Heavy late-monsoon rainfall caused severe flooding along the Gandak River in India and Nepal. Satellite imagery posted by NASA’s Earth Observatory proves that there is water overflowing from the rivers, flooding the seasonal diara farms and villages in more than 200 villages in the West Champaran, Saran, and Muzaffarpur districts of Bihar state.
Official data from Nepal's Department of Hydrology and Meteorology showed the river gauge at Devghāṭ peaking at 11.94 meters on September 27 which is the highest water level recorded since measurements began in the 1960s.
In Bihar, the downstream monitoring stations at Bagaha, Dumariaghat, Rewaghat, and Lalganj recorded record-high water levels, necessitating the deployment of boats and helicopters by disaster relief teams.
What is Latest Gandak River Flood Impact Across Bihar and Nepal
Severe runoff from headwater catchments overwhelmed regional flood structures, prompting emergency measures across both countries.
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Nepal Border Region: Rains from the monsoon season in the provinces of Lumbini and Gandaki flooded quickly into the main stream of the river, thus exceeding the safety levels.
Bihar Inundation: The floodwaters broke through the bunds in West Champaran and the adjacent areas, inundating hundreds of villages and parts of the Valmiki Tiger Reserve.
Disaster Response: The Indian Air Force and the local emergency services dropped vital supplies and evacuated people stuck in low-lying areas.
What is the Old Name of Gandak River?
This Himalayan river is prone to floods and disasters, which makes it a hot topic of regular discussion around its course and origin history. But do you know what the old name of the Gandak River is?
In ancient Vedic literature, the river is called Sadanira (which means perpetual water or ever-flowing stream).
According to the historical Sanskrit text Shatapatha Brahmana, the Sadanira marked the traditional eastern frontier during the early Aryan expansion toward the ancient kingdom of Videha.
In Sanskrit literature, the river is also known as the Gandaki or Narayani. The upper riverbed remains famous worldwide for producing Shaligram stones which is black fossilised ammonites worshipped in Hindu traditions.
Gandak River Forms a Short Border Between UP and Bihar
Apart from its historic name, another intriguing aspect of the river Gandak that one must know is that it acts as a boundary of short length between UP and Bihar.
It is the Gandak River that forms a natural interstate boundary between UP and Bihar in parts of its course.
Coming into the country through the country of Nepal from the Valmiki Nagar region, it traverses the border of Maharajganj and Kushinagar districts of UP and West Champaran district of Bihar.
Geographical Facts about Gandak River Origin and Course
Understanding the origin of the Gandak River explains why sudden rainfall triggers rapid downstream flooding.
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Geographical Feature
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Details about Gandak River
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Origin Point
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Confluence of the Kali Gandaki and Trisuli rivers in the Great Himalaya Range, Nepal
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Source Elevation
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Glacial headstreams rising above 6,000 meters in the Mustang region
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Course & Route
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Flows as the Narayani in Nepal, forms part of the UP-Bihar border, and enters the Ganga opposite Patna
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Total Length
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Approximately 765 kilometers (475 miles)
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The abrupt fall from the Himalayas' highest glaciers results in fast-moving waters that soon get directed to the low-lying northern plains of Bihar during heavy monsoon rains.
The Gandak River continues to be a crucial source for flood control operations in northern India. Proper embankment formation and hydrological observation from both sides of the border will continue to be a critical requirement.