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    Wyświetlanie 1-4 z 4
    Tytuł:
    Investigation of groundwater potential zone using Geospatial Technology in Bahir Dar Zuria District, Amhara, Ethiopia
    Autorzy:
    Yihunie, Dawit
    Halefom, Afera
    Powiązania:
    https://bibliotekanauki.pl/articles/1031666.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Ethiopia
    GIS
    Groundwater potential
    geology
    geospatial technology
    Opis:
    Geospatial technology has been done to identify spatially the extents of highly suitable and moderately suitable areas for groundwater demarcation. Several input parameters (land use, soil type, slope, geology, geomorphology, and lineament) used to maps Groundwater potential assessment. Each thematic map has been reclassified into five classes. Suitable weightages have been given to each class with respect to its groundwater potential influences. Area of all raster formats of all parameters were calculated by GIS environment. All the weighted input parameters have been overlaid using “Weighted Overlay Analysis” tool in ArcGIS 10.3 platform. The results showed that 8.26 Km2, 441.74 Km2, 812.86 Km2, 198.01 Km2 and 80.57 Km2 of the study area fall in “Highly suitable, High, suitable, Medium suitable, Low suitable and Very Low suitable” category of groundwater potential respectively.
    Źródło:
    World Scientific News; 2020, 146; 274-289
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mapping of Soil Erosion Hotspot Areas Using GIS Based-MCDA Techniques in South Gondar Zone, Amhara Region, Ethiopia
    Autorzy:
    Teshome, Asirat
    Halefom, Afera
    Powiązania:
    https://bibliotekanauki.pl/articles/1076729.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Amhara Region
    Causative factors
    GIS
    MCDA
    Pairwise comparison
    Raster calculator
    South Gondar zone
    Susceptibility mapping
    Opis:
    In the highlands of the country in which the study area found was affected by soil erosion and desertification. This problem on the environment includes loss of soil fertility, reduction of the depth of water body (lakes, ponds, reservoirs etc), high water turbidity, flood hazard problems etc. This study focus on mapping of soil erosion prone areas in South Gondar zone (area: 14604 sq km), which comprises of Blue Nile river basin and Tekeze river basins. This study leads where the most effective soil conservation strategies should focus in the area. Based on GIS with the integration of the Multi Criteria Decision Analysis (MCDA), an attempt was made to combine a set of factors (Land use, Soil, Slope, Topographic Wetness Index, Stream Power Index, Elevation, and Curvature) to have a fruitful decision to fulfil to the stated objective. Raster based pairwise comparison method considering seven soil erosion motivating parameters have been done in Arc GIS environments. MCDA is used to quantify the raster based qualitative spatial erosion hotspot area which produced through pairwise comparison. Raster based spatial model tells that out of total watershed area, 39.31 sq km (0.27%), 33.40 sq km (0.23%), 2358.12 sq km (16.15%), 11027.76 sq km (75.51%) and 1145.60 sq km (7.84%) areas are very high, High, Medium, Low and Very low prone to soil erosion respectively. This study will serve as insight to Basins/watershed decision maker and planners to alleviate soil erosion problems and its related hazards.
    Źródło:
    World News of Natural Sciences; 2019, 24; 218-238
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conceptual analysis of urban water management considering climate change scenarios
    Autorzy:
    Halefom, Afera
    Khare, Deepak
    Sisay, Ermias
    Teshome, Asirat
    Worku, Tesfa
    Tadesse, Dessalew
    Dananto, Mihret
    Powiązania:
    https://bibliotekanauki.pl/articles/1031681.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    climate change
    management
    modeling
    urban
    water
    Opis:
    Since the trends of adverse climate change and integrated urban water management have continued in the twenty-first century, governments and other institutions seek reliable predictions as water resource requirements arise. Although uncertainty is never cut off from the need for a probabilistic movement, through current developments in science and the technology of hydrological modeling on urban water management analysis, researchers can improve the ability to create realistic scenarios that will benefit the water sector it adapts to these changes. Model studies on the combined effects of climate change and the water sector have found that the change can be significant, depending on scenarios and the assumptions of climate change, as well as the degree of urban development. In this work, conceptual analysis of urban water management has been applied to several scenarios of climate change in order to obtain new insights and uncertainties.
    Źródło:
    World News of Natural Sciences; 2020, 28; 51-66
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Farmers’ perception of climate change and gender sensitive perspective for optimised irrigation in a compound surface-ground water system
    Autorzy:
    Dawit, Meseret
    Dinka, Megersa Olumana
    Halefom, Afera
    Powiązania:
    https://bibliotekanauki.pl/articles/2073745.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    agriculture
    climate change
    gender perspective
    water use
    Opis:
    Water is becoming a scarce resource due to the immense intensification of agricultural activity, climate change, and demographic pressure. Hence, information on water use/management and their associated management practices is essential for selecting, planning, implementing, and monitoring schemes that optimise water use to meet the increasing demand related to basic human needs and welfare. This study presents the farmers’ perception of climate change from a gender sensitive perspective to promote adaptation and optimise irrigation/agricultural productivity in a compound surface-ground water system within the Anger sub-basin (Ethiopia). The study results showed that climate change affects water demand and supply routes in which more than 65% of the decrease in lake water level is due to climate change and overuse of surface water. The research findings show that women’s recognition and apprehension of climate change is much greater than men’s. Thus, women’s role in farming is important for ensuring food security at the household level. Gender sensitivity and can play a role in preventing the change in climate through optimising irrigation efficiency and suggesting the need for further research on its application to science. The study demonstrates that women’s participation in agricultural tasks, crisis management, and informal institutions is more vigorous than men’s. On the other hand, the understanding and communication of farmers is based on experience and concerns about the climate impact. Moreover, studies showed that climate change has a potential impact on the access to water supply for agriculture, urbanisation, and the environment. Therefore, there is a need to assess the dynamics of surface-groundwater interaction as affected by climate change and gender inequality to optimise the irrigation system.
    Źródło:
    Journal of Water and Land Development; 2022, 52; 265--271
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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