China
Africa
Explore chapters and articles related to this topic
1
Published in Yared Abayneh Abebe, Modelling Human-Flood Interactions, 2021
We develop a coupled ABM-flood model that uses PMT as a tool to model households’ flood vulnerability reduction behaviour for the FRM case of Wilhelmsburg, a quarter of Hamburg, Germany. The Wilhelmsburg quarter is built on a river island formed by the branching River Elbe, as shown in Figure 5.1. Most areas in Wilhelmsburg are just above sea level. Thus, flood defence ring of dykes and floodwalls protect the quarter. In 1962, a hurricane-induced storm surge (5.70 m above sea level) overtopped and breached the dykes, and more than 200 people lost their lives and properties were damaged due to coastal flooding in Wilhelmsburg (Munich R.E., 2012). As a result, the authorities heightened and reinforced the coastal defence system. According to the Munich RE report, after 1962, eight storm surges of levels higher than 5.70 m occurred (most between 1990 and 1999), but none of the events caused any damage as coastal protection has been improved.
7
Published in Mohammad Gharesifard, Community-Based Monitoring Initiatives of Water and Environment: Evaluation of the Establishment Dynamics and Results, 2021
As explained in the background of this case study (Section 4.1), Grip op Water Altena is located in ‘Land van Heudsen en Altena’. This is a river island located in the estuary of the rivers Rhine and Meuse. It is enclosed by the rivers Boven Merwede (north), Afgedamde Maas (east) and Oude Maasje/Bergse Maas (south) and by the region of De Biesbosch (west). Inhabitants living in land van Heudsen en Altena form the potential pool of participants in this CBM (i.e. roughly 55000 people).
Fluoride contamination and abatement measures
Published in Manish Kumar, Sanjeeb Mohapatra, Kishor Acharya, Contaminants of Emerging Concerns and Reigning Removal Technologies, 2022
Gogoi and Ruby (2008) have studied the fluoride removal of kaolinite obtained from local traditional potter of Majuli river island, Assam. The study has attempted using raw kaolinite and activated kaolinite clay with conc. H2SO4. The results suggest the feasibility of using both the materials for defluoridation, but raw kaolinite has shown lower performance as compared to activated adsorbent.
Media reporting on conflicts and cooperation: what does it mean for the Brahmaputra basin?
Published in International Journal of Water Resources Development, 2023
Arundhati Deka, Natasha Hazarika, Sumit Vij, Anamika Barua, Emanuele Fantini
Our analysis shows that the Bangladesh media covers how millions are affected every year, several losing their lives, erosion of thousands of hectares of agricultural land, breakage of schools and healthcare facilities, thereby challenging the overall socio-economic well-being of the region (Bangladesh Pratidin, 2015; Prothom Alo, 2020). India’s national newspaper reports suggest that the region is being devoured by flood and erosion every year, as in the autumn of August 1970 (The Hindu, 2020a) or in the summer of June 2020 (The Hindu, 2020b). Similarly, various reports also suggest a looming threat to the geographical and cultural relevance of the affected areas. For instance, Majuli, a district in Assam, the ‘largest river island in the world’, has been eroded from 800 to less than 400 km2 (Dainik Assam, 2010a; Karmakar, 2018) and several historic places of cultural importance are damaged by annual floods and erosion (Dainik Assam, 2014a).
Chinook Salmon habitat evolution following river restoration, drought, and flood
Published in Journal of Ecohydraulics, 2022
Rocko A. Brown, Kirsten Sellheim, Jesse T. Anderson, Joseph E. Merz
Patterns of channel change in the upper section above the middle bend pool near station 800 were generally low-magnitude but widely distributed across the channel within the point bars (Figure 4E, F). No statistically significant channel change was recorded on the alternate point bars. Channel change in the lower section below station 900 was more extensive, with larger patches of erosion bounded by patches of deposition. Depositional patches were mostly along banks, such as on river right between stations 575 and 650 and on river left between stations 450 and 575. The downstream end of the central bar riffle near station 700 eroded along with the south portion of a channel bar below station 700. Some of this material was likely routed to the depositional patch on river right just below the island, forming a point bar. Thus, it appears that channel change in this section was driven by flow steering from the middle bend pool located near station 800. The lower most island of the island-riffle complex located near station 500 experienced low magnitude erosion (e.g. 0.2 to 0.4 m), while the intermediate low flow channels experienced low magnitude deposition ranging from 0 to 0.12 m. The depositional patch on river left near station 500 ranged from 0.3 to 0.8 m. This material likely originated from the upstream river left erosion patch, as the high flow patterns observed in the field showed flow following the main channel alignment with no cross-stream flow steering by the river islands, which would have been submerged. There was lateral erosion adjacent to the downstream most river island above station ∼450.
Sedimentation and erosion at Majuli Island, Assam, India: analysis of paleo-depositional environment
Published in International Journal of River Basin Management, 2022
Sangram Mishra, Dipika Dutta, Ananda Badekar, Anil Kumar Misra
The study is concentrated entirely on Majuli Island (Figure 1), the largest inhabited freshwater river island, now functioning as a full-fledged district for a couple of years, with extreme points (according to Majuli Cultural Landscape Management Authority) of the core area at 27°06′11” N, 94°10′25” E (North); 26° 49′ 29″ N, 94° 09′ 33″ E (South); 27° 05′ 09″ N, 94° 31′ 10″ E (East); 26° 47′ 01″ N, 93° 44′ 47″ E (West) and of buffer area at 27° 21′ 26″ N, 94° 11′ 03″ E (North); 27° 12′ 22″ N, 94° 07′ 35″ E (South); 27° 12′ 23″ N, 94° 46′ 32″ E (East); 26° 46′ 19″ N, 93° 35′ 03″ E (West). The elevation of the island from the mean sea level is about 84 metres. The island is on a hedge to extinction from two serious problems: one, from significant loss of land area due to severe bank erosion and the other, seasonal and continuous flood inundation. The crisis has resulted in a great threat to the inhabitants and the demography of the region including socio-economic factors.