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Extreme Wind Characteristics of coastal communities in Bayelsa State: Implications for Community Planning and Development in Nigeria

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Atmospheric and Climate Sciences 2016年第2期6卷 180-189页

作者： Vincent Ezikornwor Weli Jimmy O. Adegoke Douye Pere-Ere Wodu Department Of Geography And Environmental Management Faculty of Social Sciences University Of Port Harcourt Port Harcourt Nigeria Department of Geosciences University of Missouri-Kansas City Kansas City USA

The study examined extreme wind characteristics of the coastal communities in Bayelsa State, Nigeria for possible community planning and development. To achieve this aim, data on wind speed were sourced from the Nigerian Meteorological Agency (NIMET). Personal interview and focused group discussions were done with the aid of well structured questionnaire in the various coastal communities sampled to identify impact and coping strategies from extreme winds. The Beaufort Winds Scale and regression analysis were the statistical tools used for the analysis of the data in order to achieve the objectives of the study. The results indicate that, the return period to obtain maximum 1-year wind speed value of 29.3 m/s (violent storm), 27.8 m/s (storm), 24.3 m/s (strong Gale) and 20.6 m/s (fresh Gale) will be 17 years, 5.7 years, 2.8 years and 1.4 years respectively. Fresh Gale characterized the extreme wind events in the area. Result further showed that out of 19 occurrences of wind events, 11 were extreme cases, while 2 occurred as violent storm of 29.3 m/s. Findings also showed that extreme winds occurred more (8 cases) during the early part (March-April) of the raining season when the area is under the influence of maritime moisture laden air mass than the dry season which is dried and dusty. Using a combination of return period of the magnitude of extreme wind and the log of wind speed for the 16 years a model predicting the incidence of extreme wind was done. Awareness on the dangers of wind hazard increases while early warning systems are advocated to mitigate the associated dangers with extreme wind events in the study area.

关键词： Extreme Winds Gale coastal communities coastal Storms Wind Hazards

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Situational Analysis Climate Change Impacts on the Livelihood and Adaptive Solutions of the coastal communities:A Case of Phu Tan District,Ca Mau Province

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Journal of Environmental Science and Engineering(B) 2021年第6期10卷 237-250页

作者： Pham Chi Trung Duong Quoc Huy Doan Van Hue Nguyen Văn Chien Center for Training and International Cooperation Vietnam Academy for Water ResourcesHa Noi City 11555Viet Nam South Institute for Water Resources Researches HCM City 750100Viet Nam

The Mekong River Delta has 7 coastal provinces including Tien Giang,Ben Tre,Tra Vinh,Soc Trang,Bac Lieu,Ca Mau and Kien ***,Ca Mau province which exposes to both the East and West sea with a coastline of 254 m(6 coastal districts:Dam Doi,Nam Can,Ngoc Hien,Phu Tan,Tran Van Thoi,U Minh)in the recent years,has been severely influenced by climate *** Ca Mau province has lost nearly 10,000 ha of land and coastal forests;infrastructure and properties of local people along rivers have been eroded and seriously damaged;production activities are vulnerable to sea level rise and other hydro-meteorological *** life of coastal people mainly depends on agricultural *** main income is agricultural production,forestry,aquaculture and *** paper aims to provide a situational analysis on how climate change and natural disasters affect the livelihoods of coastal communities in Ca Mau Province.A case study is conducted for Phu Tan District that addresses problems and proposes urgent measures for climate change adaptation in the near-and long-term planning.

关键词： Climate change livelihood coastal communities Ca Mau province

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Are some communities of the coastal dune zonation more susceptible to alien plant invasion?

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Journal of Plant Ecology 2010年第2期3卷 139-147页

作者： M.Carboni R.Santoro A.T.R.Acosta Dipartimento di Biologia Ambientale Universita`degli Studi di Roma TreViale Marconi 44600146 RomaItaly

Aims coastal areas,and in particular coastal dunes,are ecosystems strongly affected by the invasion of alien ***,few attempts have ever been made to quantify alien species incidence in different communities along the coastal *** work aims to analyze the distribution of alien plants along the coastal zonation of sandy shores on the Tyrrhenian coast,addressing specifically differences among plant communities in abundance of alien *** The study was performed on recent dunes(Holocene)of the central western coast of *** selected dune landscapes where invasion processes were particularly *** plots were randomly sampled and through cluster analysis,we identified six plant communities corresponding to the typical zonation described for the Tyrrhenian sandy coast of Central *** evaluated and compared frequency and abundance of invasion in these different ***,we investigated how propagule pressure(measured using as proxy human structures)contributed to the observed invasion *** Findings We found a relatively low total number of aliens but also a differential distribution pattern and strong abundance of some of the aliens in specific sectors of the vegetation *** perennial community of transition dunes appears most affected by invasion processes,related almost exclusively to the frequent and widespread Carpobrotus *** alien species reaches high cover values,apparently lowering cover of native species of transition dune plant *** levels of invasion in the transition dune can be partially explained because of greater propagule pressure in this section of the dune *** findings thus have important conservation and management implications since transition dune communities with Crucianella maritima are rare and protected(sensu Habitat 92/43/EEC Directive)along the entire Italian coast.

关键词： level of invasion propagule pressure Carpobrotus aff.acinaciformis Central Italy coastal communities

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Mangrove Ecosystem Services: Indus Delta (PQA), Sindh

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Journal of Geoscience and Environment Protection 2016年第7期4卷 179-184页

作者： Shahid Amjad Muhammad Ajaz Rasheed Mirza Aqeel Baig Institute of Business Management (IoBM) Karachi Pakistan

Mangroves of the Indus Delta are the world’s fifth largest assemblage, and the largest in the arid zone. Mangroves of Indus delta (PQA) provide immense benefits, products and unrecognized regulatory services. Products of Direct Economic Value: Fish, Minerals and food. There are Products of Natural System (intangible) supplies of rich nutrients to support productivity. coastal communities benefit in a multitude of ways from Mangrove ecosystems. Collectively, these benefits are known as ecosystem services. The ecological role of mangrove ecosystems in the Indus Deltaic area of Port Qasim Authority (PQA) is, economically and socially significant. The Mangroves are well known for their high biological productivity and their consequent importance provided to the coastal community in terms of services and products of direct and indirect value to the adjacent coastal waters. Mangrove Ecosystem services are regularly involved in the provisioning of food and services and the decomposition of organic wastes. They export organic matter, mainly in detritus form of leaf litter to the marine environment, thus providing a highly nutritious food source for themselves and for the Benthic and terrestrial animals found in the mangrove areas, as well as for those in neighboring estuarine and marine ecosystems. Apart from nutrient export, mangroves also contribute to offshore fisheries by acting as nurseries and shelters for many species of commercially important finfish and crustaceans. Degradation of Indus Deltaic mangrove in PQA would destabilize the economic potential and the livelihood of communities’ which include services and benefits offered by the mangrove ecosystem. Rehabilitation and conservation of mangroves ecosystem in PQA is essential for sustained biological productivity in the region.

关键词： Mangrove Ecosystem Services Biological Productivity coastal communities

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