Floods

Rivers That Reached New Highest Flood Level during Monsoon 2020

Flooding in Madhya Pradesh, late August 2020. Photo: MP Govt., flood list.

In 2020, south west monsoon season when rainfall was 8.74% above normal, rivers reached new Highest Flood Levels (HFLs) at least at 37 locations across the country, as per information available to SANDRP. Maximum 13 such instances come from Central and East India, each. Five instances happened in South India, three in North India and two in North East India. This article provides wise details and hydrographs of all these sites.

SANDRP has been tracking the Highest Flood Level (HFL) breach incidents during monsoon season. The analysis of such HFL breaches in 2018 and 2019 are available on our website. In 2018 we had listed 25 such instances though SW Monsoon rainfall was 9.4% below normal. In 2019 we listed 37 such instances when the SW Monsoon rainfall was 10% above normal.

Continue reading “Rivers That Reached New Highest Flood Level during Monsoon 2020”
Bihar · Floods

Making sense of 2020 Gandak floods

While Bihar is again facing one of the worse floods this monsoon, one basin in Bihar that has possibly faced the maximum floods is Gandak, as a number of reports[i] have described. The floods in Gandak basin were pretty serious, as embankments along Gandak breached at multiple locations, first on western side (Gopalganj district) starting on July 23-24 night and then on Eastern side (Purbi Champaran district).  The flood lead to breaking of three year old HFL (Highest Flood Level) record at Dumariaghat, 19 year old HFL record at Lalganj and most shockingly, 34 year old HFL record at Rewaghat. Continue reading “Making sense of 2020 Gandak floods”

CWC - Central Water Commission · Floods

CWC flood forecasting: Inadequate, non transparent, inconsistent

As over 4 million people in the flood prone areas of North East go through second wave of floods and Ganga basin enters the long flood season, nation’s focus should be on one particular agency, Central Water Commission which is not only the only flood forecasting agency, but is also answerable in multiple other ways for the recurring flood disaster. But the flood forecasting of CWC[i] is grossly inadequate, inconsistent and non transparent.

To illustrate, let us look at the available information about CWC’s flood forecasting and compare it with happened in 2019 flood season. Out of 29 sites[ii] (7 level monitoring sites and 22 Lavel forecasting sites) where rivers crossed the previous Highest Flood Level as per CWC’s own hydrographs of last year, CWC has not updated HFL for at least 8 sites so far this year. In case Salavad in Jhalawar district in Rajasthan, on Kali Sindh river, in stead of updating the new HFL, CWC suddenly discovered this year that that the site had higher HFL achieved 35 years ago in 1985, though till last year, it listed 1996 HFL! Continue reading “CWC flood forecasting: Inadequate, non transparent, inconsistent”

CWC - Central Water Commission

2019 All India summary of CWC flood forecasting sites

This article provides and overview of flood forecasting work of Central Water Commission (CWC) in 2019 after looking closely at each site details for the five regions of India: North East[i], East[ii], North[iii], West[iv] and South[v] India.

The table below provides an overview of number of Level Forecasting, Level Monitoring and Inflow forecasting sites as per CWC’s FF website during 2019 floods for all the states and regions of India.

Continue reading “2019 All India summary of CWC flood forecasting sites”

CWC - Central Water Commission

South India Overview of CWC Flood Forecasting Sites 2019

Flood Forecasting (FF) is one of the important activities of Central Water Commission (CWC), which is undergoing expansion and improvement, but there is still a huge scope for improvement. 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 South India, the last region to be covered for 2019 flood season. It includes state wise list of CWC’s Level Forecast, Inflow Forecast and level monitoring sites in South Indian states of Andhra Pradesh, Telangana, Karnataka, Tamil Nadu, Puducherry (no FF sites) and Kerala. Similar report has been published for North India[i] and North East India[ii], East India[iii] and West India[iv].    Continue reading “South India Overview of CWC Flood Forecasting Sites 2019”

central water commission

East India: 2019 Overview of CWC Flood Forecasting Sites 

Central Water Commission (CWC) is the only agency doing flood forecasting in India. CWC’s Flood Forecasting (FF) is available on its website[I]. 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 soon. East India includes five states: Bihar, Jharkhand, Chhatisgarh, Odisha and W Bengal.

Continue reading “East India: 2019 Overview of CWC Flood Forecasting Sites “

Dam floods

Aug 2019 Krishna Basin floods in Karnataka & the Role of Dams

Belagavi district (earlier known as Belgaum) in Northern Karnataka is the worst affected among the Krishna Basin Flood affected districts in August 2019. As the state Chief Minister and Union Home Minister visit the area to take stock of the situation, it would help to understand the reasons for these unprecedented floods. Continue reading “Aug 2019 Krishna Basin floods in Karnataka & the Role of Dams”

Dam Induced Flood Disaster · Kerala

Role of dams in Kerala’s 2018 floods

ABSTRACT: Many independent observers have argued that dams have played a role in increasing the proportions of Kerala flood disaster during July-Aug 2018. This article shows that Kerala dams violated many basic norms and if operated prudently, could have helped. It shows how post dam floods are different than pre dam floods. It lists the steps that would help in future disasters involving dams. The lessons are useful for all large dams of India.

In theory, every dam can help moderate floods in the downstream areas, as long as and as much as the dam has space to store water. In fact, every action that helps to store, hold, recharge (to groundwater aquifer), delay flow of rainwater from the catchment to the river would help moderate flow and hence flood in the river. Our catchments are fast losing that capacity, with continued destruction of natural forests, wetlands, local water bodies and also soil’s capacity to hold water. Continue reading “Role of dams in Kerala’s 2018 floods”

Dams · Floods

Overview of CWC Flood Monitoring Sites 2018: INDIA

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, SANDRP has published report of CWC’s Level Forecast, Inflow Forecast and level monitoring sites in 5 zones of North India[ii], North East India[iii], East India[iv], South India[v] and West India[vi].  Through this report, we have presented all the data at one place with links to separate zone wise reports with detailed description.

Continue reading “Overview of CWC Flood Monitoring Sites 2018: INDIA”

Dams · Floods

Overview of CWC Flood Forecasting Sites 2018: WEST INDIA

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 other sites, information is 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 West India. It includes state wise list of CWC’s Level Forecasting, Inflow Forecasting and level monitoring sites in 5 States in West India. Similar report has been published for North India[ii] and North East India[iii] and East India[iv] and South India[v]. This is the last part in the series.  Continue reading “Overview of CWC Flood Forecasting Sites 2018: WEST INDIA”