Application was filled 6 months back everyone is called at 8. Crisil ratings for indian debt instrumentsmar 20 reuters. The principal end products of the complex will be high density polyethylene hdpe and linear low density polyethylene lldpe totaling 2, 20,000 tonnes. Erosion and weathering in the brahmaputra river system. Brahmaputra or the jamuna as it is known here joins padmameghna at. Bangladesh river eats up land and homes, trapping poor. Pdf bank erosion of the brahmaputra river and neotectonic. The south asia water initiative sawi organized a study tour to the mississippi river basin from june 1418, 2015 as part of its knowledge exchange activities in the brahmaputra basin. Understanding the brahmaputra and the annual flooding in assam. Abstract bank erosion is a major problem for river and floodplain management along the.
Erosion and fillups of brahmaputra river form 1966 to 2008. Statistically, this kind of flood is quite common and happens almost every 10 years. Nov 27, 2017 the brahmaputra board, under the ministry of water resources, had suggested constructing dams in assam and arunachal pradesh about 30 years ago, the subansiri project being one of them. A conservative model of an average daily economy in the river bank at dhubri 24. An analysis of the processes of river bank erosion. Bank erosion of the brahmaputra river and geomorphology around rohmoria area in assam, india, are found to be related to neotectonics as revealed by a study carried out using gis based on. Jan 25, 2014 thereafter severe erosion continued during the 1991 and 1992 rainy seasons, destroying more of meghai town and parts of two more villages.
Measurements of erosion have been made on sections of river banks in devon, england over a period of 2. The proposed method, including the bank erosion model, is applied to the lower reach of the brahmaputra river, which is. Ojha 3 abstract the present work explores relations between stream power, braiding intensities and bank erosion in. Bank erosion of the brahmaputra river and geomorphology around rohmoria area in assam, india, are found to be related to neotectonics as revealed. Bank erosion of the brahmaputra river and geomorphology around rohmoria area in assam, india, are found to be related to neotectonics as revealed by a study carried out using gis based on topographic maps surveyed in 1916 and 1963, seismotectonic map as. Brahmaputra and the socioeconomic life of people of assam 1. This westward shifting of the main channel caused severe bank erosion between 1972 and 1981 in kazipur.
Mar 20 reuters below are the ratings awarded by credit rating information service of india crisil for local debt instruments as of march 17, 2017. Economic activity profile of surveyed villages centred on brahmaputra 26. The sediments from the himalaya and the southern hills were deposited in the assam valley giving rise to full development of. Brahmaputrajamuna and old brahmaputra, with their main tributary tista, and a good number of small tributaries and distributaries constitute the largest floodplain of bangladesh. Impacts of river bank erosion on population displacement. The brahmaputra river flows by kaziranga national park in a braided course for about 53 km. Due to the river bank erosion and the channel migration, the assam valley portion of the brahmaputra river has lost approximately 7. Cyclical bank erosion and accretion is a feature of any braided river but in the case of the brahmaputra there is strong evidence that the right bank has been experiencing a substantial net erosion over the past 30 years. Working at brahmaputra cracker and polymer limited.
Introduction and the need for the study assam for ages together has been a riverine civilization, society and economy. Aana brahmaputra flooding and erosion searching for. It is thus difficult to build permanent structures on the river, and protective structures designed to limit the rivers erosional effects often face numerous issues during and after construction. The mighty brahmaputra river, which is one of the largest rivers in the world, is known by different names based on the region it flows through. Local scour around bank protection spur dykes on the. Although the 125 mile long brahmaputra right bank flood control embankment passes through the union, its perhaps misguided purpose boyce 1990.
Bcpl wins hr talent management leadership award for training and development presented by world hrd congress. This crosscontinental campaign was officially launched on 31 july 2009 at guwahati press club in presence of environmentalists, scholars and campaigners from both united kingdom and. Furthermore, unrelenting bank erosion process has caused channel widening which created navigation bottleneck zones in the brahmaputra river due to inadequate draught during nonmonsoon. Worsening erosion of brahmaputras banks uproots bangladeshi. The authors present an assessment of risk from river bank erosion in the brahmaputra river basin. Deemed one of the largest infrastructure projects in the northeast, the 6. Prediction for bank erosion and morphological changes of the jamuna river 2007, report for emin project of warpo, march 2007. Jamuna ganga padma brahmaputra factors that accelerate erosion. May 24, 2014 sarma jn, phukan m 2006 bank erosion and bankline migration of the river brahmaputra in assam, india, during the twentieth century. Pdf rs and gis based assessment of bank erosion in. At present, bank erosion and flood hazards in nearly 100 upazilas have become almost a regular feature. Bank erosion and protection on the brahmaputra jamuna river a. Brahmaputra erosion destroys nearly 4,000 sq km of assam.
Brahmaputrajamuna river most geomorphologically active braided rivers. Braiding process and bank erosion in the brahmaputra river. Impacts of river bank erosion on population displacement in the lower brahmaputra jamuna floodplain. Jan 20, 2016 brahmaputra or the jamuna as it is known here joins padmameghna at. River bank erosion hazard study of river ganga, upstream. Strengthening river basin management in the brahmaputra. The average flow of the river is around 19,300 cubic meterssec. Impacts of river bank erosion on population displacement in. First, recent research indicates the likely impact of climate change, with the temperature projected to increase in the brahmaputra basin in coming decades.
Brahmaputra cracker and polymer limited payable at dibrugarh, assam. Erosion pins were used and found to be satisfactory. Local scour around bank protection spur dykes on the brahmaputrajamuna river. Ith a population now in excess of 100 million and an area. Morphometric parameters, such as, sinuosity, braidedness index, and percentage of the island area to the total river reach area were measured for the year of 1955, 1977, 1990, 2001. The braiding index of the brahmaputra has been increasing from 6. Mar 23, 2017 due to the river bank erosion and the channel migration, the assam valley portion of the brahmaputra river has lost approximately 7. Excepting for a small portion in the north, the entire floodplain lies within the pleistocene terrace regions. In recent years, throughout the world, victims of environmental disasters are growing in number than the victims of.
During the same period, the average bank erosion along the right and left banks were 182 and 66 myear, respectively, the sum of which 248 myear is higher than the widening rate of the. By addressing both the physical hazard and the variations across the socioeconomic surface the approach presented attempts to spatially combine. The recent unprecedented floods, accompanied by the erosion of the brahmaputra, has brought the influencing factors of flood and erosion processes in assam into focus. Based on a survey of 547 randomly selected households, it was observed. Bank erosion has wiped out more than 2500 villages and 18 towns including sites of cultural heritage and tea gardens, affecting the lives of nearly 500 000 people. Fluvial process and morphology of the brahmaputra river in. In 1972 the westernmost channel of the brahmaputra river, locally known as daokoba, was a relatively minor stream in comparison with the main stream to the east. Understanding the brahmaputra and the annual flooding in. Very low erosion and width change occur in the upper meghna. See who you know at brahmaputra cracker and polymer limited. Bank erosion and protection on the brahmaputra jamuna river.
The concept of risk is conceptualised in the context of socioeconomic vulnerability, and the potential for exposure to hazard. According to banglapedia, the following rivers are vulnerable for bank erosion. The monsoons aint a good time to be on a boat on the river brahmaputra or anywhere near its banksid say, if the govt. Brahmaputrajamuna river system is one of the three major river systems of bangladesh.
When rivers enter the mature stage as in the case with the three mighty rivers, ganges, brahmaputra and meghna they become sluggish and meander or braid. River bank erosion induced human displacement and its consequences 7 2 river dynamics and erosion rivers are systems in dynamic equilibrium. Aug 28, 2011 this study has been carried out to analyze and report the river bank erosion hazard due to morphometric change of the ganga river also called ganges in english in the upstream of farakka barrage up to rajmahal. Brahmaputra flooding and erosion searching for solutions. Riverbank erosion, which is worsening with climate change, is more devastating than storms or floods because it takes. The lateral erosion distance at huayuankou will increase by 19% as the value of bank erodibility coefficient changes from 0. Bank erosion and protection on the brahmaputra jamuna. Brahmaputra and the socioeconomic life of people of assam. The model will generate spatial and temporal variations of flow water discharge, flow depth, flow velocity, sediment discharge, erosion, deposition, bed elevation changes, and bank erosion migration along the brahmaputra river based on conservations of water and sediment masses and momentum energy. The assessment of bank erosion in goalpara district part of brahmaputra river is done using geo spatial tools.
Stream bed lowering or in fill flooding of bank soils followed by rapid drops in flow saturation of banks from offstream source redirection and acceleration of flow within the. Learn about working at brahmaputra cracker and polymer limited. The total length of the ganga river from its source to its mouth measured along the hugli is 2,525 km. Jul 17, 2012 due to constant silt deposition of the mainstem brahmaputra and its tributaries, the channel crosssections over the years are becoming insufficient to safely carry the huge flow volume of 429. Scstph candidates are exempted from payment of above fees provided they attach an attested copy of sc st ph certificate as applicable, issued by the competent authority at the time of forwarding their application form. Bohagi utsav 2019 organised at bcpl township, barbaruah, dibrugarh, assam. Save the brahmaputra river is the first joint indobritish environmental project focusing on creating awareness about the ecological challenges faced by one of the worlds mightiest rivers. Bank erosion of the brahmaputra river and neotectonic. Numerical model for bank erosion in the brahmaputra river. The assam and west bengal portion of the brahmaputra river basin are mostly plain areas, whereas arunachal pradesh, meghalaya and nagaland parts are mainly covered by mountain ranges, hills and narrow valleys. River bank erosion hazard study of river ganga, upstream of.
A few other researchers have identified 56 upazilas with incidence of erosion. This could explain interactions with mass failure processes and timing of bank collapse. This study has been carried out to analyze and report the river bank erosion hazard due to morphometric change of the ganga river also called ganges in english in the upstream of farakka barrage up to rajmahal. Morphometric parameters, such as, sinuosity, braidedness index, and percentage of the island area to the total river reach area were measured for the. Bank erosion in the brahmaputra valleyimpact and causes the entire brahmaputra valley is at present reeling under a devastating flood.
In india, among all eastern and northeastern states, assam faces the most severe brunt of brahmaputra bank erosion. Local scour around a typical spur dyke on the brahmaputrajamuna river is studied. When river channels are altered under naturally dynamic. The high physical erosion and chemical erosion in the basin has both regional and global effects. Ojha 3 abstract the present work explores relations between stream power, braiding intensities and bank erosion in certain stretches of. Constrictions at majuli, shilghat, guwahati, and goalpara have been playing a major role in flooding and erosion of the river and have not received enough attention. Soil erosion and sediment deposit along brahmaputra river. It is found from the assessment that 59 km bank erosion in goalpara district part of. Brahmaputra erosion destroys nearly 4,000 sq km of assam land. A gis based study on bank erosion by the river brahmaputra. When river channels are altered under naturally dynamic hydrologic conditions, the river readjusts itself.
The brahmaputra river is disasterprone in spring, when the snow on the himalayan mountain ranges dissolves. Ith a population now in excess of 100 million and an area of. Before entering the bay of bengal, the ganga, along with the brahmaputra, forms the largest delta of the world between the bhagirathihugli. Worsening erosion of brahmaputras banks uproots bangladeshi village families. The peak flow of the brahmaputra during this wave of flood at pandu was about 39000 cubic meters per sec cumec. Feb 05, 2015 downstream of chandpur, the westward bank erosion during the period 19841993 was severe, with the rate of erosion at times getting as high as 824 myear. Bank erosion in the brahmaputra valleyimpact and causes. Hazard, vulnerability and risk on the brahmaputra basin. Worsening erosion of brahmaputra s banks uproots bangladeshi village families. During the twentieth century, the total amount of bank area lost from erosion was 868 km 2. U11101as2007goi008290 page 2 of 6 the complex is spread over 3000 bighas of land at lepetkata, and situated at approximately 15 kilometres away from the tea city dibrugarh. The continuous retirements and unabated erosion causes heavy loss to the valuable homestead and fertile agricultural lands, besides evacuation of thickly populated riverine dwellers. This study has attempted to focus on dimensions and impacts of displacement by river bank erosion in the lower brahmaputra jamuna floodplain of bangladesh.
The mighty brahmaputra has wiped out nearly 4,000 square kilometres of area at a rate of 80 square kilometres per year, destroying more than 2500 villages and affecting more than five million people i. River bank erosion in bangladesh linkedin slideshare. By 1981 daokoba was one of the prominent channels in the braided river system. Even today largely it continues so, albeit, recent changes in its social and economic structures. Bank protection and river training along the braided. Thereafter severe erosion continued during the 1991 and 1992 rainy seasons, destroying more of meghai town and parts of two more villages.
The brahmaputra river is an antecedent river as it is older than the himalaya that are rising since the miocene times. The meandering tributaries change because of neck cutoff and progressive shifting at the meander bends. More than 700 rivers, with their tributaries and dis tributaries have crisscrossed the country forming a network of river system. The brahmaputra river experiences high levels of bank erosion usually via slab failure and channel migration caused by its strong current, lack of riverbank vegetation, and loose sand and silt which compose its banks. Significant areas of prime inhabited land are lost every year to river erosion in the brahmaputra river basin. The following rivers are vulnerable for bank erosion. Studies have shown that erosion rateis the highest in the jamuna river. Jun 22, 2016 kurigram, bangladesh thomson reuters foundation piyara begum once had a happy life in garuhara village by the brahmaputra river in northern bangladesh, but worsening erosion of the river banks.
The brahmaputra river in assam has several constrictions as can be seen in goggle map. A method is proposed to predict bank erosion and sand bar migration in river reaches where suspended sediment transport is dominant. Kurigram, bangladesh thomson reuters foundation piyara begum once had a happy life in garuhara village by the brahmaputra river in northern bangladesh, but worsening erosion of the river banks. The brahmaputra is a major river system of the world characterized by exceedingly high rates of basin erosion causing immense longterm destruction every year. Some researchers have reported that bank erosion is taking place in about 94 out of 489 upazilas of the country.
River bank erosion induced human displacement and its. This crosscontinental campaign was officially launched on 31 july 2009 at guwahati press club in presence of environmentalists, scholars and campaigners. Downstream of chandpur, the westward bank erosion during the period 19841993 was severe, with the rate of erosion at times getting as high as 824 myear. It is thus difficult to build permanent structures on the river, and protective structures designed to limit the rivers. Sequential changes in the position of banklines of the river due to consistent bank erosion have been studied from survey of india topographic maps of 19121916 and 1972, satellite irs liss iii images from 1998 to 2008 using gis. Jun 10, 2010 the monsoons aint a good time to be on a boat on the river brahmaputra or anywhere near its banksid say, if the govt. Strengthening river basin management in the brahmaputra basin. Riverbank erosion an endemic and recurrent natural hazard in bangladesh.
1041 1290 1352 408 1091 215 714 629 1018 791 999 220 1383 1278 1635 207 718 511 1636 326 760 1000 285 899 48 960 772 1012 433 1150 135 1123