Chennai Corporation improves its rain forecasting system with TNSDMA software

The civic body has stepped up efforts to mitigate flooding following IMD’s forecast of rain for three days from November 9

The civic body has stepped up efforts to mitigate flooding following IMD’s forecast of rain for three days from November 9

This northeast monsoon, the Greater Chennai Corporation has upgraded the real-time forecasting system for each of the 200 wards in the city’s 426 sq km.

The company’s commissioner, Gagandeep Singh Bedi, has asked teams of officials to use appropriate technology to improve flood preparedness. “We integrated the disaster management application ICCC (Integrated Command and Control System) with the real-time flood forecasting software of the State of Tamil Nadu Disaster Management Authority. The software was developed with TNUIFSL. In this, we can see the rain forecast in each of the 200 districts of Chennai. In our ICCC dashboard, we can see the rain forecast for a neighborhood for three days,” Deputy Commissioner (Revenue and Finance) Vishu Mahajan said.

There are several aspects that will be raised for the improvement of real-time forecasts. “So far, the main things that have been implemented and live are the rainfall forecasts for every ward in Chennai,” the official said.

City officials will be able to see what is going to happen in each of the 200 neighborhoods, thanks to two main weather models, one called the GFS (Global Forecast System) model and the other called the ECMWF (European Center for Medium-Range Forecasts) weather model. weather report). “These two global models that we used. We can see both predictions in the neighborhood dashboard,” Mahajan said.

With existing technology, officials will know what time of day the highest amount of rain will be received in a neighborhood so they can plan accordingly.

“Other predictors offered are the inflow into the main channels and the forecast outflow and discharge from the main reservoirs and lakes. It’s not fully live yet. The other two things that are coming soon and will be incorporated into the ICCC are flood forecasting which will give the exact locations that will be flooded and how much they will be flooded,” an official said.

“For this, the system will use all the data on the stormwater drainage network, what is the capacity of these, the terrain, the geography, the amount of precipitation, etc. Apart from that, another thing that will be integrated is live data of major reservoir releases and channel entries and real-time alerts,” the official said.

There are around 41 locations spanning major canals, subways and bridges, where there is something called the Flood Sensor which uses sonar to calculate water levels at these locations. There are thresholds in the ICCC software and only when those levels are exceeded are alerts sent to the area officer and regional deputy commissioner to take action, said the responsibles.

Illegal dumping

In the meantime, the Company has taken measures to prevent flooding in residential areas.

Municipal administration and water supply secretary Shiv Das Meena and company commissioner Gagandeep Singh Bedi ordered officers to identify places where illegal dumping had taken place in the canals.

“We have identified 40 places where residents dump municipal solid waste into canals. These channels are clogged, which increases the risk of flooding in these areas. We will install cameras to monitor the areas in real time. The work will be completed shortly,” an official said.