Question

You think that the discharge of the water in the kosi river in general and the kosi in particular, remains the same, or does it fluctuate

Answer 1

The Kosi river in north Bihar plains, eastern India presents a challenge in terms of long and recurring flood
hazard. Despite a long history of flood control management in the basin for more than 5 decades, the river
continues to bring a lot of misery through extensive flooding. This paper revisits the flooding problem in
the Kosi river basin and presents an in-depth analysis of flood hydrology. We integrate the hydrological
analysis with a GIS-based flood risk mapping in parts of the basin. Typical hydrological characteristics of
the Kosi river include very high discharge variability, and high sediment flux from an uplifting hinterland.
Annual peak discharges often exceed the mean annual flood and the low-lying tracts of the alluvial plains
are extensively inundated year after year. Our flood risk analysis follows a multi-parametric approach using
Analytical Hierarchy Process (AHP) and integrates geomorphological, land cover, topographic and social
(population density) parameters to propose a Flood Risk Index (FRI). The flood risk map is validated with
long-term inundation maps and offers a cost-effective solution for planning mitigation measures in flood

Answer 2

Answer

• 742 million tons of sediment has been stored in the Chhatra to Birpur stretch of Kosi River over the most recent 54 years, finds another investigation

• Kosi, the distress of Bihar, has stayed a riddle for specialists and policymakers for the quantity of separations it has had till date causing tremendous floods without fail. It was as later as 2008 when it penetrated the dike in Kushaha (Nepal) and moved 108 km eastwards.

• The reason behind the hardships for those living along the banks of Kosi could be 1,082 million tons of residue that has been saved in it over the most recent 54 years. This has turned out in an investigation directed by educator of earth sciences at IIT Kanpur, Rajiv Sinha. "Our first request gauges propose that the all out mass of silt amassed among Chhatra and Birpur (two check stations of Kosi in upstream area) during the post-dike period could be approximately1,082 million tons. This converts into 408 million cubic meters as far as volume and this may have gathered at a pace of 5.33 cm every year," says Sinha.

• This is the most noteworthy measure of residue statement in any waterway of the Ganga Basin, educator Sinha advised Down to Earth over telephone on Thursday from Patna after the proper arrival of the report there within the sight of a few priests. Crafted by developing banks on the two sides of Kosi was finished in 1955-56 and the period after that is called post-dike period. Sinha determined these figures by dregs planning—averaging the decadal silt information of the most recent 54 years.

• There are three measuring stations accessible in Kosi waterway stream—Chhatra to Birpur (upstream) and Birpur to Baltara (downstream). While Birpur and Baltara lie in Bihar, Chhatra falls in Nepal. The measuring stations have gear introduced to note to consider stature, release, substance properties of water and different properties.