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    Wyświetlanie 1-4 z 4
    Tytuł:
    Ionic composition of rainwater from different sampling surfaces across selected locations in Rivers State, Nigeria
    Autorzy:
    Omokpariola, Daniel Omeodisemi
    Nduka, John Kanayochukwu
    Omokpariola, Patrick Leonard
    Omokpariola, Elshalom Chioma Onomeda
    Powiązania:
    https://bibliotekanauki.pl/articles/1031790.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Anions
    Cations
    Nigeria
    Rainwater quality
    Rivers State
    Opis:
    This study seeks to assess the impact of pH from an array of ions interactions in rainwater samples across different sampling surfaces (ambient, zinc roof, aluminium roof, asbestos roof and stone-coated roof) and locations (Ogale, Eleme, Rumuodomaya/Rumuodome, Obio-Akpor, Diobu, Port-Harcourt and Chokocho, Etche) in Rivers State, Nigeria. Rainwater were sampled from April, 2019 to October, 2019, prepared and analysed for pH, Cl¯, SO42–, NO3¯, NO2¯, PO43–, HCO3¯, Na+, K+, Mg2+, Ca2+, NH4+ and Al3+.using standard procedure. Statistical and Factor analysis was estimated to give ionic impacts on rainwater quality. The results showed that pH across different sampling surfaces ranged from 6.26 – 7.02 with decreasing location as Rumuodomaya/Rumuodome > Diobu > Chokocho > Ogale which impacts on different cation and anion interactions. Factor analysis showed cumulative variance of 88.79% for ambient, 87.58% for zinc roof, 86.49% for aluminium roof, 89.57% for asbestos roof and 65.89% for stone-coated roof across all four locations which are due to industrial and biomass emission, agricultural, metabolic and mining activities on chemical composition. Therefore,
    Źródło:
    World Scientific News; 2020, 150; 132-147
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Potential Ecological Risk Index and Metals Residue in Tropical Brackish Water Snail (Pachymelania byronensis Wood, 1828) of the Lower Niger River Basin, Nigeria
    Autorzy:
    Ikpesu, T. O.
    Ezenwaka, C. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177853.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Heavy metals
    Pachymelania byronensis
    Potential ecological risk index
    Rivers
    Sediments
    Snail
    Water
    Opis:
    The potential ecological risk index (RI) was employed to evaluate water quality and sediment pollution of heavy metals in the fish Town Rivers, Nigeria. The propensity of the presence of the heavy metals residue in a common brackish water snail (Pachymelania byronensis) that serves as food for human was also examined. Fine-grained surficial sediments from natural depositional zones were collected using Ekman dredge, pooled together and analyzed for the present of heavy metals. The snail samples were randomly hand-picked from the edge of the Rivers or attached to the substrata from August, 2017 to January, 2018 depicting wet season (August - October) and dry season (November - January). A total of 144 P. byronensis (24 per station) were sampled for this investigation. The concentrations of the heavy metals concentration in the sediments and snail tissues were analyzed using graphite furnace absorption spectrometry. The order of occurrence of the metal in the snail is Zn > Cu > Fe > Pb > Cd and their levels remain within their permissible safe levels for human consumption as stipulated by the various regulatory bodies. The risk factor for the metals in the sediments revealed that the Rivers is moderately at risk, which may not pose serious environmental threat and health risks to the resident organisms, but may be magnify along the trophic level. Therefore, sensitization of the inhabitants becomes inevitable, since the level is at threshold, above which may be detrimental.
    Źródło:
    World Scientific News; 2018, 98; 78-88
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natural Diminishing Trend of the Tigris and Euphrates Streamflows is Alarming for the Middle East Future
    Autorzy:
    Yıldız, Dursun
    Powiązania:
    https://bibliotekanauki.pl/articles/1192674.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Middle East water
    Climate change
    drought
    water shortage
    transboundary rivers
    Tigris and Euphrates
    Opis:
    Over the last decade, numerous studies have appeared in books and journals addressing the climate change impacts on water quantity and quality of the Euphrates and Tigris River Basins. When one focused to these studies it can be seen that several studies link the Syrian uprising and subsequent outbreak of civil war to the drought. it also seems that when the current civil war is over, the most important need will be implementation of a basin wide sustainable water management policy. Therefore this requires more cmprehensive studies on current situation and future threats of the basin. Some of the researches have stated in their recently published articles that, “a severe drought occurred by human-induced climate change and a mass migration of drought-affected farmers fled to Syria’s, then the influx of migrants exacerbated unemployment and inequality in the cities, contributing to civic unrest over a nonresponsive government”. Most researchers agree that climate change contributed to the drought in Syria and civil unrest crisis. Recent studies have also noted that there has been an natural declining trend in Tigris and Euphrates Streamflows That means that changes in flow are more closely related to natural diplomacy features than with human interventions in Tigris and Euphrates Basins. All this abovementioned results are alarming invitations to all riparian states in the Middle East to create a new hydro diplomacy.
    Źródło:
    World Scientific News; 2016, 47, 2; 279-297
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Afghanistan’s Transboundary Rivers and Regional Security
    Autorzy:
    Yıldız, Dursun
    Powiązania:
    https://bibliotekanauki.pl/articles/1193968.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Afghanistan’s Transboundary Rivers
    Central Asian Hydropolitics
    Central Asia’s Water
    Hydro Politics of Afghanistan
    Regional Water Security
    Opis:
    Aside from the issues peace and stability, one of Afghanistan’s most vital needs is safe and reliable supplies of water. But Afghanistan faces certain economic, political, institutional problems to develop water resources potential. These problems will increase as the years go by. Afghanistan is one of the world’s poorest countries, with an economy largely based on subsistence agriculture. Afghan farmers depend on reliable, year-round sources of surface water and groundwater. Seasonal flows of streams and rivers fed by melting snowpack high in Afghanistan’s mountains recharge alluvial aquifers located in populated valleys and provide city dwellers with drinking water. The current population of Afghanistan is about 31 million and it is projected to increase by nearly 80 percent by the year 2050 to approximately 56 million. This will raise demand on the country’s already economic stressed water resources. Almost all of the river basins are transboundary in the country. The Country due to the political unrest has not participated in many of the agreements regulating water resources in Central Asia. its current “non-player” and "outsider" status of the Central Asian Hydropolitics has to be changed when starting water resources development. This could create an international dispute in future regional water sharing discussions. In addition, recent research suggests that global climate change could alter precipitation patterns in Afghanistan. In particular, both the amount and the timing of snowfall received at higher elevations could change, impacting the major source of water for many areas in Afghanistan. Development of Afghanistan’s most transboundary water resources is a vital need for its own national interest, but it is also directly related with a transboundary water management dispute issue in the region. In other words, Afghanistan should find the best way to develop its transboundary water resources for national development as well as peace and stability of the region. But this development won't be so easy if current amount of water use of riparian states will be same when Afghanistan plans to release smaller amount of water.
    Źródło:
    World Scientific News; 2015, 16; 40-52
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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