scholarly journals Damage Estimation using Shock Zones: A case study of Amphan tropical cyclone

2021 ◽  
Author(s):  
Medha ◽  
Biswajit Mondal ◽  
Gour Doloi
Keyword(s):  
Tropical Cyclone ◽  
Rapid Assessment ◽  
Coastal Region ◽  
Unit Price ◽  
Economic Damage ◽  
Damage Estimation ◽  
Price Approach ◽  
Shock Zone ◽  
Relief Efforts

Abstract The tropical cyclone affects millions of people living in the coastal regions. The changing climate has led to an increased intensity and frequency of cyclones, therefore increasing the damage caused to people, the environment, and property. The Bay of Bengal is most prone to tropical cyclones, which affects Bangladesh and the eastern coastal region of India due to geographical proximity. Hence, a comprehensive understanding of the inundation damage and intensity caused becomes essential to focus the relief efforts on the affected districts. This study identified the shock zone and assessed the inundation associated damage caused by recent cyclone Amphan in the area of Bangladesh and West Bengal in India. The shock zonation was based on the track of cyclones, cyclone wind speed zones, elevation, wind impact potentiality, and agricultural population area. The identification of the affected area was done using integrated Landsat and SAR data, and economic damage cost was assessed using the Asian Development Bank’s (ADB) Unit price approach. The total people affected due to inundation are 2.4 million in India and 1.4 million in Bangladesh and the damage totaled up to 5.4 million USD. The results of this study can be used by concerned authorities to identify the shock zones and be used for rapid assessment of the damages.

scholarly journals Damage Estimation using Shock Zones: A case study of Amphan tropical cyclone

2021 ◽  
Author(s):  
Medha ◽  
Biswajit Mondal ◽  
Gour Doloi ◽  
S.M. Tafsirul Islam ◽  
Murari Mohan Bera
Keyword(s):  
Tropical Cyclone ◽  
Rapid Assessment ◽  
Coastal Region ◽  
Unit Price ◽  
Economic Damage ◽  
Damage Estimation ◽  
Price Approach ◽  
Shock Zone ◽  
Relief Efforts

Abstract The tropical cyclone affects millions of people living in the coastal regions. The changing climate has led to an increased intensity and frequency of cyclones, therefore increasing the damage caused to people, the environment, and property. The Bay of Bengal is most prone to tropical cyclones, which affects Bangladesh and the eastern coastal region of India due to geographical proximity. Hence, a comprehensive understanding of the inundation damage and intensity caused becomes essential to focus the relief efforts on the affected districts. This study identified the shock zone and assessed the inundation associated damage caused by recent cyclone Amphan in the area of Bangladesh and West Bengal in India. The shock zonation was based on the track of cyclones, cyclone wind speed zones, elevation, wind impact potentiality, and agricultural population area. The identification of the affected area was done using integrated Landsat and SAR data, and economic damage cost was assessed using the Asian Development Bank’s (ADB) Unit price approach. The total people affected due to inundation are 2.4 million in India and 1.4 million in Bangladesh and the damage totaled up to 5.4 million USD. The results of this study can be used by concerned authorities to identify the shock zones and be used for rapid assessment of the damages.

scholarly journals Vessel Strikes of Large Whales in the Eastern Tropical Pacific: A Case Study of Regional Underreporting

2021 ◽  
Vol 8 ◽  
Author(s):  
Nicola Ransome ◽  
Neil R. Loneragan ◽  
Luis Medrano-González ◽  
Fernando Félix ◽  
Joshua N. Smith
Keyword(s):  
United States ◽  
Rapid Assessment ◽  
Coastal Region ◽  
Developed Countries ◽  
Tropical Pacific ◽  
Eastern Tropical Pacific ◽  
Small Vessels ◽  
True Number ◽  
Fishing Fleets

Vessel strike is recognized as a major modern threat to the recovery of large whale populations globally, but the issue is notoriously difficult to assess. Vessel strikes by large ships frequently go unnoticed, and those involving smaller vessels are rarely reported. Interpreting global patterns of vessel strikes is further hindered by underlying reporting biases caused by differences in countries’ research efforts, legislation, reporting structures and enforcement. This leaves global strike data “patchy” and typically scarce outside of developed countries, where resources are more limited. To explore this we investigated vessel strikes with large whales in the Eastern Tropical Pacific (ETP), a coastal region of ten developing countries where heavy shipping and high cetacean densities overlap. Although this is characteristic of vessel strike “hotspots” worldwide, only 11 ETP strike reports from just four countries (∼2% of total reports) existed in the International Whaling Commission’s Global Ship Strike Database (2010). This contrasts greatly with abundant reports from the neighboring state of California (United States), and the greater United States/Canadian west coast, making it a compelling case study for investigating underreporting. By reviewing online media databases and articles, peer review publications and requesting information from government agencies, scientists, and tourism companies, we compiled a regional ETP vessel strike database. We found over three times as many strike reports (n = 40), from twice as many countries (n = 8), identifying the geographic extent and severity of the threat, although likely still underestimating the true number of strikes. Reports were found from 1905 until 2017, showing that strikes are a regional, historic, and present threat to large whales. The humpback whale (Megaptera novaeangliae) was the most commonly hit species, and whale-watch industries involving small vessels in areas of high whale densities were recognized as a conservation and management concern. Industrial fishing fleets and shipping were suggested to be underrepresented sectors in the database, and are likely high-risk vessels for strikes with whales. We demonstrate the implications of known vessel strike reporting biases and conclude a more rapid assessment of global vessel strikes would substantially benefit from prioritized research efforts in developing regions, with known vessel strike “hotspot” characteristics, but few strike reports.

scholarly journals Effect of River Salinity on Crop Diversity: A Case Study of South West Coastal Region of Bangladesh

2014 ◽  
Vol 8 ◽  
pp. 29-37 ◽  
Author(s):  
Animesh K. Gain ◽  
Kul P. Aryal ◽  
Pritish Sana ◽  
Md Nazim Uddin
Keyword(s):  
Negative Impact ◽  
Saline Water ◽  
Coastal Region ◽  
Saline Water Intrusion ◽  
South West ◽  
Agricultural Diversity ◽  
Structured Questionnaire ◽  
Local Farmers ◽  
Saline Zone

Saline water intrusion is a major problem and conflicting issue in south-west coastal region of Bangladesh. The increased salinity has negative impact on agricultural diversity in this region. The present study provides an assessment of perception of local farmers about changes of agricultural diversity mainly diversity of vegetable species (both summer and winter) and standing plants with the changes of salinity level in the nearby river. This study was carried out in January to August 2005 through semi-structured questionnaire in selected villages of different salinity prone areas such as high saline zone and moderate saline zone, namely Paikgacha and Rampal, respectively. The study has revealed that in Paikgacha, the salinity varies approximately within the range from 20,000 to 45,000 micro-mhos and in Rampal it is from 10,000 to 30,000 micro-mhos. Due to increased salinity, the summer vegetable species in Paikgacha and Rampal have been reduced from 16 to 2 and 15 to 9 respectively during the period 1975-2005. For winter vegetable species, this figure wasreduced from 13 to 9 in Paikgacha but in Rampal this number remained unchanged. Standing plant species in Paikgacha and Rampal have been reduced from 31 to 14 and 35 to21 respectively during that period. Agricultural diversity is reducing in substantial rate both spatially and temporally.Nepal Agric. Res. J. Vol. 8, 2007, pp. 29-37 DOI: http://dx.doi.org/10.3126/narj.v8i0.11576

scholarly journals ESTIMATION OF WORST-CLASS TROPICAL CYCLONE AND STORM SURGE, AND ITS RETURN PERIOD -CASE STUDY FOR ISE BAY-

2015 ◽  
Vol 71 (2) ◽  
pp. I_1513-I_1518 ◽  
Author(s):  
Yoko SHIBUTANI ◽  
Sota NAKAJO ◽  
Nobuhito MORI ◽  
Sooyoul KIM ◽  
Hajime MASE
Keyword(s):  
Tropical Cyclone ◽  
Storm Surge ◽  
Return Period ◽  
Ise Bay
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