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”
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”
China not to alter course of rivers flowing into Nepal China has agreed not to deliberately change or cause to change the course of any trans-boundary rivers flowing into Nepal. This comes under an Agreement on the Boundary Management System reached with Nepal during the visit of Chinese President Xi Jinping to Kathmandu in October 2019. All the major rivers including the Karnali, Kali Gandaki, Budhi Gandaki, Trishuli, Sunkoshi, Bhotekoshi, Tamakoshi and Arun originate in the Tibet Autonomous Region (TAR) of China. Nepal as well as the northern part of India could be seriously affected if any dams or diversion projects are built in upper riparian Tibet. “Both sides shall, as far as possible, prevent the boundary rivers from changing their courses. Neither side shall deliberately change or cause to change the course of any boundary river,” states Article 7 (1) of the Agreement. Continue reading “NEPAL DRP Overview 2019”
Indian media never seems to report this, but IMD (India Meteorological Department) also provides river basin wise rainfall figures for South West Monsoon, also for other seasons. As in the previous years, here is an overview of the river basin wise rainfall during just concluded SW Monsoon 2019 (June-Sept 2019, though the monsoon started withdrawing only on Oct 9 and has not yet fully withdrawn from across India as I write this on Oct 15 2019), like the way we have been doing for the last three years[i]. Our earlier monsoon 2019 articles provided monsoon over view[ii], state wise rainfall figures[iii] and Marathwada specific situation[iv].
It’s not clear why Indian media does not report river basin wise rainfall figures, since that is arguably, the most appropriate way to look at the rainfall figures, since river basins are the hydrological units and the run off from the rainfall ends up in the rivers, and creates floods many times, as happened during 2019 monsoon. There could be issues of quality of the river basin wise rainfall figures, but that is true for all IMD’s rainfall figures at some level or other. Continue reading “River Wise Rainfall in Monsoon 2019”
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 “
A new surge in the developmental interventions in the rivers in India is seen with the implementation of National Inland Waterways Act, 2016. Under this Act, 138 stretches of the rivers, creeks, backwaters, estuaries, etc. in 24 states and 2 union territories will be developed as the ‘national inland waterways’ for the transportation of huge cargo and passenger vessels. Being declared as “national” means that the control and regulation of these waterways will be in the hands of the central government and not state governments. This project of Central Government is being pushed forward with the claims of inland water transport being cost-effect, environmental friendly and safe for the transportation of hazardous goods. However, these so called benefits are neither universal nor automatic as they will be dependent on certain conditions, and will accrue if and when those conditions are met. Development of these waterways will be controlled and regulated by Inland Waterways Authority of India (IWAI). Continue reading “National Inland Waterways in Bihar: Viable or desirable?”
Ganga Basin, particularly Bihar is facing unprecedented floods, starting on Aug 12, 2017. Water levels of Major tributaries of Ganga, including Kosi, Mahananda, Rapti, Ghagra, Bagmati, Gandak and Kamlabalan are close to or above the historically highest flood levels almost simultaneously. This has rarely happened in the past. The water level of Ghagra is close to HFL at Elgine Bridge in Barabanki district in Uttar Pradesh. Most other flood forecasting sites in North Bihar and East UP were shown as pink dots on CWC flood forecasting map on Aug 13-15, signifying that water level at these sites was above the danger level. This is possibly the beginning, this wave is expected to rise as it travels down towards Bihar and then W Bengal and Bangladesh. Continue reading “Ganga basin faces unprecedented floods in Aug 2017”
Above: Cover photo and map from NIDM report of Bihar floods 2007
Guest blog by Dr. Dinesh Kumar Mishra
Floods in East Champaran started following the heavy rainfall in the last week of July 1987. There was a sudden rise in the flood levels of the tributaries of the Burhi Gandak (Sikrahana) like the Sarisawa, the Tilawe, the Gaadh, and the Bangari leading to submergence of lower areas of Raxaul town where flood water of depth up to two to two and half feet was spread all over. This initial flood had also affected 25 Panchayats and 125 villages in the blocks of Raxaul and Ramgarhawa. The rains that set in on the 26th July, 1987 continued unabated and by the time of the beginning of August all the major rivers –the Gandak, the Burhi Gandak and the Bagmati were in spate. Road communication of Motihari, the district HQ of East Champaran, was disrupted fully in this very first spell of floods. There was three feet deep water passing over NH-28 near Chhapwa. The road to Bettiah and Areraj was too badly damaged to afford vehicular traffic to pass through. Road from Pipra Kothi to Siwan was already damaged much before the rains and its condition deteriorated further after rains. All the three rivers were flowing above danger mark on the 2nd August, 1987 and a vast cultivated area along with hundreds of villages came under a sheet of flood water of these rivers. The train service between Sugauli and Darbhanga was suspended because of flood water on the railway track. Continue reading “Bihar Floods in 1987 – II – East Champaran”
Above: Cover photo and map from NIDM report on Bihar floods of 2007
GUEST BLOG BY Dr. Dinesh Kumar Mishra (email@example.com)
Background Bihar faced the worst floods if its history in 1987, the records of which are yet to be bettered. In the preceding year of 1986 the flood was severe in many parts of Bihar but as the rainy season drew to close, the last October rains failed and a vast area of the State came under the grip of drought. Surprisingly, the districts cited for perennial floods like Saharsa, Purnea and Khagaria in the State were also hit by the drought. The year 1987, however, was worst for floods in Bihar (in addition to UP and W Bengal) while the rest of the country was facing one of the most severe droughts in the century. Many parts of the country were facing famine like situation while all the rain bearing clouds had moved toward Bihar. Traditionally, two days of continuous rains or a clear sky of the same duration during the rainy season signals floods or drought in the State and makes farmers apprehensive of the days to come. Continue reading “Bihar Floods of 1987-I”