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    Wyświetlanie 1-3 z 3
    Tytuł:
    Assessment process in the delimitation of historic urban landscape of Algiers by AHP
    Autorzy:
    Oumelkheir, Boukratem
    Nadia, Djelal
    Powiązania:
    https://bibliotekanauki.pl/articles/1068986.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    Historic urban landscape
    landscape assessment
    decision process
    criteria SIG
    landscape delimitation
    Opis:
    This research paper covers the way in which landscape delimitation is carried out in a historic urban area context. Landscape delimitation, in this case, explores the relationship between landscape considerations in the urban and heritage planning system in Algeria. The characterisation of the historic urban landscape is challenged by various types of values. The landscape assessment of the central urban historic area of Algiers was focused on its beauty configuration using the AHP multi-criteria method, supported by values obtained through GIS. Various delimitation alternatives of the historical urban landscape are assessed. Distinctive landscapes emerge, moving away from the original historic urban landscape, which is strictly related to the context of the casbah. Spatial landscape delimitation is the means by which the connecting values of the landscape and their interconnections are managed by monitoring problems of fragmentation and ensuring their interaction at the different boundaries. Urban planning must necessarily incorporate landscapes boundaries into the decision-making processes for the conservation of value connections and managing its beauty configuration.
    Źródło:
    Miscellanea Geographica. Regional Studies on Development; 2021, 25, 2; 110-126
    0867-6046
    2084-6118
    Pojawia się w:
    Miscellanea Geographica. Regional Studies on Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contribution of a Geographic Information System to Assess the Vulnerability to Groundwater Pollution of the Free Water Table from the Oued Souf Region (South-East Algeria)
    Autorzy:
    Khelfaoui, Faycal
    Sayad, Lamine
    Attoui, Badra
    Bouselsal, Bouualem
    Ghezaili, Salah
    Powiązania:
    https://bibliotekanauki.pl/articles/2051691.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    free aquifer
    Oued Souf
    chemical fertilizer
    vulnerability
    DRASTIC
    GOD
    susceptibility index
    pollution
    SIG
    warstwa wodonośna
    Oued Suf
    nawozy chemiczne
    zanieczyszczenia
    Opis:
    The Oued Souf free aquifer located in the South East of Algeria represents the main water resource used mostly for urban and agricultural activities. The intensive use of chemical fertilizers has led to serious environmental problems such as contamination of the free aquifer in the region. Thus, aquifer vulnerability has been assessed using several different methods (DRASTIC, GOD, and the Susceptibility Index ‘SI’) based on a geographic information system (GIS). For each method, two vulnerability maps have been developed in the years 2002 and 2012. These maps show that the study area is more exposed to urban, and especially agricultural, pollution. Two classes of vulnerability (moderate and high) have been identified by both DRASTIC and GOD methods. A combined analysis reveals that the moderate class showing 48% (for the GOD method), and the high class showing 57% (for the DRASTIC method) are the most dominant. However, the Susceptibility Index method (SI) revealed that the vulnerability varies from moderate to very high-level classes. In 2012, about of 53% of the study area was dominated by moderate vulnerability classes. The high vulnerability class also includes a considerable part of the land (41%) around urban or strongly agricultural areas, while only 6% is under very high vulnerability groundwater contamination. In addition, a marked decrease in the vulnerability level was noticed in 2012 compared to 2002. This decrease is mainly due to the lowering of the water table after the installation of a vertical drainage network to evacuate the surplus water to the depression and Chotts areas in the North of the region. These results provide a guide for decision-makers involved in the protection of groundwater pollution in such a vulnerable area.
    Źródło:
    Civil and Environmental Engineering Reports; 2021, 31, 3; 1-17
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reaction crystallization of struvite in a continuous DTM type crystallizer with a compressed air driven jet pump
    Autorzy:
    Matynia, A.
    Mazieńczuk, A.
    Piotrowski, K.
    Wierzbowska, B.
    Hutnik, N.
    Kozik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/779281.pdf
    Data publikacji:
    2011
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    krystalizator DTM
    strumienica
    sprężone powietrze
    krystalizacja
    usuwanie fosforanów
    struwit
    rozkład miarowy kryształów
    model kinetyczny
    continuous DTM crystallizer
    jet pump
    compressed air
    reaction crystallization
    phosphates(V) removal
    struvite
    crystal size distribution
    SIG kinetic model
    Opis:
    Experimental tests covering the production of struvite MgNH4PO4ź6H2O from water solutions containing 1.0 mass % of phosphate(V) ions using magnesium and ammonium ions in stoichiometric proportions were carried out in a crystallizer of 1.2 dm3 working volume. The process temperature was 298 K. Struvite crystals of mean size Lm from ca. 14 to ca. 38 µm were produced depending on the process environment's pH (9-11) and the mean residence time of suspension in a crystallizer, τ (900-3600 s). In such defined process conditions the linear growth rate of struvite crystals changed from 1.45ź10-8 m/s (pH 9, τ 900 s) to 2.06ź10-9 m/s (pH 11, τ 3600 s) while the nucleation rate from 5.1ź10^7 to 3.2ź10^9 1/(sm3). Crystal product of the most advantageous granular characteristics was produced at pH 9 and the mean residence time 3600 s. Within this product population the largest sizes reached above 200 µm while the number of crystals smaller than 3 mm was kept below 6%.
    Źródło:
    Polish Journal of Chemical Technology; 2011, 13, 2; 46-53
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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