During ongoing North East monsoon season at least six rivers have breached highest flood levels (HFLs) at their respective flood monitoring sites in December 2023. All of these HFL breach incidents have taken place in two states of Andhra Pradesh (3) and Tamil Nadu (3). Interestingly, all of these rivers are part of East Flowing Rivers (EFR) between Pennar and Kanyakumari basin. The details of HFL breach sites and rivers are given in table below.
Continue reading “Rivers Crossing Highest Flood Levels in Dec 2023”Tag: Forecast
Oct 2023: CWC Flood Forecast FAILS during Teesta Glacial Floods
(Feature Image: NHPC’s Teesta VI hydro project at Sirwani, Sikkim affected by GLOF deluge on Oct. 04, 2023. Image Source: Weatherman Shubham.)
The Teesta River has witnessed unprecedented scale of floods following South Lohnak Glacial Lake Outburst Flood (GLOF) event in the intermittent night of October 03-04, 2023. The details and impact of the deluge can be seen here. The incident has once again underlined shortcomings in Central Water Commission’s (CWC) flood monitoring and forecasts work.
Continue reading “Oct 2023: CWC Flood Forecast FAILS during Teesta Glacial Floods”July-August 2023: Problems in CWC Flood Monitoring & Forecast
(Feature Image: CWC’s Delhi Railway Bridge forecast site showing abrupt changes in Yamuna water level during unusual flood spell in July 2023)
July and August are peak months of South West monsoon. There has already been flood related destruction in several states including Himachal Pradesh, Punjab, Haryana, Delhi and Uttarakhand so far. Amid these flood spells, SANDRP has observed many serious issues plaguing Central Water Commission’s (CWC) flood forecasting and monitoring work and some of these are described below.
Continue reading “July-August 2023: Problems in CWC Flood Monitoring & Forecast”2022: CWC Flood Monitoring Sites in North India
(Feature image: Bar Chart showing number of Level Forecast/Monitoring, Inflow Forecast sites in North Indian States & UTs)
Continuing analysis of Central Water Commission’s flood forecast website, SANDRP presents the details of flood monitoring sites in North Indian states comprising Union Territories of Jammu & Kashmir, Ladakh, Chandigarh, Delhi and states of Himachal Pradesh, Uttarakhand, Punjab, Haryana and Uttar Pradesh. Before this, we have prepared similar critical reports and highlighted problematic issues in flood monitoring sites in North India in 2018, 2019 and 2020.
Continue reading “2022: CWC Flood Monitoring Sites in North India“North India; CWC Flood Forecasting Sites 2020; New Website Old Problems
Flood forecasting is an important activity during monsoon, considering the huge and increasing flood prone area, flood frequency, intensity and flood damages. Accurate and timely flood forecasting can hugely help reduce the damages due to floods. Central Water Commission (CWC) is the only agency responsible for flood forecasting in India. To understand the CWC’s flood forecasting better, we have compiled the list of the various flood, inflow forecasting sites and flood monitoring sites in India.
In this compilation, we have given state wise list of CWC’s level forecasting, flood monitoring and inflow forecasting sites in North India, comprising of Union Territories Jammu & Kashmir, Ladakh, Chandigarh, Delhi and states of Himachal Pradesh, Uttarakhand, Punjab, Haryana and Uttar Pradesh. It includes available details like name of river, sub basin, Warning level (WL), Danger Level (DL), High Flood Level (HFL), Full Reservoir Level (FRL), Maximum Water Level (MWL), as applicable. As we see below, there are many gaps in this basic information for the sites that are part of CWC’s list. A similar zonewise overview of CWC’s sites was compiled in 2018 and 2019, which can be seen here: Overview of CWC Flood Forecasting Sites 2018: North India; Overview of CWC Flood Forecasting Sites 2019: North India. We have brought this updated compilation for 2020 as there are large number of changes.
Continue reading “North India; CWC Flood Forecasting Sites 2020; New Website Old Problems”Overview of CWC’s Flood Forecasting Sites 2019: North East India
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.
Continue reading “Overview of CWC’s Flood Forecasting Sites 2019: North East India”