Delta Cities in developing countries face problems of water risks while also dealing with enormous population growth. Recent urbanisation is increasingly taking place in high risk areas.

When looking into these recent urbanisation processes, we can discern two different dynamics, formal and informal ones. They relate in different ways to green, grey and blue infrastructures, and have their own formal and informal institutional drivers.

Modern technocratic planning methods do not positively interfere with informal city growth. On the contrary, often water problems are shifted to the lower and informal parts of the city. Inclusive green planning should take into account local urbanisation practice.