Texture and mineralogy of sediments from the Ganges-Brahmaputra-Meghna river system in the Bengal Basin, Bangladesh and their environmental implications

1997 ◽  
Vol 30 (3-4) ◽  
pp. 181-188 ◽  
Author(s):  
D. K. Datta ◽  
V. Subramanian
Keyword(s):  
River System ◽  
Bengal Basin ◽  
Environmental Implications ◽  
The Ganges

Clay mineral compositions in surface sediments of the Ganges-Brahmaputra-Meghna river system of Bengal Basin, Bangladesh

2019 ◽  
Vol 412 ◽  
pp. 27-36 ◽  
Author(s):  
Md Hafijur Rahaman Khan ◽  
Jianguo Liu ◽  
Shengfa Liu ◽  
Ashraf Ali Seddique ◽  
Li Cao ◽  
...  
Keyword(s):  
Clay Mineral ◽  
Surface Sediments ◽  
River System ◽  
Bengal Basin ◽  
Mineral Compositions ◽  
The Ganges

Distribution of C, N and P in the sediments of the Ganges–Brahmaputra–Meghna river system in the Bengal basin

1999 ◽  
Vol 30 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Dilip K Datta ◽  
Lallan P Gupta ◽  
V Subramanian
Keyword(s):  
River System ◽  
Bengal Basin ◽  
The Ganges

scholarly journals Downstream and seasonal changes of lithium isotope ratios in the Ganges‐Brahmaputra river system

2017 ◽  
Vol 18 (8) ◽  
pp. 3003-3015 ◽  
Author(s):  
Takuya Manaka ◽  
Daisuke Araoka ◽  
Toshihiro Yoshimura ◽  
H. M. Zakir Hossain ◽  
Yoshiro Nishio ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
River System ◽  
Isotope Ratios ◽  
Lithium Isotope ◽  
Brahmaputra River ◽  
The Ganges

Beyond Barrages and Boundaries

2012 ◽  
Author(s):  
Cheryl Colopy
Keyword(s):  
River System ◽  
The United States ◽  
The West ◽  
Ganges Basin ◽  
The World ◽  
Transboundary Water Management ◽  
The Right ◽  
International Border ◽  
The Ganges ◽  
Eastern Edge

A low dam girdles the Ganga about sixty miles beyond Bhagalpur. More than a mile and a half across, the structure is the longest barrage in the world. It has 109 gates, almost twice as many as the Koshi barrage I traveled over near the Nepal-India border. Its name, Farakka, is anathema to people throughout Bangladesh. In India mainly fishermen on the Ganga know much about it. The barrage, which sits just eleven miles from the international border that separates the tiny nation from its big neighbor, has poisoned relations between the two governments for forty years. The story of Farakka is one of the thorniest river disputes on the subcontinent. Whole books have been written about it on both sides of the border as well as by international commentators, not to mention the technical treatises it has engendered. The barrage did not accomplish the task for which it was built and has harmed people in both India and Bangladesh. Farakka offers a warning about how not to handle transboundary rivers to prevent complex subcontinental watersharing problems from becoming crises in the future. Borders fragment the river system in the Ganges basin, creating unique transboundary water management challenges. To visualize the Indian subcontinent’s river-sharing problems, imagine a slice of pizza. Take a bite out of the middle of the bumpy top crust. That’s Nepal. Then take a small bite out of the right, or eastern edge, just below the crust. That’s Bangladesh. The rest of the slice is India. These three nations share the greater Ganges basin. The river spills into the Bay of Bengal in Bangladesh after flowing across the wide top part of India. Many of the river’s major tributaries come from Nepal. The smaller slice of pizza to the west would include Pakistan and the Indus River, but that’s another complicated story. Now move the piece of pizza to North America and pretend the United States is the majority of the slice.

From the Punjab to Pattala

2020 ◽  
pp. 234-264
Author(s):  
Waldemar Heckel
Keyword(s):  
Monsoon Season ◽  
River System ◽  
Indus River ◽  
The World ◽  
End Of The World ◽  
The Ganges ◽  
Direct Attack

The campaign in the Punjab saw Alexander, supported by his Indian ally Taxiles, attack Porus, who lived beyond the Hydaspes River. The battle, at the beginning of the monsoon season, involved a division of the Macedonian forces. One part faced Porus at the river crossing, where the current and the elephants in the Indian army made a direct attack virtually impossible. Alexander took a portion of his army and marched upstream. Once across the river, he drew Porus away from his defensive position and defeated the Indian ruler in a battle fought primarily by cavalry, although the Macedonian pikemen inflicted injuries on the elephants, which became a danger to their own troops. After the Hydaspes victory, Alexander advanced to the Hyphasis (Beas), where the army refused to cross in order to march to the Ganges. The whole episode was contrived, since Alexander clearly had no intention of going farther east. His failure to reach the eastern end of the world was thus attributed to the timidity and war-weariness of his soldiers. During the descent of the Indus river system, Alexander received a near-fatal wound at the hands of the Mallians. Once he recovered, Alexander conducted a series of bloody massacres as he sailed to the mouth of the Indus and accomplished his goal of sailing out into the ocean. Although the Indian campaign was by far the bloodiest of the expedition, there was little long-term gain from the conquest.

Shelf sedimentation off the Ganges-Brahmaputra river system: Evidence for sediment bypassing to the Bengal fan

Geology ◽  
1989 ◽  
Vol 17 (12) ◽  
pp. 1132 ◽  
Author(s):  
Steven A. Kuehl ◽  
Tina M. Hariu ◽  
Willard S. Moore
Keyword(s):  
River System ◽  
Brahmaputra River ◽  
Bengal Fan ◽  
Shelf Sedimentation ◽  
The Ganges

scholarly journals Arsenic contamination of groundwater in the Kathmandu Valley, Nepal, as a consequence of rapid erosion

2010 ◽  
Vol 40 ◽  
pp. 49-60 ◽  
Author(s):  
Steven H. Emerman ◽  
Tista Prasai ◽  
Ryan B. Anderson ◽  
Mallory A. Palmer
Keyword(s):  
Geometric Mean ◽  
Sulfide Oxidation ◽  
River System ◽  
Flood Plain ◽  
Kathmandu Valley ◽  
Ganges River ◽  
Transition Elements ◽  
Dug Wells ◽  
The Ganges ◽  
System Water

Elevated levels of arsenic (As) in groundwater in the flood plain of the Ganges River have been well-documented over the past decades. The objective of this study was to measure As and the transition elements normally associated with As in the Kathmandu Valley in Nepal, a heavily populated tectonic valley in the upper reaches of the Ganges River system. Water samples were collected from six shallow tubewells (depth < 50 m), eight deep tubewells and 13 dug wells and stone spouts. Electrical conductivity, temperature and pH were measured on-site and concentrations of As, Fe, Cu, Ni, Co, Mn, Zn and Cr were measured with a spectrophotometer. Five tubewells and four dug wells had As levels exceeding the Nepal Interim Standard (As = 0.05 mg/L). There was no statistically significant clustering of As levels either with depth or horizontal location. Arsenic was uncorrelated with either Fe (R2 = 0.096), Mn (R2 = 0.0004) or any combination of transition elements (R2 < 0.083), which is inconsistent with both the reduction-dissolution and the sulfide oxidation models for As release. The geometric mean As level of groundwater (As = 0.015 mg/L) was indistinguishable from the geometric mean As level of surface water (As = 0.013 mg/L) obtained from 48 river samples from the Kathmandu Valley in a previous study. We are suggesting that elevated groundwater As results not from subsurface redox conditions, but from losing streams with elevated As, which is a consequence of rapid erosion caused by a combination of monsoon climate, tectonic uplift and deforestation.

scholarly journals Sustained wood burial in the Bengal Fan over the last 19 My

2019 ◽  
Vol 116 (45) ◽  
pp. 22518-22525 ◽  
Author(s):  
Hyejung Lee ◽  
Valier Galy ◽  
Xiaojuan Feng ◽  
Camilo Ponton ◽  
Albert Galy ◽  
...  
Keyword(s):  
Woody Debris ◽  
Low Frequency ◽  
River System ◽  
Fine Sediments ◽  
Bengal Fan ◽  
Sedimentary Deposit ◽  
Coniferous Wood ◽  
International Ocean Discovery Program ◽  
Sediment Layers ◽  
The Ganges

The Ganges–Brahmaputra (G-B) River system transports over a billion tons of sediment every year from the Himalayan Mountains to the Bay of Bengal and has built the world’s largest active sedimentary deposit, the Bengal Fan. High sedimentation rates drive exceptional organic matter preservation that represents a long-term sink for atmospheric CO2. While much attention has been paid to organic-rich fine sediments, coarse sediments have generally been overlooked as a locus of organic carbon (OC) burial. However, International Ocean Discovery Program Expedition 354 recently discovered abundant woody debris (millimeter- to centimeter-sized fragments) preserved within the coarse sediment layers of turbidite beds recovered from 6 marine drill sites along a transect across the Bengal Fan (∼8°N, ∼3,700-m water depth) with recovery spanning 19 My. Analysis of bulk wood and lignin finds mostly lowland origins of wood delivered episodically. In the last 5 My, export included C4 plants, implying that coarse woody, lowland export continued after C4 grassland expansion, albeit in reduced amounts. Substantial export of coarse woody debris in the last 1 My included one wood-rich deposit (∼0.05 Ma) that encompassed coniferous wood transported from the headwaters. In coarse layers, we found on average 0.16 weight % OC, which is half the typical biospheric OC content of sediments exported by the modern G-B Rivers. Wood burial estimates are hampered by poor drilling recovery of sands. However, high-magnitude, low-frequency wood export events are shown to be a key mechanism for C burial in turbidites.

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