by Chandan Kumar Duarah 26 September 2018
Early warning is must cope with floods and people along the Brahmaputra heaved a sigh of relief as authorities in Indian states of Assam and Arunachal geared up to face any eventualities. This did not happen in the preceding weeks when people in Kerala or Nagaland and Assam were caught off guard in some of the worst human-made disasters.
This year the Meteorological Department has been warning of a deficit monsoon, and there prevailed a drought-like situation in many parts of upper Assam. In the eastern part of the Golaghat district, villagers resorted to the age-old practice of Bhekulir Biya (marrying of frogs) to satisfy the rain gods! When conditions were such, the news of the Dhansiri river breaking the highest flood level mark at Numaligarh in Golaghat district in the early hours of Aug 2, 2018, not only confused the weather forecasting authorities but caught almost a million people off-guard. It was simply unprecedented.
Going by the IMD’s daily district level rainfall, there has not been unprecedented rainfall in the Dhansiri River catchment in the preceding week of August 2. Instead, the unprecedented flash floods in Dhansiri and the Doyang rivers that flow through Nagaland and Assam was brought by the Doyang dam situated on the River Doyang, a tributary of the River Brahmaputra, located in Wokha district of Nagaland.
The 75 MW Doyang Hydroelectric Power Project owned by North Eastern Electric Power Corporation Limited (NEEPCO)– the Central government company that owns and operates the dam wreaked havoc downstream claiming five lives as NEEPCO opened the gates of the dam.
By August 6, the Assam State Disaster Management Authority put the number of affected persons at 87,300 and 7,086 hectares of land in Golaghat district were under water. The deluge left a trail of destruction ravaging some 120 villages. Sediment and slush-filled up hundreds of wetlands in the catchment.
Flood in Tran-boundary Rivers
Affected states in India has witnessed such disasters due to most of the trans-boundary rivers. The high waves of Siang (the Tsangpo or Yarlung Zangbo in China) reminded inhabitants of June 2000 midnight when a 30-feet high wave of Siang had submerged the historic township killing at least 30 people, and more than 100 had gone missing. People were fast asleep and none expected to flood as there was no rain. Siang is the main headwater of the Brahmaputra, and it contributes at least 20-30% percent of water to the Brahmaputra. Flood and its effects are very much seen in Assam. It is the ninth largest river in the world with 19,800 cubic metre per second by discharge, and the 15th longest is also one of the few rivers in the world that exhibit a tidal bore. It is said that water breaks some natural dam formed in the Himalayas and heavy water has been contributed to the Siang and flow with high waves and becomes turbulent.
It is believed that the latest turbidity of the Siang water is connected with the landslide dams that developed on the course of the river in Bayi District and rampant mining in southern China. Tensions rose when China unveiled a new mine in Lhunze, near the de facto border with India’s northeastern state of Arunachal Pradesh, east of Bhutan. The mine sits on a deposit of gold, silver, and other precious metals worth up to $60 billion.
Dams on the Brahmaputra or its tributaries either in Tibet, China or in Arunachal Pradesh, India are a matter of grave concern. The study of the December 10, 2017 satellite imagery captured by the European Space Agency’s Sentinel -2 undertaken by research scholars Chintan Sheth of the Bengaluru-based National Centre for Biological Research (NCBS) and Anirban Datta-Ray of the Ashoka Trust for Research in Ecology and the Environment (ATREE) had led to the conclusion that three dams were formed on the Yarlung Tsangpo, in the Bayi District of Nyingchi County of Tibet.
Downstream people in India are against building dams either in the Chinese or Indian side. The lingering bitterness resurfaced late last year when the more raucous sections of the Indian media began to buzz with a new China conspiracy story – the blackening of the Brahmaputra river in northeastern India. Seizing on a lawmaker’s allegation that Chinese excavations were releasing extraordinary levels of slag in the water, several media outlets saw in the discolouring a “sinister plot” from across the border. China and India’s geopolitical-resources rush threatens the safety of this entire river system.
The new Lhunze mine’s position among the Brahmaputra’s headwaters is so precarious that its owner, Hua Yu Mining, was allowed to mine there. .” The mine is liable to be damaged by the region’s frequent earthquakes. It was suspected that any toxic leak from Lhunze flowed straight into the Brahmaputra.
An Indian television channel, Times Now, for example, claimed “exclusive” laboratory results to “expose” China’s evil design to “poison” and “divert” the river through mining and dam-building. China eventually refuted the media reports, saying an earthquake in Tibet that had caused large-scale landslides was responsible for the change of colour, a view echoed by the Indian government. This incident again revived demands for China to share hydrological data, with Indian lawmakers alleging that China was using its status as an upper riparian state to punish India.
New Delhi had then blamed China for breaking an earlier agreement to share hydrological data. In 2006, India and China had signed a pact under which China would share hydrological data from May 15 to October 15 every year for the Brahmaputra and Sutlej rivers, both of which originate in Tibet. The two sides renewed the agreement in memorandums of understanding signed in 2013 and 2015. But when floods struck northeastern India last year, reports surfaced that China was not adhering to the agreement. There was speculation that China held back on the data in retaliation for the 73-day military stand-off between Indian and Chinese soldiers in Doklam near Bhutan around the same time. On its part, China said its hydrological systems were washed away by floods, as a result of which it was unable to share data.
In October-November 2017, the Siang turned dark with sediment, so much, so that fish and animals were dying. As the turbidity of the river began before it entered the Indian territory, there was much speculation about Chinese activity being behind the change which prompted political leaders from the region to write to Prime Minister Narendra Modi requesting him to take up the matter with China.
Experts, journalists, and activists from Assam demanded trans-national cooperation for agriculture, meteorology and flood mitigation and other purposes.
It is a wholly different story this year, which marked a high point in bilateral relations when Indian Prime Minister Narendra Modi and Chinese President Xi Jinping met in May for an “informal summit” to reset strained ties. One of the two key pacts reached at the end of the summit requires China to provide hydrological data during the flood season from May 15 to October 15 every year, and if water levels exceed mutually agreed limits during the non-flood season.
The river had turned muddy and got cleaned by April 2018. Several scientific studies in subsequent periods held an earthquake of 6.4 magnitudes on the Richter scale in Tibet as a strong reason for generating enough dirt to turn the colour of the water from crystal clear to black. It is worth mentioning here that two Indian scientists working on the Brahmaputra had found three artificial, landslide-induced dams on the Yarlung Tsangpo (the Chinese name of the Siang), containing accumulated water of around one billion cubic metres. The dams were formed following the November 17, 2017 earthquake of 6.4-magnitude that shook the Nyingchi County of Tibet.
Virulent Siang River
The Yarlung Zangbo in Arunachal Pradesh, India turned destructive with unusually high waves in last July. But the reason behind such changes in the river, which generate the significant chunk of flow of the Brahmaputra, could not be determined. The water of the river had also turned blackish with high turbidity again. The Central Water Commission (CWC) maintained that since the end of the part of July, the river is behaving in such a manner and also carrying turbid water. Many residents they had such waves in the rive never in their life and were not sure of the reasons behind such a phenomenon. The causes of the unusual behavior could either be human-made or natural. Last year, China clarified that it would not pollute its river, Yarlung Yarlung or Tsangpo in Tibet.
However, the high waves of the river are confined only to river’s reaches in Pasighat area of Arunachal Pradesh, and no impact of this changed behaviour of the river is felt in the downstream regions of Assam. The Yarlung Zangbo takes the name of Siang as it enters India at Gelling in Upper Siang district. Two other rivers– Lohit and the Dibang –join the Siang at Kobu Chapori in Assam about 30 km downstream of Pasighat, which is about 230 km from the international border to form the mighty Brahmaputra. The unusually high waves in the Siang river have created fear among the people of the two Arunachal Pradesh districts, and the administration had cautioned the people to refrain from venturing into it for fishing, swimming, and other activities.
Nobody could detect the cause of this, and we had been apprehensive about the phenomenon. The Chinese side neither reacts nor informed about natural or unnatural activities on their side. After around one month later China informed Delhi as well as Indian Government that it had been heavy rain in Tibet or South China region and it may cause a flood in downstream areas in India. The high waves had been seen since July 2018.
On August 29, 2018, China alerted India of a massive cloudburst in Tibet that forced the Chinese authorities to release more water down the Brahmaputra than at any time over the last 50 years. The discharge was measured at 9,020 cubic metres per second (cumec) at 8 a.m. on August 29 and led to huge waves on the Siang in Arunachal Pradesh. An eyewitness said the wave heights at up to four metres, uncharacteristic of a river. It gave hydrological data and flood warning to the Government of India. As soon as Delhi received this information, the concerned department sent the message to State Government of Arunachal Pradesh as it is the next bordering state of China.
The East Siang Deputy Commissioner (DC) Tamiyo Tatak in a circular issued on 29th of August stated that the Tsangpo river has been swelling with a discharge of 9,020 cumecs on August 29th morning, which broke the record of last five decades. The very next day of the flood alert, the Indian Air Force rescued 29 people stranded on an island of the Siang.
Following the report of torrential downpour in the Tsangpo basin in China, which was relayed to the Arunachal government by the Government of India, sounded alert of possible deluge by the Siang river and asked the people residing in low lying areas to refrain from venturing into the river and nearby water bodies to prevent any eventualities.
Dhemaji and Dibrugarh in Assam had sounded alert of deluge due to the unprecedented rise of water in Siang River, creating panic among the people living in downstream Assam. The Dibrugarh district administration referring to a report warned the people of unprecedented rise of water level in the Brahmaputra river that might cause a severe flood on the left bank. The administration in an order
issued today also asked the government officials not to leave the district headquarters and stay alert to deal with the situation.
Dhemaji district administration asked the people of riverine villages to be ready for shifting to safer places. The district administration, however, urged the people not to panic as the water resources department is keeping a vigil on the situation, and any impending danger would be informed to the people in advance. Downstream, the Assam State Disaster Management Authority (ASDMA) warned the district administrations in the eastern part of the state to be on high alert on August 30.
There was nothing to panic as the Central Water Commission (CWC) had reported that the water level at the Grand Canyon of Tsangpo on August 14 was 8070 cumec and an increase should not inflict severe damages, Arunachal government officials said quoting the Chinese communication. Of course, Indian Air Force helicopters rescued 19 people stranded on an island in the Siang in the Sille-Oyan area on the morning of August 31.
As per Ravi Ranjan, superintendent engineer of the Central Water Commission (CWC) – It’s certainly a relief. “The overall flood situation in Brahmaputra and Barak basin is well within control; there is no need for any alarm, all the tributaries are running well below danger levels. Real-time information sharing by China has certainly helped prepare better.” Ninong Ering, a member of parliament from Arunachal, was among the first to officially acknowledge that China’s early warning helped, enabling residents of the East Siang district of Arunachal to move to higher grounds.
It has been a hurdle for riparian countries to mitigate water and weather-related problems without a proper mechanism data sharing, weather forecasting, and flood mitigation. And for the first time, Indian state governments issued flood alerts based on data received from China. The Assam State Disaster Management Authority (ASDMA) agreed on the signal from China but “made a difference.” ASDMA officials said although India had developed its own hi-tech satellite imaging systems which could pick up disturbances on the ground, the information was insufficient without ground data from China.
After long efforts from diplomats, experts, activists, and journalists China had agreed with a request from lower riparian India and Bangladesh and the country with headwater of Brahmaputra are providing data. It is a positive sign towards good trans-boundary river management. Extending cooperation will lead towards better collaboration between neighbouring countries. Exchange of hydrological data and weather forecasting are critical since a trans-national river belongs to many countries. Transfer of hydrological data and weather forecasting are significant since a trans-national river belongs to many countries in the region. Not only the Brahmaputra, five rivers originating on the third-pole, the Himalayas. They are the Yangtze, the Indus, the Mekong, the Salween, and the Ganges – rank among the world’s ten most endangered rivers.
As science and environmental journalists, we had an opportunity to meet Chinese journalists and experts through the different programme. The Thirdpole and Earth Journalism Network (EJNet) gave us the opportunity to interact with Chinese counterpart, and we insisted Chinese experts and journalists to work intending to having bilateral or multilateral transboundary river management pact. Ninong Ering, a member of parliament from Arunachal, was among the first to officially acknowledge that China’s early warning helped, enabling residents of the East Siang district of Arunachal to move to higher grounds.
Even though the Chinese authorities released 9020 cumec of water on the Yarlung Zangbo in Tibet, China, due to heavy rainfall in Tibet, Arunachal Pradesh and Assam had nothing to worry. For at Pashighat, in Arunachal Pradesh, the Siang is 756 metres. And at Jonai, where the river enters Assam, the width of the river is around 4 km, and hence the water level of the river would rise only 30 cm there. The Union Water Resources Ministry official said Indian experts have analysed the data shared by China and came to the conclusion that the effect may not be so strong in the country even though it was an alarming situation in China.
The early warning China issued to India in August on the rising waters of its Tsangpo river – which hit its highest level in 150 years – gave the Indian authorities enough time to prepare. Thousands of people in scores of districts in Assam and Arunachal have been affected in the latest floods, but the losses are minimal in comparison with the devastation last year, which killed 130 people and left three million people stranded.
As China informed India about heavy rain in Tibet or probable flood in downstream areas, the Indian Government informed and cautioned Arunachal Government. A senior official of the Union Water Resources Ministry said it was an unprecedented situation on the Chinese side where Tsangpo broke a 150-year record with swollen waters and hence China has shared the information with India.
Anyway, Delhi should inform or involve Assam with the process equally with Arunachal Pradesh. Assam been victim of devastating floods of every year. Thousands of hectares of land has been affected by the Brahmaputra and its tributaries. Since vast floodplains and flood-affected areas belong to Assam, the state needs more time to be prepared after getting the flood warning. The annual rainfall in many parts of the northeast is much higher than the southern coastal State. The densely populated floodplains of Assam thus have to worry because of changes in land use that have impacted the micro-climate adversely.
Both India and China are fast-growing economies and technological clout, and resources that can help resolve regional and global challenges. The Himalayas are now subject to accelerated glacial thaw, climatic instability, and biodiversity loss. What a difference a year can make in China-India relations. Some Indian media houses interpreted the release of water in a wrong way that might generate panic among people in the downstream. China did not respond or reacted to any allegation about the release of water from any dam.
As China is exploiting minerals from Yarlung Zangbor region in Tibet, India is building dams in Arunachal Pradesh to generate a tremendous amount of hydropower. Most of the river catchment is in Arunachal Pradesh, which is controlled by India but claimed by China. The region was militarised during the 1962 war and has since been inundated by troops, roads, airports, barracks, and hospitals. These have caused deforestation, landslides, and river pollution.
All of this development and strategic activities along the border is built on the world’s third-largest ice-pack or in biodiversity hotspots. The environmental impacts of their continued entrenchment are rarely mentioned, even though they are significant and growing. The build-up of troops on the border has displaced local ethnic groups, and they have been encouraged to give up their grazing land to make way for intensive farming. Animal habitats have decreased, and clashes with wildlife like tigers and snow leopards have increased. Population transfers and agricultural intensification have even heightened the risk that antibiotic-resistant super-bugs and other toxic pollutants will seep into the world’s most diffused watershed.
China’s leading English daily, The South China Morning Post writes “Just a year ago China was being blamed for a deluge in northeastern India. Now, following its tip-off about the rising waters of the Tsangpo, it is being praised for minimising the damage”. Just a year ago China was being blamed for a deluge in northeastern India. Now, following its tip-off about the rising waters of the Tsangpo, it is being praised for minimising the damage. Anyway, the latest fruitful data sharing opens the door to a better understanding of the river, dam as well as trans-boundary river management.