Climate change and population growth have led to the increase and/or intensification of flooding becoming a major issue. The objective of this study is to visualize flooding risk of municipalities at the intersection ...Climate change and population growth have led to the increase and/or intensification of flooding becoming a major issue. The objective of this study is to visualize flooding risk of municipalities at the intersection of the coastal sedimentary zone and the crystalline surface. The methodology adopted is based on geomatic approach, which involves documentary research, processing and assisted classification using remote sensing images and multi-criteria analysis of the Geographic Information System (GIS). Flooding risk is very high at 8.85% in Djidja, Toffo, Zè and Bonou municipalities. In other municipalities such as Agbangnizoun, Abomey, Bohicon, Za-Kpota and Cove, it is high of 46.85%. To the Southeast of the study area, it is located on the eastern and western banks of Oueme Valley. The medium risk represents 26.35% and is located in the municipalities of Ouinhi and Adjohoun. The other municipalities have a low rate of 17.95%. Risk modeling has made it possible to access the various levels of rising water that can cause flooding. Land-use planning decisions can be influenced by the results of this study.展开更多
The city of Comè adjoins the commune of Grand-Popo and the Togolese Republic. The latter is experiencing urban sprawl and the disappearance of natural ecosystems without respecting Land Use Plans. This research w...The city of Comè adjoins the commune of Grand-Popo and the Togolese Republic. The latter is experiencing urban sprawl and the disappearance of natural ecosystems without respecting Land Use Plans. This research was initiated to analyze the dynamics observed in land use and foretell the city urban sprawl. The method used is based on both mapping and field surveys. Landsat TM 2005 and OLI TIRS 2023 images have been processed to produce environmental dynamics and sprawl in addition to geographical coordinates of infrastructure, subdivision data and populations from 1979 to 2023. The “Land Change Modeler” program used in ArcGIS was used to predict urban sprawl in 2041. Population perceptions were analyzed from surveys of 100 people. Excel 2010 was used to produce the graphs. The results showed that the city of Comè grew from 221.1 ha to 2500.1 ha between 2005 and 2023. This urban sprawl does not necessarily follow the urban planning and land use plans proposed in the Master plan for the development of the municipality (SDAC). Subdivision operations, land use, population, infrastructure and geographical location of the crossroads town have all contributed to this sprawl. By 2041, the city will have expanded to 5583.37 ha. Over time, if this accelerated and uncontrolled urbanization is ignored, the city will expand to the point where the commune, which used to produce maize, oil palm, fish and vegetable resources, will find itself unable to provide these resources for its people.展开更多
文摘Climate change and population growth have led to the increase and/or intensification of flooding becoming a major issue. The objective of this study is to visualize flooding risk of municipalities at the intersection of the coastal sedimentary zone and the crystalline surface. The methodology adopted is based on geomatic approach, which involves documentary research, processing and assisted classification using remote sensing images and multi-criteria analysis of the Geographic Information System (GIS). Flooding risk is very high at 8.85% in Djidja, Toffo, Zè and Bonou municipalities. In other municipalities such as Agbangnizoun, Abomey, Bohicon, Za-Kpota and Cove, it is high of 46.85%. To the Southeast of the study area, it is located on the eastern and western banks of Oueme Valley. The medium risk represents 26.35% and is located in the municipalities of Ouinhi and Adjohoun. The other municipalities have a low rate of 17.95%. Risk modeling has made it possible to access the various levels of rising water that can cause flooding. Land-use planning decisions can be influenced by the results of this study.
文摘The city of Comè adjoins the commune of Grand-Popo and the Togolese Republic. The latter is experiencing urban sprawl and the disappearance of natural ecosystems without respecting Land Use Plans. This research was initiated to analyze the dynamics observed in land use and foretell the city urban sprawl. The method used is based on both mapping and field surveys. Landsat TM 2005 and OLI TIRS 2023 images have been processed to produce environmental dynamics and sprawl in addition to geographical coordinates of infrastructure, subdivision data and populations from 1979 to 2023. The “Land Change Modeler” program used in ArcGIS was used to predict urban sprawl in 2041. Population perceptions were analyzed from surveys of 100 people. Excel 2010 was used to produce the graphs. The results showed that the city of Comè grew from 221.1 ha to 2500.1 ha between 2005 and 2023. This urban sprawl does not necessarily follow the urban planning and land use plans proposed in the Master plan for the development of the municipality (SDAC). Subdivision operations, land use, population, infrastructure and geographical location of the crossroads town have all contributed to this sprawl. By 2041, the city will have expanded to 5583.37 ha. Over time, if this accelerated and uncontrolled urbanization is ignored, the city will expand to the point where the commune, which used to produce maize, oil palm, fish and vegetable resources, will find itself unable to provide these resources for its people.
