Potentialité des données satellitaires Sentinel-2 pour la cartographie de l’impact des feux de végétation en Afrique tropicale : application au Togo

Konko, Yawo; Afelu, Bareremna; Kokou, Kouami

doi:10.19182/bft2021.347.a36349

Cited by 3 publications

(2 citation statements)

References 41 publications

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“…The results of spatial data processing only become truly reliable after validation carried out in the field (or with reference data) and when they are accompanied by relevant statistics and indicators of the quality of the results [31]. Within the framework of this study, 530 and 482 points were retained for the ground checks respectively for the data of 2019 and 1976.…”

Section: Methods Of Results Validationmentioning

confidence: 99%

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Monitoring of Residual Forest Ecosystems Dynamics in the Mono Biosphere Reserve (Southeast Togo)

Akpamou¹,

Konko²,

Kokou³

2021

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The forest ecosystems of the Lacs 2 commune (South-East, Togo) are undergoing severe degradation, which has not yet been documented. This study is carried out in order to assess and quantify the spatio-temporal dynamics of residual forests and to identify the determinants of deforestation in South East Togo. The methodological approach is based on the use of historical aerial photographs from 1976 and drone images from 2019 in addition to field investigations. Several spatial structure indices were also calculated in order to quantify the fragmentation of classes and of the forest landscape. The results show that the forest landscape is changing. The classes of forests, plantations and palm groves show an annual rate of decline of 7.5%, 0.8% and 9.4% respectively while the classes of savannahs, agglomerations, surface water and swamps increased by 16.4%, 0.4%, 0.7% and 0.1%. The results also reveal a high fragmentation within the forest, plantation, surface water and swamp class and moderate fragmentation for the savannah and palm trees classes. At the landscape level, the savannah class is dominant by more than 70%, thus making the landscape little diversified from an ecological point of view. The main driver of deforestation in the study area remains shifting slash-and-burn agriculture. It is accentuated by the establishment of perennial oil palm crops, which has influenced the annual deforestation rate by 0.72%.

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Section: Methods Of Results Validationmentioning

confidence: 99%

“…F-Score accuracy (FSA) is the summary indicator of user precision and producer accuracy to assess the performance of the processing method [31]. It is given by the geometric mean of the producer accuracy and the user accuracy (Equation ( 12)).…”

Section: U Correctmentioning

confidence: 99%

Monitoring of Residual Forest Ecosystems Dynamics in the Mono Biosphere Reserve (Southeast Togo)

Akpamou¹,

Konko²,

Kokou³

2021

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Climate change and coastal erosion hotspots in West Africa: The case of Togo

Konko,

Umaru,

Nimon

et al. 2024

Regional Studies in Marine Science

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Impact of Human Activities on Woody Vegetation in Gallery Forests in the Mandara Mountains (Far North, Cameroon)

Fanday,

Tchobsala

2024

The Scientific World Journal

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This study was conducted in the Mandara Mountains in Cameroon and aimed to assess the effects of human activities on woody vegetation in gallery forests, based on floristic inventories and observations made by the government. Firstly, the inventories were carried out in 150 plots of 1000 m2 each, installed on the banks of watercourses following the band of plant formations. In each plot, woody species were counted and those showing at least one sign of degradation were noted. Secondly, the survey was conducted in 18 administrative structures made up of delegations (MINFOF, MINADER, MINEPDED, and MINEPIA) and town halls. One hundred woody species, grouped into 63 genera and 30 families, have been inventoried, in which 45 species showed at least one sign of damage caused by human being. The species most affected are Anogeissus leiocarpus (67 stems), Azadirachta indica (46 stems), Diospyros mespiliformis (43 stems), Acacia albida (42 stems), Andira inermis (30 stems), Acacia sieberiana (23 stems), Khaya senegalensis (19 stems), Ficus sycomorus (13 stems), and Acacia polyacantha (10 stems). The most recurrent activity in the gallery forests is pruning (212 stems), followed by cutting (93 stumps), then picking (71 individuals). However, there are fewer debarked trees (11) and trees with fire trail (6). According to the responses provided, logging (77.78%), agriculture (72.22%), population growth (44.44%), grazing (33.33%), and bush fires (33.33%) are the main causes of the degradation of plant formations in the Mandara Mountains. These main factors could have a negative impact on biodiversity if appropriate integrated management measures are not taken. To maintain these vital ecosystems, an integrated management plan must be put in place, limiting human activities to a minimum.

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Potentialité des données satellitaires Sentinel-2 pour la cartographie de l’impact des feux de végétation en Afrique tropicale : application au Togo

Cited by 3 publications

References 41 publications

Monitoring of Residual Forest Ecosystems Dynamics in the Mono Biosphere Reserve (Southeast Togo)

Monitoring of Residual Forest Ecosystems Dynamics in the Mono Biosphere Reserve (Southeast Togo)

Climate change and coastal erosion hotspots in West Africa: The case of Togo

Impact of Human Activities on Woody Vegetation in Gallery Forests in the Mandara Mountains (Far North, Cameroon)

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