River Stories, Walking Across India – Part III

November 10, 2020November 10, 2020 SANDRPLeave a comment

Guest Blog by Siddharth Agarwal

In the years 2018 and 2019, I spent months walking East across India with Paul Salopek on the Out of Eden Walk (For details, see: https://www.nationalgeographic.org/projects/out-of-eden-walk/#section-0). His trail started in the Great Rift Valley of Ethiopia in East Africa, roughly following the path of the early human migration out of Africa and across the globe.

The India trail of the Out of Eden Walk started from the India-Pakistan border at Wagah, Punjab. It then moved East through the Indus Basin, followed by the basins of West flowing rivers like Luni, then a large chunk through the southern Gangetic plains in Central India before crossing over to the Brahmaputra basin close to Siliguri in West Bengal. The crossover to Myanmar happened at Moreh in Manipur, also incidentally very close to the basin boundary of Brahmaputra and Irrawady. He entered India in March 2018, and crossed over to Myanmar in July 2019.

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CWC - Central Water Commission

Overview of CWC’s Flood Forecasting Sites 2019: North East India

October 2, 2019November 2, 2019 SANDRPLeave a comment

Central Water Commission (CWC) monitors water level at several hundred sites in the country during monsoon every year. It publishes this information on its Flood Forecast (FF) website[I]. The website has three ways to get this information: Data Flow Map, List Based Exploration, and Hydrograph view. The Hydrograph view provides information for past 72 hours, supposed to be updated every hour. This is in addition to the list of current forecasts.

The CWC’s FF website had in 2018 monsoon, information about 226 Flood Forecast Sites in the country comprising of 166 Level Forecast Sites and 60 Inflow Forecast Sites. It also monitors 700 Flood sites, information made available through List Based Exploration and Hydrograph View. As reported below, the number of sites have gone up during 2019 monsoon, which is welcome. However, most of the new sites, along with some old ones do not have key information.

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Dams · Floods

Overview of CWC Flood Forecasting Sites 2018: East India

August 30, 2018September 26, 2019 SANDRPLeave a comment

Central Water Commission is the only agency doing flood forecasting in India. As per CWC’s Flood Forecasting website[I] the Data Flow Map has information about 226 Flood Forecast Sites in the country comprising of 166 Level Forecast Sites and 60 Inflow Forecast Sites. It also monitors 700 Flood sites, information made available through List Based Exploration and Hydrograph View, but no flood forecasting is done for these sites.

In order to better understand the CWC’s flood monitoring and forecasting work, in this article we have given an overview of CWC’s flood forecasting and monitoring sites in East India. It includes state wise list of CWC’s Level Forecast, Inflow Forecast and level monitoring sites in East India. Similar report has been published for North India[II] and North East India[III] and we hope to publish reports covering other regions of India too.

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Assam · brahmaputra · Dams · Floods · West Bengal

Brahmaputra basin faces unprecedented flood wave in Aug 2017

August 12, 2017 SANDRP5 Comments

In the morning of Aug 11, 2017, while checking my daily morning routine sites, I saw the sudden appearance of purple patch (signifying rainfall in access of 175 mm rainfall in previous 24 hours) on NASA daily rainfall accumulation map for Indian subcontinent.[i] The purpose patch covered parts of the West Bengal, North East Indian and Bangladesh. I was taken aback, but it was not very unusual to see in the peak of monsoon. So as we usually do, I took a screenshot and put up on SANDRP FB page with a warning that this could lead to floods. I did not realize that this was the beginning of an unprecedented wave of floods for these regions that may extend to Ganga basin as I write this. Such purple patches generally disappear in 24 hours, since the rains do not last to long. However, in the case of current phase, not only the purple patch has last now for 42 hours, it has extended to the west, all along India Nepal region along the southern boundary of Nepal. Continue reading “Brahmaputra basin faces unprecedented flood wave in Aug 2017” →