Sahel: region in Burkina Faso
What exactly constitutes the spatial extent of the city? For these aggregations, we used the Global Human Settlement Layer Urban Center Database (GHS-UCDB) to define the boundaries of the city. These cities -- or urban centers -- cover areas that are densely populated and built-up, and so may extend beyond the spatial borders of these cities that we may be familiar with. The GHS area is shaded in blue.
View Sahel, Burkina Faso on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Sahel as of 2014, the overall level of street-network sprawl is 2.28, which is in the 40th to 60th percentile of disconnectedness.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.1, 4.07, 2.21 and 1.75. Street construction in Sahel increased in disconnectivity initially but has since improved. The streets constructed in 1976-1990 were the most disconnected.
Quantity of street network construction: The street network in Sahel spans a total of 1280 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 1.75, which is relatively well-connected.
Effect on the aggregate network: New construction in each period adds to the total stock of streets, but does not change streets that have already been built. Therefore, it has a limited effect on the street network as a whole. The SNDis of the aggregate street network in the respective time periods are 1.1, 3.22, 2.8 and 2.28. The aggregate street network in Sahel increased in disconnectivity initially,but the trend has turned around after 1990.
The level of street-network sprawl in new development in Sahel peaked in 1976-1990. To get a sense of how street development has changed in Sahel, we can consider two of its most populous cities: Dori and Djibo. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Dori followed a zig-zag trend. The level of street-network sprawl in new development in Djibo followed a zig-zag trend.
How do development practices in Sahel fare in comparison to others in Burkina Faso? Most recently in 2001-2014, street construction in Sahel was the 7th-most disconnected out of the 13 regions in Burkina Faso. Its position in the ranks since 1975 has fallen; relative to other regions in Burkina Faso, street construction in Sahel has become more connected. Sahel ranked 4th in 1975, 1st in 1976-1990, 5th in 1991-2000 and 7th in 2001-2014.
As of 2014, the city with the most disconnected street network in Sahel is Dori with an SNDi of 0.29, which is very well-connected. Conversely, the most connected city is Djibo with an SNDi of 0.03, which is very well-connected. See trends for these cities: Djibo, Dori
The level of street-network sprawl in the aggregate network in Sahel peaked in 1976-1990. To get a sense of how the aggregate street network has changed in Sahel, we can consider two of its most populous cities: Dori and Djibo. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Dori followed a zig-zag trend. The level of street-network sprawl in the aggregate network in Djibo followed a zig-zag trend.
To date, Sahel is the 3rd-most disconnected out of the 13 regions in Burkina Faso. Its position in the ranks since 1975 has risen; relative to other regions in Burkina Faso, the street network in Sahel has become more disconnected. Sahel ranked 4th in 1975, 1st in 1976-1990, 2nd in 1991-2000 and 3rd in 2001-2014.