surface of the latter varied from 35.84 % in 1942 to 5.44 % in 2003. From 2003, the increased urbanization of the area gradually reduced the area that used to be covered by the Niayes although flooded areas rose by 9.25% in 2014. At that time, the built-up area prevailed with 37.27% at the expense of bare areas, waters surfaces, and especially woodlands. The densification of the road network is the major driver of the fragmentation of the Niayes and the main entryway to their occupation.Diop AiméeHyacinthe SambouCheikh DiopElysée NtiranyibagiraHonoré DacostaBienvenu SambouÉditions en environnement VertigOarticlewetlands“Niayes”cartographyspatial dynamicsland-covergeomaticsEnvironmental sciencesGE1-350FRVertigO, Vol 18, Iss 1 (2018)
institution	DOAJ
collection	DOAJ
language	FR
topic	wetlands “Niayes” cartography spatial dynamics land-cover geomatics Environmental sciences GE1-350
spellingShingle	wetlands “Niayes” cartography spatial dynamics land-cover geomatics Environmental sciences GE1-350 Diop Aimée Hyacinthe Sambou Cheikh Diop Elysée Ntiranyibagira Honoré Dacosta Bienvenu Sambou Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014
description	The study is an analysis of the land cover spatial dynamics of the wetlands (Niayes) of Dakar from 1942 to 2014 by the use of geomatic tools. We used the aerial photographs of the years 1942, 1966 and 1978 and the satellite images of the years 2003 and 2014 to establish land-cover maps. The results of the analysis show that the big drought of the 1970s affected the hydrology of the Niayes and brought a decrease in the extent of the flood-prone areas. The surface of the latter varied from 35.84 % in 1942 to 5.44 % in 2003. From 2003, the increased urbanization of the area gradually reduced the area that used to be covered by the Niayes although flooded areas rose by 9.25% in 2014. At that time, the built-up area prevailed with 37.27% at the expense of bare areas, waters surfaces, and especially woodlands. The densification of the road network is the major driver of the fragmentation of the Niayes and the main entryway to their occupation.
format	article
author	Diop Aimée Hyacinthe Sambou Cheikh Diop Elysée Ntiranyibagira Honoré Dacosta Bienvenu Sambou
author_facet	Diop Aimée Hyacinthe Sambou Cheikh Diop Elysée Ntiranyibagira Honoré Dacosta Bienvenu Sambou
author_sort	Diop Aimée
title	Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014
title_short	Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014
title_full	Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014
title_fullStr	Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014
title_full_unstemmed	Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014
title_sort	dynamique d’occupation du sol des zones humides urbanisées de dakar (sénégal) de 1942 à 2014
publisher	Éditions en environnement VertigO
publishDate	2018
url	https://doaj.org/article/ebc300aacc374894b2eeed2448169496
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Dynamique d’occupation du sol des zones humides urbanisées de Dakar (Sénégal) de 1942 à 2014

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