Temat: groundwater - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Groundwater mapping of urban and coastal areas in Brunei
Autorzy:: Abidin, Hakimmi
Azffri, Siti Lieyana
Nirus, Emelia
Suhip, Asri
Jaya, Afiq Aiman
Gödeke, Stefan Herwig
Tematy:: Brunei
groundwater contour map
groundwater depth
groundwater flow path
submarine groundwater discharge
SGD; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/58906929.pdf Link otwiera się w nowym oknie
Opis:: Groundwater mapping plays an important role in effective water resource management, sustainable development, and environmental protection. In the tropical Brunei Darussalam (north Borneo Island), groundwater mapping is yet to be provided. The aim of the study is to provide groundwater mapping of Brunei, particularly for the urban and coastal areas of the Brunei-Muara capital district. The study uses a GIS interpolation technique to generate a groundwater contour map based on groundwater data from 572 sacrificial boreholes located in the study area. Remote sensing data and published maps from secondary sources were digitised in ArcGIS software to produce thematic layers for further hydrological evaluations. Results showed that groundwater levels in the study area are generally high and shallow, ranging from 0 to 18 m below ground level with a mean value of 2.9 m. According to the evaluation of geo-thematic layers and groundwater contours, groundwater flows towards the South China Sea in the coastal areas and towards the Brunei River further inland. Hydraulic gradients towards the South China Sea also vary between 0.004 and 0.08. Thus, assuming surface aquifer thickness in the weathered zone between 10 to 20 m, hydraulic conductivities ranges from 1∙10-5 to 1∙10-4 m∙s-1, a submarine groundwater discharge (SGD) flux between 4.7∙10-7 to 4.0∙10-4 m3 ∙s-1 per unit width can be estimated for the shallow aquifer. This study provides valuable insights into the groundwater system dynamics so important, which are critical for its future utilisation and protection, aiming to contribute to the national water security in Brunei Darussalam.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Evaluation of the groundwater levels and salinity in irrigable areas using geographical information system (GIS)
Autorzy:: Ayaz, Müslüm
Sesveren, Sertan
Tematy:: groundwater monitoring
mapping
groundwater depth
groundwater salinity
irrigation
GIS; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Powiązania:: https://bibliotekanauki.pl/articles/101458.pdf Link otwiera się w nowym oknie
Opis:: Efforts on the management of water resources, especially irrigation and drainage, in arid-semiarid areas are extremely important for the sustainability of irrigated agriculture. Groundwater level should be constantly monitored and kept at the desired level in the project which is achieve the expected benefits from investments made for this goal. The research was done in right bank irrigation area which is located in Southeast Turkey, Suruc Plain in 2017. The spatial and temporal fluctuations of the groundwater table depth and groundwater salinity were measured in the course of five-month-periods; from July to October. The results of depth (m) and salinity (µmhos cm-1) of the groundwater observation wells were mapped using geographical information system (GIS). The results showed that groundwater was not found in many observation wells, while groundwater depth reached to a critical threshold level (2 m (risk free for drainage) from July to October in the study area. The groundwater salinity was found to be less than 2250 µmhos cm-1 at the research area. Depending on the research findings, it was noted that there were not any waterlogging, drainage and salinity problems stemming from the rise of groundwater table due to short-term irrigated agriculture in the plain.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Groundwater flow conditions in the coastal bedrock area of the Gulf of Finland
Autorzy:: Mälkki, E.
Tematy:: groundwater
bedrock
groundwater discharge
Baltic Sea; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2058880.pdf Link otwiera się w nowym oknie
Opis:: The coastal area and archipelago of the Gulf of Finland mostly comprises bedrock terrain with a generally thin soil cover and represents a distinct hydrogeological regime. The bulk of the bedrock area consists of relatively unbroken blocks with small, hydraulically uniform systems. The direct groundwater flow from the blocks to the sea is restricted to the blocks bordering the sea. The blocks are crossed by faults and fractures, which locally form long broken zones inside the rock mass. A single fault can catch water from several blocks and also from the soil cover. Most groundwater in the coastal strip flows to the sea through the bedrock fault zones, which are thought to represent the most favourable flow conditions. The dimensions of hydraulically uniform horizons, hydraulic conductivities and hydraulic gradients of the fault zones are poorly known. The estimated groundwater flow distance from the land to the sea in the faults reaches 8–10 km, thought the average distance may only be around 2 km. In the block areas the flow distance is even shorter, down to about one kilometre. On the whole, the amount of groundwater discharging directly to the sea from this regime (excluding overlying sand and gravel deposits), which has a surface area of around 2100 km2, is approximately 4 m3 s–1. This is a third of the total direct discharge to the sea in the coastal areas of Finland.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Modeling of Groundwater Pollution by Former Seawater in Submarine Groundwater Discharge Driven by Saltwater Intrusion
Autorzy:: Al-Taliby, Wissam
Dekhn, Hadeel
Tematy:: saltwater intrusion
SEAWAT
submarine groundwater discharge
groundwater; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/2026744.pdf Link otwiera się w nowym oknie
Opis:: Coastal aquifers are usually vulnerable to contamination by saltwater intrusion. The degree of contamination depends on the amount of former seawater intruding the aquifer as submarine groundwater discharge (SGD). A three-dimensional numerical SEAWAT model was developed to provide insights to the responses of saltwater intrusion and amount of seawater portion of SGD, to groundwater withdrawal from four wells at different spatial locations. The results showed that saltwater wedge encroachment varies with a withdrawal rate and well location. Increasing withdrawal rates from 0.165 $m^3$/s to 0.53166 $m^3$/s resulted in a noticeable increase in wedge encroachment into the aquifer from 589 m to 1319 m, respectively, regardless of the distance from the coastline. However, higher withdrawals from the wells closer to the coastline caused the hydraulic head near the seaside to drop below the terrestrial head, causing the saltwater wedge to be pushed back toward the sea. Simulations also showed that a coastal well might act as a hydraulic barrier that prevents the brackish zone from moving further inland, which is critically important in terms of groundwater management. Seawater contributed from 5% to above 33% in SGD. Although the withdrawal rates from Well 3 were 10 to 20 times larger than the Well 2 rates, the seawater contribution associated with Well 3 was about the same. This is attributed to the horizontal vicinity of Well 2 to the seacoast boundary compared to Well 3 even though Well 3 is deeper than Well 2, demonstrating that it is the horizontal location that governs the amount of abstracted former seawater.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Numerical simulation of the quaternary aquifer groundwater flow of the northern Vistula Delta Plain
Autorzy:: Szpakowski, W.
Tematy:: groundwater flow
numerical calculations
Modflow code
groundwater resources; Pokaż więcej
Wydawca:: Politechnika Gdańska
Powiązania:: https://bibliotekanauki.pl/articles/1933155.pdf Link otwiera się w nowym oknie
Opis:: Results of Quaternary aquifer flow calculations are presented for the Vistula Delta Plain and the southern Kashubian Lakeland edge zone. The Quaternary level is one of the most important water supply resources for the city of Gdansk. The numerical simulations of groundwater flow were performed using the Modflow and Modpath codes and the Groundwater Modeling System (GMS 3.1) package. Calculations representing the state prior to the launch of the Lipce intake were performed under steady state conditions. The model was calibrated, which enabled simulation of groundwater flow under transient conditions. Calculation for the years 1969-1985 have shown the evolution of a Quaternary aquifer depression cone. The inflow from river Dead Vistula to the Quaternary aquifer is recognized through particle path solution for a selected water particle. The numerical solution has confirmed the observed increase of Cl- ions in the Grodza Kamienna intake after 1969.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Map of Preliminary Valorisation of the Major Groundwater Basins as cartographic representation of documentation of groundwater reservoirs, with establishing direction for further work and research
Autorzy:: Skrzypczyk, L.
Tematy:: groundwater reservoirs
pollution resistance
Major Groundwater Basins
valorization; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2065892.pdf Link otwiera się w nowym oknie
Opis:: Preliminary valorisaion of the Major Groudwater Basins, including the assesment of groundwater useful properties, as well as necessity and order of protective measures (Paczyński, 2003) is a research project undertaken by Polish Geological Institute at the request of the Minister of Environment. The PGI performed an assessment of the MGBs taking into account a wide range of aspects and with use of various documentations, results of studies, publications, archival and cartographic data. The two years hydrogeological research was cartographically summarized in the Map of Preliminary Valorisation of the Major Groundwater Basins in 1 : 500,000 scale, which is another step in documenting the Major Groundwater Basins. The valorisation revealed that most of the documented MGBs urgently require establishing protective zones and that there is an pressing necessity of implementing and designating “Strategic Groundwater Basins”.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Modelowanie wód podziemnych dla ustalenia zasobów eksploatacyjnych ujęć na przykładzie Trójmiasta
Groundwater flow modelling for evaluating the admissible volume of extracted groundwater - Tricity region case study
Autorzy:: Jaworska-Szulc, B.
Tematy:: wody podziemne
zasoby eksploatacyjne
ujęcia wód podziemnych
groundwater
admissible volume of extracted groundwater
groundwater intakes; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2063271.pdf Link otwiera się w nowym oknie
Opis:: Aglomeracja Trójmiejska obejmuje zróżnicowany geomorfologicznie obszar. Wody podziemne ujmowane są na obszarze wysoczyzny, w strefie zasilania i przepływu wód podziemnych, a także na obszarze nizin nadmorskich, w strefie ich drenażu. W artykule przestawiono wyniki badań modelowych prowadzonych w celu ustalenia zasobów eksploatacyjnych wód z utworów plejstocenu na dwóch ujęciach zlokalizowanych w części wysoczyznowej: Gdynia Wiczlino oraz Gdynia Wielki Kack. Obliczenia przeprowadzono niezależnie dla obu ujęć, uwzględniając pracę innych dużych ujęć wód podziemnych znajdujących się na obszarze badań (Gdynia Sieradzka oraz Gdańsk Osowa). Symulacje modelowe wykazały, że istnieje ich silne współdziałanie. Zaznacza się ono szczególnie w warunkach jednoczesnego poboru wód na wszystkich ujęciach w ilości ich maksymalnych zatwierdzonych zasobów. Eksploatacja prowadzi wówczas do powstania głębokiego na 15 m, regionalnego leja depresji, przy czym w obu skonstruowanych niezależnie modelach uzyskano niemal identyczny wynik. Tak intensywny pobór wód podziemnych jest niekorzystny ze względu na zmianę reżimu przepływu wody w ciekach powierzchniowych. W wyniku eksploatacji zwiększa się infiltracja rzek, a zmniejsza się ich drenaż, lokalnie zanika górna warstwa wodonośna, a cieki płynące na tym terenie mogą okresowo wysychać. W efekcie obliczeń optymalizacyjnych ustalono, że maksymalny pobór wód nie powinien przekraczać na ujęciu Wiczlino 650 m(3)h, a na ujęciu Wielki Kack 410 m(3)/h.
Hydrogeological conditions of the Tricity region are diversified. Its western part, the Kaszubian Lake Upland, is the recharge area, whereas its eastern part, marine lowlands, is the drainage area. There are four large groundwater intakes located in the upland area. The admissible volume of extracted groundwater has been estimated for two of the intakes. For this purpose mathematical models of groundwater flow were developed, and the interactions between groundwater intakes were verified. The model simulations showed an influence of groundwater exploitation on the groundwater, especially with the amount of maximum admissible resources. The exploitation caused the formation of a 15 m deep regional depression cone. Almost the same result was received in both the independently constructed models. Such an intense groundwater abstraction also changes the regime of surface water flows. An infiltration of rivers is increasing and drainage is smaller, locally an upper water-bearing layer dries out and the streams in this area can periodically dry. As an effect of calculations, it was evaluated that the maximum level of exploitation for the Wiczlino intake is 650 m(3)/h, and for the Wielki Kack intake - 410 m(3)/h.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Organizacja monitoringu badawczego i jego znaczenie dla oceny stanu jednolitych części wód podziemnych i programów służących osiągnięciu celów środowiskowych
Organizing the groundwater monitoring and its significance for the assessment of groundwater body conditions and projects performed to achieve environmental objectives
Autorzy:: Prażak, J.
Woźnicka, M.
Tematy:: wody podziemne
monitoring
części wody podziemnej
groundwater
groundwater bodies; Pokaż więcej
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/2075426.pdf Link otwiera się w nowym oknie
Opis:: Groundwater research monitoring, organized and carried out by the Polish Hydrogeological Survey since 2009, has been aimed at providing details on the quantitative and chemical conditions of groundwater bodies (GB) in areas of large-scale impact of mining activities and urban-industrial agglomerations. It is intended to provide information on the analysis of pressions and actual impacts on groundwater to assess the condition of groundwater bodies and to develop action programmes to achieve environmental objectives. Currently, it already operates in eight areas of mining impact, and, in the nearest future, it will cover the Basznia sulphur mining area as well as seven urban-industrial agglomerations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Assessment of characteristics, water quality and groundwater vulnerability in Pakis District, East Java Province, Indonesia
Autorzy:: Rubiantoro, Prasetyo
Bisri, Mohammad
Afandhi, Aminudin
Tematy:: geoelectrics
groundwater
intrinsic vulnerability
pollution
groundwater quality
specific vulnerability; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/2073736.pdf Link otwiera się w nowym oknie
Opis:: Groundwater is a very important natural resource to support the activities of the residents of Pakis District, Malang Regency. On the other hand, increased activity puts pressure on groundwater quality. Agricultural intensification, urbanisation, and industrialisation can be sources of pollutants. Hydrological factors, topography, lithology, and surrounding rainfall are triggers for contamination of groundwater. The main objective of this research is to determine the characteristics, quality of groundwater, and its susceptibility to pollution. To complete this research, geoelectric measurements were carried out at 43 points spread throughout the study area and sampling of 18 shallow wells in agricultural, residential, and industrial areas for chemical analysis. All data obtained were analysed to create a map of the spatial distribution of groundwater vulnerability. The results show that the groundwater in the study location is in the transition zone and flows through the volcanic rock layers. The level of groundwater pollution is in the uncontaminated status to heavily polluted with pollutants in the form of heavy metal manganese and Escherichia coli bacteria. The spatial distribution of groundwater intrinsic vulnerability shows low, moderate, and high levels of vulnerability, respectively 32.99%, 60.87%, and 6.14% of the research area. Groundwater specific vulnerability associated with land use factors shows that 26.25% are negligible, 42.46% are low, and 31.29% are moderate. From this it can be concluded that the study area has been polluted both geogenically and anthropogenically, therefore, special actions must be taken to restore the quality of groundwater.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Variability of basic geothermal water parameters in Chochołów PIG-1 borehole in the western part of the Podhale Basin
Autorzy:: Operacz, A.
Tematy:: geothermal waters
groundwater temperature
common groundwater ions
Podhale Basin; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Powiązania:: https://bibliotekanauki.pl/articles/101021.pdf Link otwiera się w nowym oknie
Opis:: Geothermal waters under national conditions have the status of minerals, which means that their exploitation is carried out in accordance with the provisions of Geological and Mining Law. In the area of the Podhale Basin, one of the boreholes that extracts water of elevated temperature is the Chochołów PIG-1 borehole which constitutes the basis for the functioning of the Chochołowskie Termy recreation complex. The main feature of the waters intake due to the correct functioning of the complex is the stability of temperature and physicochemical parameters. The variability of most important hydrogeological parameters (temperature, SEC, SO42-, Cl-, HCO3-, Ca2+, Mg2+, Na+) with available data base were chosen for the analyzes. These parameters determine economic viability and proper conditions for the technical exploitation of geothermal borehole Chochołów PIG-1. Water chemistry has been studied in the area of ionic index markings determining the type of exploitating geothermal water. This paper presents the results of analyzes of selected parameters in the years 2016-2017 and indicates trends in their contents in the given period. The general conclusion is that under operating conditions in accordance with the approved performance, physicochemical parameters are characterized by relative stability. The appropriate exploitation of water from the Chochołów PIG-1 borehole allows for maintaining the proper temperature, which is the underpinning for the functioning of the recreation and balneology complex of the Chochołowskie Termy.
Dostawca treści:: Biblioteka Nauki

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