Sea-level rise and human migration

Nature Reviews Earth & Environment, Journal Year: 2019, Volume and Issue: 1(1), P. 28 - 39

Published: Dec. 9, 2019

Language: Английский

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Spatio-Temporal Patterns of Land Use/Land Cover Change in the Heterogeneous Coastal Region of Bangladesh between 1990 and 2017

Remote Sensing, Journal Year: 2019, Volume and Issue: 11(7), P. 790 - 790

Published: April 2, 2019

Although a detailed analysis of land use and cover (LULC) change is essential in providing greater understanding increased human-environment interactions across the coastal region Bangladesh, substantial challenges still exist for accurately classifying LULC. This due to existence high-level landscape heterogeneity unavailability good quality remotely sensed data. study, first kind, implemented unique methodological approach this challenge. Using freely available Landsat imagery, eXtreme Gradient Boosting (XGBoost)-based informative feature selection Random Forest classification used elucidate spatio-temporal patterns LULC areas over 28-year period (1990–2017). We show that XGBoost effectively addresses issue high spectral complexities image data, successfully augmenting RF model performance (providing mean user’s accuracy > 0.82). Multi-temporal maps reveal Bangladesh’s experienced net increase agricultural (5.44%), built-up (4.91%) river (4.52%) past 28 years. While vegetation decrease (8.26%), an increasing trend was observed years since 2000, primarily Bangladesh government’s afforestation initiatives southern belts. These findings provide comprehensive picture patterns, which will be useful policy makers resource managers incorporate into environmental management practices. work also provides insights future research address spatial data heterogeneous landscape.

Language: Английский

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Sea Level Rise and the Dynamics of the Marsh-Upland Boundary

Frontiers in Environmental Science, Journal Year: 2019, Volume and Issue: 7

Published: Feb. 27, 2019

During sea level rise, salt marshes transgress inland invading low-lying forests, agricultural fields, and suburban areas. This transgression is a complex process regulated by infrequent storms that flood upland ecosystems increasing soil salinity. As result vegetation replaced halophyte marsh plants. Here we present review of the main processes feedbacks regulating transition from to marshes. The goal provide process-based framework enables development quantitative models for dynamics marsh-upland boundary. Particular emphasis given concept ecological ratchet, combining press disturbance rise with pulse storms.

Language: Английский

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Rice production and food security in Asian Mega deltas—A review on characteristics, vulnerabilities and agricultural adaptation options to cope with climate change

Journal of Agronomy and Crop Science, Journal Year: 2020, Volume and Issue: 206(4), P. 491 - 503

Published: July 14, 2020

Abstract Asian Mega deltas (AMDs) are among the world´s most important rice‐growing areas and vital for food security. This review describes major environmental agricultural characteristics as well current future threats to production livelihood, using three AMDs examples, namely Ganges–Brahmaputra delta in Bangladesh, Ayeyarwady Myanmar Mekong River Vietnam. In addition, we analysed widely used adaptation methods these areas. The threat agriculture is salinity intrusion water scarcity, which consequently leads a shortage of irrigation yield reduction. common applied strategies use salt‐tolerant varieties adjustment cropping calendars, water‐saving technologies. It was found that there many concepts address individual problems, but comprehensive integrated concept regions adapt climate change still missing.

Language: Английский

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Ecosystem Services for Well-Being in Deltas

Springer eBooks, Journal Year: 2018, Volume and Issue: unknown

Published: Jan. 1, 2018

Language: Английский

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Effect of Salinity Intrusion on Food Crops, Livestock, and Fish Species at Kalapara Coastal Belt in Bangladesh

Journal of Food Quality, Journal Year: 2017, Volume and Issue: 2017, P. 1 - 23

Published: Jan. 1, 2017

Salinity has caused significant negative effects on agricultural production. This research is focused the vulnerabilities of soil and water salinities crop, fish, livestock production across Kalapara coastal belt Bangladesh. Several parameters were measured as indicators salinity. The electrical conductivity was found to be with TDS, F − , Cl ,SO42-, Na + K Ca 2+ Mg id="M2">N2-, andP3-. Chloride identical with2-,3-, id="M10">

Language: Английский

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Can Bangladesh produce enough cereals to meet future demand?

Agricultural Systems, Journal Year: 2016, Volume and Issue: 163, P. 36 - 44

Published: Nov. 17, 2016

Bangladesh faces huge challenges in achieving food security due to its high population, diet changes, and limited room for expanding cropland cropping intensity. The objective of this study is assess the degree which can be self-sufficient terms domestic maize, rice wheat production by years 2030 2050 closing existing gap (Yg) between yield potential (Yp) actual farm (Ya), accounting possible changes area. Yield gaps were calculated three crops using well-validated crop models site-specific weather, management soil data, upscaled whole country. We assessed grain six land use change scenarios (general decrease arable land; declining ground water tables north; fallow areas south; effect sea level rise; increased intensity; larger share cash crops) levels Yg closure (1: no increase; 2: at a equivalent 50% (50% closure); 3: 85% Yp (irrigated 80% water-limited or Yw (rainfed (full closure)). In addition, demand with low population growth rates, substitution maize future diets also examined. Total aggregated cereals (in milled equivalents) 2050, based on UN median variant, projected 21 24% higher than 2010. Current represent rice), 48-63% 49% wheat), 40% 46% maize), 44% maize) their Yw. With various self-sufficiency ratio will > 1 about one but well below both 2050. full closure, ratios above all jointly scenarios, except scenario drastic boro area allow expansion crops. Full needed compensate decreases increases, then even some large amounts imports required satisfy future. results analysis have important implications other countries rate, shrinking rapid urbanization, highly vulnerable climate change.

Language: Английский

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Population dynamics, delta vulnerability and environmental change: comparison of the Mekong, Ganges–Brahmaputra and Amazon delta regions

Sustainability Science, Journal Year: 2016, Volume and Issue: 11(4), P. 539 - 554

Published: May 26, 2016

Tropical delta regions are at risk of multiple threats including relative sea level rise and human alterations, making them more vulnerable to extreme floods, storms, surges, salinity intrusion, other hazards which could also increase in magnitude frequency with a changing climate. Given the environmental vulnerability tropical deltas, understanding interlinkages between population dynamics change these is crucial for ensuring efficient policy planning progress toward social ecological sustainability. Here, we provide an overview trends Ganges-Brahmaputra, Mekong Amazon deltas. Using data sources, census Demographic Health Surveys, discussion regarding components undertaken context factors affecting demographic landscape three regions. We find that all cases broadly reflective national trends, although important differences exist within across study areas. Moreover, have been experiencing shifts structures resulting aging populations, latter being most rapid delta. The impacts on different important, extensive research required effectively quantify underlying relationships. paper concludes by discussing selected implications sustainable development beyond.

Language: Английский

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Agricultural livelihoods in coastal Bangladesh under climate and environmental change – a model framework

Environmental Science Processes & Impacts, Journal Year: 2015, Volume and Issue: 17(6), P. 1018 - 1031

Published: Jan. 1, 2015

We describe a novel integrated modelling system aiming to approximate the impact of environmental change on farmers' livelihoods in Bangladesh.

Language: Английский

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Integrated assessment of social and environmental sustainability dynamics in the Ganges-Brahmaputra-Meghna delta, Bangladesh

Estuarine Coastal and Shelf Science, Journal Year: 2016, Volume and Issue: 183, P. 370 - 381

Published: Sept. 13, 2016

Language: Английский

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