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14 results for “Delta Change”
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Research ArticleOpen accessEvery word in the titleLong-Term Changes in Mangrove Landscape of the Niger River Delta, NigeriaPing Wang, Aroloye O. Numbere, Gerardo R. CamiloThe Niger Delta mangrove is the third largest in the world and the largest in Africa. Since the 1960s oil and gas exploration has become an important economic activity, resulting in significant alteration of the landscape via pollution, urbanization and invasion. Landsat images of six different years (1984, 1986, 2000, 2003, 2005 and 2007) were used to determine land cover … …American Journal of Environmental Sciences, Vol. 12, Issue 3 · 18 Jun 2016 · 8,839 accessesView PDFCite
Research ArticleOpen accessIn the keywordsCLIMATE CHANGE IMPACT ASSESSMENT ON WATERSHED HYDROLOGY: A COMPARISON OF THREE APPROACHESSomsubhra Chattopadhyay, Manoj K. JhaSeveral methods of impact assessment have been developed over the years which basically incorporate future climate projections of atmospheric-ocean circulation based climate models into the simulation of land surface hydrological processes. This study attempted to evaluate three methods of climate change impact assessment: (a) Frequency perturbation method, (b) direct method and (c) delta change method. A well-calibrated hydrologic model, Soil … …American Journal of Engineering and Applied Sciences, Vol. 7, Issue 1 · 27 Mar 2014 · 8,597 accessesView PDFCite
Review ArticleOpen accessIn the abstractNasa Selects Concepts for a New Mission to Titan, the Moon of SaturnRelly Victoria Petrescu, Raffaella Aversa, Antonio Apicella, Florian Ion Tiberiu PetrescuNasa just has selected two new concepts for some new robotic missions, one of which aims to explore potential landing sites on Saturn’s largest moon, Titan. This first concept is named Dragonfly, which is a drone-like rotorcraft that would use the environment on Titan to fly to a number of locations to sample materials and determine surface composition to examine … …Journal of Aircraft and Spacecraft Technology, Vol. 2, Issue 1 · 19 Jan 2018 · 12,003 accessesView PDFCite
Research ArticleOpen accessIn the abstractSubsidence Inferred from a Time Lapse Reservoir Study in a Niger Delta Field, NigeriaChukwuemeka Ngozi Ehirim, Tamunonengiyeofori DagogoProduction-induced subsidence due to compressibility and fluid property changes in a Niger delta field has been investigated using well log and 4D seismic data sets. The objective of the study is to evaluate changes in time lapse seismic attributes due to hydrocarbon production and infer to probable ground subsidence. Petrophysical modeling and analysis of well data revealed that Density (ρ), … …Current Research in Geoscience, Vol. 6, Issue 2 · 25 Oct 2016 · 8,216 accessesView PDFCite
Research ArticleOpen accessIn the abstractPetrophysical Characterization and Flow Models for Agbada Reservoirs, Onshore Niger Delta, NigeriaPrince Suka Momta, John Owate Etu-Efeotor, Charles Ugwu UgwuezeThree selected reservoirs (XB, XC and XE) from three wells (A, B and C) occurring within the Agbada producing sands in part of the Greater Ughelli Depobelt of the onshore Niger Delta have been studied. The study aims at evaluating the petrophysical characteristics of the sand-bodies and also identifies the various flow units present within each reservoir. Petrophysical parameters were … …Current Research in Geoscience, Vol. 5, Issue 2 · 21 Oct 2015 · 7,910 accessesView PDFCite
Research ArticleOpen accessIn the abstractSedimentology and Ichnology of Late Oligocene Delta Front Reservoir Sandstone Deposit, Greater Ughelli Depobelt, Niger DeltaRaphael Oaikhena Oyanyan, Michael Ndubuisi OtiSedimentological and ichnological study of cored reservoir sands correlated with wireline logs between two wells, 0.8 km distance apart along dip direction, enabled vertical and cross sectional facies variability assessment aimed at determining intra sand-body continuity in longitudinal or down-dip direction; and sub-environments of deposition and factors that controlled depositional processes. Ten lithofacies described 62 meters cores of the reservoir … …Current Research in Geoscience, Vol. 5, Issue 1 · 30 Jul 2015 · 7,829 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Impact of Anthropogenic Activities Recorded By Mercury in the Sediment from Dianshan LakeHui Zhang, Nan Zhang, Qi Yang et al.The mercury in sediment cores from Dianshan Lake, Shanghai is studied in this study and it indicates that the mercury level changing from 52.78-145.66 µg kg-1 in sediment can be obviously divided into three sections responding to the development of economy of Shanghai. Mercury decreases with depth in 0-11 cm underground, which is corresponding to the depositing period after 1980; … …American Journal of Environmental Sciences, Vol. 8, Issue 4 · 4 Aug 2012 · 7,018 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Land Uses' Consequences in Coastal Area of Faliraki and Delta Penaeus River in GreeceAgisilaos EconomouProblem statement: The areas of Faliraki and Delta Pinaeus river is presented with downgrade in natural resources that has a direct affect on the future development of these areas. This research investigated (i) whether land uses have downgraded the coastal areas (ii) to which degree the determination of land uses can play an important role in the reduction of environmental … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 1 · 31 Mar 2009 · 7,995 accessesView PDFCite
Research ArticleOpen accessIn the abstractPredictive Dynamics of Channel Pattern Changing Trends at Arial Khan River (1977-2018), BangladeshRathindra Nath Biswas, Md. Juel Mia, M. Nazrul IslamArial Khan River is right bank distributary of Ganges-Padma River systems flowing southwest region of Bangladesh. It is morphologically very dynamic meandering river: where the delta-building process is more active than other distributaries of Ganges-Brahmaputra-Meghna (GBM) River basin. This study analyzes, morphological variables- channel length, valley length, channel area and channel patterns of Arial Khan River. A major portion of … …Current Research in Geoscience, Vol. 8, Issue 1 · 16 Nov 2018 · 9,800 accessesView PDFCite
Research ArticleOpen accessIn the abstractLong-Term Characterization of Landfill Leachate: Impacts of the Tropical Climate on its CompositionJorge Luiz da Paixão Filho, Miriam Gonçalves MiguelThe disposal of Municipal Solid Waste (MSW) in sanitary landfills produces leachate, whose composition changes depending on the microbial community and the environmental conditions. However, these changes cannot be observed in sanitary landfill because of the superposition of cells, which makes it difficult to determinate the relationship among the phases of biodegradation of MSW, the composition of the leachate and … …American Journal of Environmental Sciences, Vol. 13, Issue 2 · 14 Mar 2017 · 8,573 accessesView PDFCite