Dehua in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dehua plotted against Fujian and China. The SNDi of new construction in Dehua peaked in 1991-2005, compared to Fujian which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Dehua's incremental SNDi fell from 2.03 to 1.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dehua ranked 1st out of 75 cities in Fujian and 115th out of 1843 in China as of 2020.

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

• Calulo, Angola
• Gurupi, Brazil
• Umerkote, India
• Bebedouro, Brazil
• Bununu Dass, Nigeria
• Paracatu, Brazil

In new street additions, Dehua built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Calulo built increasingly disconnected streets over time and Bebedouro fluctuated in its street-construction patterns. Looking at the full network, Calulo and Bebedouro both became progressively more disconnected, while Dehua grew more disconnected from 1975 through 1991-2005, then improved. Dehua and Calulo have been growing further apart in their street-network character since 1975.