Economy IMD develops technology to assess rise of water level in rivers, reservoirs by rain Updated : November 23, 2018 10:46 PM IST The technology called the 'Impact Based Forecasting Approach' which shows "pre-event scenario" can help authorities in taking real-time decisions, he said. The heavy downpour that ravaged Kerala for a fortnight ending August 21 caused death of around 500 people and economic damages worth over Rs 40,000 crore. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.