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    Wyświetlanie 1-9 z 9
    Tytuł:
    Determination of Groundwater Vulnerability Using the DRASTIC Method in Ouargla Shallow Aquifer (Algerian Sahara)
    Autorzy:
    Satouh, Adel
    Boualem, Bouselsal
    Chellat, Smaine
    Benaabidate, Lahcen
    Powiązania:
    https://bibliotekanauki.pl/articles/1838286.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    Ouargla
    shallow aquifer
    vulnerability
    DRASTIC
    land-use
    Opis:
    Groundwater is the main source for many uses around the city of Ouargla. In this study, the DRASTIC method was used to assess the vulnerability of the groundwater aquifer. Seven hydrogeological parameters of the model (D water depth, R efficient charging, A aquifer type, S soil type, T topography, I unsaturated zone and C hydraulic conductivity) were measured and mapped. The intrinsic vulnerability map of the shallow aquifer, using the DRASTIC method, shows a high to very high vulnerability to pollution; 91.6% of the study area has high vulnerability, 8.4% of it has very high vulnerability. The comparison of the DRASTIC maps with the land use map illustrates that the agglomerations and irrigated areas are the most vulnerable areas to pollution, due to the low depth of the aquifer and the infiltration of significant domestic and irrigation wastewater. The results show that the relationship coefficient between the DRASTIC index and nitrate concentration is R = 0.73. This indicates that the groundwater vulnerability mapping by using the DRASTIC method can be applied for sensible groundwater resources management and land-use planning in the study area.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 6; 12-19
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Groundwater Vulnerability Using the DRASTIC Method in Ouargla Shallow Aquifer (Algerian Sahara)
    Autorzy:
    Satouh, Adel
    Boualem, Bouselsal
    Chellat, Smaine
    Benaabidate, Lahcen
    Powiązania:
    https://bibliotekanauki.pl/articles/1838393.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    Ouargla
    shallow aquifer
    vulnerability
    DRASTIC
    land-use
    Opis:
    Groundwater is the main source for many uses around the city of Ouargla. In this study, the DRASTIC method was used to assess the vulnerability of the groundwater aquifer. Seven hydrogeological parameters of the model (D water depth, R efficient charging, A aquifer type, S soil type, T topography, I unsaturated zone and C hydraulic conductivity) were measured and mapped. The intrinsic vulnerability map of the shallow aquifer, using the DRASTIC method, shows a high to very high vulnerability to pollution; 91.6% of the study area has high vulnerability, 8.4% of it has very high vulnerability. The comparison of the DRASTIC maps with the land use map illustrates that the agglomerations and irrigated areas are the most vulnerable areas to pollution, due to the low depth of the aquifer and the infiltration of significant domestic and irrigation wastewater. The results show that the relationship coefficient between the DRASTIC index and nitrate concentration is R = 0.73. This indicates that the groundwater vulnerability mapping by using the DRASTIC method can be applied for sensible groundwater resources management and land-use planning in the study area.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 6; 12-19
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Pollution Risk Mapping Methods in an Eastern Mediterranean Catchment
    Autorzy:
    Michalopoulos, D.
    Dimitriou, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/124225.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    vulnerability mapping
    pollution risk mapping
    groundwater pollution
    COP
    DRASTIC
    Opis:
    The protection and preservation of good groundwater quality is of critical importance worldwide, nowadays. Increasing urbanization, economic development and agricultural activities, combined with limited precipitation contribute to the quantitative and qualitative degradation of groundwater resources, especially in the eastern Mediterranean region. For this purpose, a series of actions are implemented including groundwater vulnerability mapping that can depict prone to pollution aquifers which need protection and/or restoration measures. In this study, the efficiency of two well-known methodologies (COP and DRASTIC) for groundwater vulnerability and pollution risk mapping was assessed in the Sperchios river basin. The vulnerability and pollution risk maps of the two methodologies were spatially compared to each other and the observed similarities and differences were discussed and explained. The output of the study shows that in the particular geoenvironmental conditions DRASTIC method performs better than the COP, particularly in the lowland, porous media aquifer.
    Źródło:
    Journal of Ecological Engineering; 2018, 19, 1; 55-68
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High-resolution mapping to assess risk of groundwater pollution by nitrates from agricultural activities in Wielkopolska Province, Poland
    Wysokorozdzielcza ocena ryzyka zanieczyszczenia wód podziemnych azotanami pochodzącymi z działalności rolniczej na obszarze Wielkopolski
    Autorzy:
    Zabłocki, Sebastian
    Murat-Błażejewska, Sadżide
    Trzeciak, Joanna Alicja
    Błażejewski, Ryszard
    Powiązania:
    https://bibliotekanauki.pl/articles/2173789.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    shallow groundwater
    nitrates
    DRASTIC based methods
    Wielkopolska (Greater Poland)
    vulnerability/pollution risk
    płytkie wody gruntowe
    azotany
    metody DRASTIC
    Wielkopolska
    podatność/ryzyko zanieczyszczenia
    Opis:
    The purpose of this research was to determine the groundwater intrinsic vulnerability to pollution of shallow groundwater in Wielkopolska Province, Poland and to assess the risk of pollution by nitrates. Wielkopolska is known as an area where the problem of water pollution by nitrates has existed for a long time due to intensive agriculture. DRASTIC method and its optimized version as well as four other risk evaluation methods were selected to assess the risk pollution with nitrates. The results of either method did not correlate with nitrate concentrations recorded in the total of 1679 groundwater monitoring points. Therefore a new method of groundwater pollution risk assessment (NV-L) was proposed. The new method is based on optimized results of the DRASTIC system and the L parameter which considers not only land use types, but also the amount of nitrogen loading leached from soil as a result of fertilizer consumption, and from wet deposition. The final results of NV-L method showed that the largest part of the study area is covered by a very low class of pollution risk (30.6%). The high and very high classes occupy 11.6% of the area, mostly in the areas designated until 2012 as the Nitrate Vulnerable Zones. Validation of the results of all methods showed that the other methods than NV-L cannot be used as a basis for reliable assessment of the risk of groundwater pollution by nitrates, as they do not take into account the nitrogen load leached from the soil profile.
    Celem badań było określenie podatności wód podziemnych na zanieczyszczenie płytkich wód podziemnych w województwie wielkopolskim oraz ocena ryzyka zanieczyszczenia azotanami. Województwo wielkopolskie uważane jest za obszar, na którym od dawna znany jest problem zanieczyszczenia wód azotanami z powodu intensywnego rolnictwa. Do obliczenia indeksu podatności naturalnej wybrano metodę DRASTIC i jej zoptymalizowaną wersję, natomiast do oceny ryzyka zanieczyszczenia azotanami cztery metody będące modyfikacjami metody DRASTIC. Wynik żadnej z nich nie był skorelowany ze stężeniami azotanów odnotowanymi w 1679 punktach monitoringu wód podziemnych, dlatego zaproponowano nową metodę oceny zagrożenia wód podziemnych NV-L. Metoda opiera się na zoptymalizowanych wynikach systemu DRASTIC i parametrze L, który uwzględnia nie tylko typ użytkowania gruntów, ale także wielkość ładunku azotu, pochodzącego z wymywania z gleby nawozów mineralnych i organicznych oraz z mokrej depozycji w opadach. Wyniki metody NV-L wykazały, że największy obszar objęty jest bardzo niską klasą zagrożenia zanieczyszczeniami (30,6%). Klasa wysoka i bardzo wysoka zajmują 11,6% powierzchni, głównie na obszarach wyznaczanych do 2012 roku jako obszary szczególnie narażone na wymywanie azotu do wód powierzchniowych. Wyniki wskazują, że w procedurach zastosowanych metod oceny podatności brakowało pewnych ważnych informacji. Dlatego ich wyniki należy traktować jako szacunkowe i nie mogą one być wykorzystywane w dalszych analizach jako użyteczne narzędzie ochrony wód podziemnych. Uwzględnienie innych, nowych elementów do oceny podatności wód podziemnych lub ryzyka zanieczyszczenia, może okazać się kluczowym czynnikiem, jak miało to miejsce w przypadku metody NV-L i wykorzystania danych dotyczących ładunku azotu wymywanego z profilu glebowego.
    Źródło:
    Archives of Environmental Protection; 2022, 48, 1; 41--57
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of intrinsic vulnerability of an Upper Jurassic karst-fissured aquifer in the Jura Krakowska (southern Poland) to anthropogenic pollution using the DRASTIC method
    Autorzy:
    Różkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059477.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Silesian-Cracow Monocline
    karst-fissured waters
    vulnerability to pollution
    DRASTIC
    Opis:
    This paper demonstrates the evaluation of in trinsic vulnerability of karst-fissured waters in an Upper Jurassic aquifer by applying modified DRASTIC method. The area investigated is the Jura Krakowska (South Poland) - an area of upland merokarst (or relictkarst), where the Upper Jurassic aquifer is mainly unconfined. The method applied is a combination of a simulation model of the ground water aquifer (factors: netre charge, hydraulic conductivity, ground wa ter flow velocity in the aquifer) and a geographical in formation system - GIS model (depth of ground water table, lithology of vadosezone, thickness of Upper Jurassic aquifer), and additionally a soil factor was taken into account. In the area of the Jura Krakowska, 5 classes of intrinsic vulnerability to pollution were distinguished according to the values of vulnerability factors. These classes range from extremely high to low vulnerability (IP 200-50). Based on the synthetic map of vulnerability it emerges that high vulnerability indices cover 54% of the area studied while medium and low vulnerability indices cover 46% of this area. The modified DRASTIC method presented seems to be a useful tool to evaluate the intrinsic vulnerability of karst-fis sured aquifers of "Torcal" type with a scattered system of recharge and discharge, and a thick vadosezone of variable permeability. This is consistent with the method developed with European programme COST ACTION 620. All rating methods recommended for karst have limitations, there fore the method applied is constantly updated. Many of them are particularly use ful for areas of bare karst, mountain systems of "Aliou" type and in ar eas of complete karst develop ment (holokarst).
    Źródło:
    Geological Quarterly; 2007, 51, 1; 17-26
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrogeochemical Characterization and Vulnerability Assessment of Shallow Groundwater in Basement Complex Area, Southwest Nigeria
    Autorzy:
    Adewumi, A. J.
    Anifowose, A. Y. B.
    Olabode, F. O.
    Laniyan, T. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/100830.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Śląski. Wydział Nauk o Ziemi
    Tematy:
    DRASTIC
    groundwater
    hydrogeochemical
    Owo
    vulnerability
    WQI
    wody podziemne
    zanieczyszczenie
    podatność
    hydrogeochemia
    Opis:
    Thirty-five (35) groundwater samples from Owo area were analyzed for physicochemical parameters. Results show that the mean value of pH is 6.32, TDS is 208.92 mg/l, temperature is 28.77oC, EC is 545.16 μs/cm; TH is 111.09 mg/l, SO4 is 71.73 mg/l, Cl is 0.07 mg/l, HCO3 is 14.09 mg/l, Na is 25.06 mg/l, Ca is 37.07 mg/l, K is 24.36 mg/l and Mg is 4.41 mg/l. The results were compared to the WHO and NDSQW standards. All parameters were within the permissible limit except EC in well OW6 and K is above the stipulated standards in 69% of the total samples. The high concentration of K is linked to the use of NPK fertilizer in the area for agricultural purposes. The groundwater belongs to Ca-Na-K-SO4 and Na-Ca-SO4 water type respectively. The ionic concentration in the groundwater is due to the dissolution of the rock that makes up the aquifer. Plagioclase and silicate-bearing rocks are the sources of major ions in the water. SAR, PI, RSBC and KR reveals that groundwater in the area is good for irrigation purpose. DRASTIC model further revealed that groundwater in the area is less vulnerable to contamination under the current environmental conditions.
    Źródło:
    Contemporary Trends in Geoscience; 2018, 7, 1; 72-103
    2299-8179
    Pojawia się w:
    Contemporary Trends in Geoscience
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Groundwater Pollution Vulnerability, Hazard and Risk in a Semi-Arid Region
    Autorzy:
    Haied, Nadjib
    Khadri, Samira
    Foufou, Atif
    Azlaoui, Mohamed
    Chaab, Salah
    Bougherira, Nabil
    Powiązania:
    https://bibliotekanauki.pl/articles/2027767.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    Mio-plio-quaternary aquifer
    Djelfa syncline
    DRASTIC
    WQI
    GIS
    pollution risk
    Opis:
    The Mio-plio-quaternary aquifer of the Djelfa Syncline is part of a region in Algeria which is characterized by the lack of surface water resources and located in a semi-arid climate. Since alluvial aquifers, and among them our aquifer, are the most vulnerable because of thier direct exposure to the pollution caused by the infiltrated pollutants, this work focused on the assessement of groundwater pollution vulnerability, hazard and risk. Thus, several methods were used; for this purpose, such as the DRASTIC and WQI methods mapped using a GIS. The results obtained clearly show a low to moderate vulnerability. The DRASTIC model and its validation based on the correlation with WQI revealed a low correlation ($WQ_I$vs $D_I$ : 0.221). Since the vulnerability model does not match with the groundwater quality, pollution risk was assessed by combining vulnerabilty and hazard (i.e, water quality). The risk map illustrated three levels ranging from low to high risk. This map should be helpful in decision making and groundwater management through avoiding high risk areas.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 10; 1-13
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of groundwater vulnerability using the DRASTIC model: A case study of Quaternary catchment A21C, Limpopo River Basin, South Africa
    Autorzy:
    Moges, Simeneh S.
    Dinka, Megersa O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844324.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    A21C Quaternary catchment
    DRASTIC model
    groundwater vulnerability
    sensitivity analysis
    South Africa
    Opis:
    Groundwater is a vital resource for domestic, agricultural, industrial activities and ecosystem services. Despite its multiple purposes, the resource is under significant threat owing to increasing contamination from anthropogenic activities and climate change. Hence, in order to ensure the reliability and sustainable use of groundwater for the present and future generations, effective management of groundwater (quality and quantity) is highly important. This can be achieved by identifying areas more vulnerable to contamination and implementing protective measures. The present study aims at assessing the vulnerability of groundwater using GIS-based DRASTIC index in the Quaternary catchment (A21C) within Limpopo River Basin. The vulnerability index varied from 87 to 207. About 53.6% (408 km2) of the catchment area also exhibited high risk of groundwater contamination mostly in central, north-eastern and western part of the sub-catchment. The medium and low vulnerability classes cover only 18.1% (137.5 km2) and 21.7% (165.1 km2) of the study area, respectively. The shallow groundwater at the Doornfontein Campus belongs to very high vulnerability area. The sensitivity analysis indicates that depth to water level, recharge, aquifer media, soil and topography are the important contributors to vulnerability assessment. The correlation analysis performed to validate the final vulnerability map shows a moderate positive correlation, indicating the model’s applicability to the urbanised environment. The study indicates an area that is highly vulnerable to pollution, and hence protective measures are necessary for sustainable management of the groundwater resource in the study area. The result of this study can also be further improved and verified by using other vulnerability assessment models.
    Źródło:
    Journal of Water and Land Development; 2021, 49; 35-46
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land 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
      Wyświetlanie 1-9 z 9

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