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For the first time, the Uttarakhand government, IIRS will study urban flooding in Dehradun


The Uttarakhand State Disaster Management Authority (USDMA), in collaboration with the Indian Institute of Remote Sensing (IIRS), plans to undertake the first study of its kind on urban flood patterns in the state capital.

Riddhim Aggarwal, additional executive director of the USDMA, said it is the first time such a study has been carried out in any city in Uttarakhand.

“Within the framework of this study, high-resolution maps of around 1 cm of flood-prone areas will be developed using high-tech drones. Based on these maps that also capture the ripples of the land in very high resolution, we will understand the drainage and corridors for rainwater and flood patterns around Rispana (a tributary of the Song River that drains central Dehradun) and Bindal (which also flows through Dehradun and is fed by various springs at the base of the Mussoorie ridge) rivers in Dehradun, ”he said.

Aggarwal said that the USDMA has been in negotiations with IIRS experts in this regard for quite some time.

“We held a meeting with the IIRS experts on Wednesday in which we discussed various technicalities and modalities for this survey,” he said.

The additional USDMA CEO said that they will soon sign a memorandum of understanding (MoU) with the IIRS in this regard.

“The high-resolution city maps will give us a clear idea of ​​the areas where severe flooding is possible due to heavy rains and blockages (in the form of encroachments and debris) in the drainage and nullahs. The high-resolution maps will also help us identify low-lying areas around rivers where flooding is possible, ”he said.

Aggarwal said they have a lot of data from existing rain gauges and gauges. “IIRS also has good data. But these data have never been integrated with regard to understanding the urban flood pattern. The integration of this data and the high resolution maps will help us save lives and property due to flooding and severe waterlogging in the urban landscape. After conducting this study in Dehradun, and based on the results, we have plans to conduct such studies in other cities in the state in the future, “he said.

Last year a PIL was filed in the Uttarakhand High Court alleging that a large number of trees had been cut down and encroachments had been made around the stormwater drains / nullahs in Dehradun that flow into the Rispana and Bindal rivers. The state government, through an affidavit from District Magistrate Dehradun, had informed the court that about 270 acres of land had been encroached on river beds, nullahs, and seasonal streams in the Doon Valley.

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