Thread by @ReapBenefit

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Tune in to listen to @rajbhagatt to understand systemic and natural reasons why #Bengaluru floods, and what can be done about it.

Despite being 900m above the sea level, why does this water logging happen?

Topography of ancient #Bengaluru was apt for making bunds/tanks along the valley to support irrigation.

Now these tanks and bunds became interconnected network of lakes.

(1/n)

Developments (roads, elevations, buildings) started happening around these valleys and lakes.

This prevents percolation of water underground

So many of the heavily flooded areas fall in the valley region

Ex:
Rmz ecospace.
Manyata tech park
Kendriya Vihar

(2/n)

Protection of valley and solutions for addressing flooding issues is supposed to be addressed in Master Plan.
Some of the factors causing the problem
0. Lack of scientific assessment
1. Planning gaps
2. Construction practices
3. Lack of data in open source to assist in 0,1..

What might help towards solving this problem

1. Topographical data
2. Data on storm water drains
3. Data of local places getting water logged

Having this in #Open source. So that investigation can be case by case to arrive at #local solutions for each of the high risk areas.

And lastly to bring systemic change in the long run.

1. Stronger governance for locally democratic mechanisms to find solutions

2. Finance

@opencity_in @citizenmatters
@ReapBenefit
@WRIIndia @WRICitiesIndia