Temat: water salinity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Identification of marine intrusion in the plain of Collo, northeastern Algeria
Identyfikacja intruzji morskiej na równinę Collo w północnowschodniej Algierii
Autorzy:: Saaidia, B.
Mahia, M.
Chaab, S.
Powiązania:: https://bibliotekanauki.pl/articles/292654.pdf
Data publikacji:: 2017
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: Algeria
coastal aquifer
Collo
marine intrusion
water salinity
Algieria
intruzja morska
przybrzeżny poziom wodonośny
zasolenie wody
Opis:: The population increase, urbanization and intensification of agriculture and demands for water supply in the coastal plain of Collo led to excessive pumping of the unconfined aquifer with limited dimensions. This study aimed to characterize the effect of the overexploitation of the groundwater from the only unconfined aquifer in the region, what resulted in the inversion of the groundwater flow and the rise the possible seawater pollution that is shown in the water table map. The causes and effects of the saltwater intrusion were discussed. The interpretation of the electrical conductivity measurements, chloride and sodium maps have shown clearly the areas where values were the highest with tighter curves towards the sea, the wadis Guebli and Cherka. These values distribution indicated a marine source of salinity in wells and boreholes close to the sea and wadis.
Rosnąca liczba ludności, urbanizacja i intensyfikacja rolnictwa spowodowały większe zapotrzebowanie na dostawy wody na przybrzeżnej równinie Collo i doprowadziły do nadmiernego pompowania wody z warstwy wodonośnej o swobodnym zwierciadle i ograniczonych rozmiarach. Celem badań było scharakteryzowanie skutków nadmiernej eksploatacji wód gruntowych z jedynego w regionie poziomu wodonośnego o swobodnym zwierciadle. Wynikiem eksploatacji była inwersja przepływu wód gruntowych i zwiększone prawdopodobieństwo ich zanieczyszczenia przez wodę morską, co przedstawiono na mapie poziomów wód. Przedyskutowano przyczyny i skutki intruzji wód słonych. Interpretacja pomiarów przewodności elektrycznej i mapy rozmieszczenia jonów chlorkowych i sodowych ujawniły obszary o wartościach tych parametrów rosnących w kierunku morza i uedów Guebli i Cherka. Rozmieszczenie wartości stężenia badanych składników wskazuje na morskie źródło zasolenia studni w pobliżu morza i obu rzek.
Źródło:: Journal of Water and Land Development; 2017, 35; 211-219
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Hydrochemical characteristics and water quality assessment of Lake Dayet Erroumi – Khemisset, Morocco
Autorzy:: El Qryefy, Mohamed
Ouardi, Jamila
Najy, Mohamed
Belghyti, Driss
El Kharrim, Khadija
Powiązania:: https://bibliotekanauki.pl/articles/1844350.pdf
Data publikacji:: 2021
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: Dayet Erroumi
hydrochemical characteristics
Morocco
salinity
water quality
Opis:: The objective of this paper is to study the hydrochemical characteristics of Lake Dayet Erroumi (Khemisset, Morocco). Three sampling campaigns were carried out in April, July and November 2019. The temperature, pH and electrical conductivity were measured in situ using Hanna Instruments HI 98280. Concentrations of calcium, magnesium, carbonate, bicarbonate and chloride were analysed by the volumetric method. The atomic absorption technique was used to determine sodium, potassium, nitrate and sulphate. The physico-chemical analysis of the water indicates that the pH is basic. The nitrate and sulphate concentrations show that the water is of good quality according to Moroccan surface water guidelines. Furthermore, the hydrochemical facies of water is of the sodium-chloride type according to the Piper diagram. The value of the electrical conductivity indicates that the lake water has high salinity. The high mineralization of water is explained by the leaching from evaporitic rocks in the region. The principal component analysis shows that the spatial and temporal variation in salinity constitutes the major phenomenon of the hydrochemical characteristics of this lake. Salinity varies inversely with the pH value. The salinity of the water is controlled by abiotic factors (rain and evaporation). However, other parameters (pH, nitrate, carbonate and bicarbonate) depend on biotic factors. Evaporation plays a crucial role in the seasonal variation of the water chemical composition. During wet seasons, the mineralization of water decreases due to dilution by rainwater and the water level of the lake rises (high water period). During dry seasons, lake water evaporates and consequently the mineralization of the water increases, which explains the increase in salinity during the low water period.
Źródło:: Journal of Water and Land Development; 2021, 49; 179-187
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Wheat yield response and seasonal salt profile evolution under irrigation with saline waters in a semi-arid region
Autorzy:: Cheraghi, Seyed A. M.
Powiązania:: https://bibliotekanauki.pl/articles/293346.pdf
Data publikacji:: 2020
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: saline water
soil salinity
wheat yield
rainfall
leaching fraction
Opis:: Scarcity of fresh water resources is the major constraint for agricultural development in Iran as in many other regions with arid and semi-arid climate. With the pressure on fresh water resources, the use of un-conventional water resources including brackish, saline and sewage water has received greater attentions in recent years. The objective of this study was to assess the impact of farmers' practices using saline groundwater on wheat yield and soil salinity in a Mediterranean climate of Fars province in southern Iran. The study was carried out in several commercial wheat production regions for two years. Chemical analysis of irrigation waters, volume of applied irrigation water, electrical conductivity of soil saturation extract (ECe) and yield were measured in each field. General information on agronomic practices was also collected using a questionnaire. Results demonstrate that waters with salinities higher than what has been classified as “suitable for irrigation” are being used for the production of wheat crop. Analysis of wheat yield response to saline irrigation water showed that for water salinities up to 10.7 mS∙cm^–1 (threshold value) variation in yield was relatively minor, above which wheat yield decreased at a greater rate. Root zone salinity profiles showed the effect of winter rainfall in reducing soil salinity. It is concluded that although acceptable yields are obtained with some of the highly brackish waters, over application of these waters would threaten the sustainability of crop production in the region.
Źródło:: Journal of Water and Land Development; 2020, 44; 26-32
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Investigation and calibration of thermal and salinity layering in surface water resources using Ce-Qual-W2 model
Autorzy:: Chen, Tzu-Chia
Yu, Shu-Yan
Wang, Chang-Ming
Xie, Sen
Barazandeh, Hanif
Powiązania:: https://bibliotekanauki.pl/articles/2048504.pdf
Data publikacji:: 2021
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: Ce-Qual-W2 model
salinity
surface water
thermal layering
water quality modelling
water resources
Opis:: In the discussion of water quality control, the first and most effective parameter that affects other variables and water quality parameters is the temperature situation and water temperature parameters that control many ecological and chemical processes in reservoirs. Additionally, one of the most important quality parameters studied in the quality of water resources of dams and reservoirs is the study of water quality in terms of salinity. The salinity of the reservoirs is primarily due to the rivers leading into them. The control of error in the reservoirs is always considered because the outlet water of the reservoirs, depending on the type of consumption, should always be standard in terms of salinity. Therefore, in this study, using the available statistics, the Ce-Qual-W2 two-dimensional model was used to simulate the heat and salinity layering of the Latyan Dam reservoir. The results showed that with warming and shifting from spring to late summer, the slope of temperature changes at depth increases and thermal layering intensifies, and a severe temperature difference occurs at depth. The results of sensitivity analysis also showed that by decreasing the wind shear coefficient (WSC), the reservoir water temperature increases, so that by increasing or decreasing the value of this coefficient by 0.4, the average water temperature by 0.56°C changes inversely, and the results also show that by increasing or decreasing the value of the shade coefficient by 0.85, the average water temperature changes by about 7.62°C, directly.
Źródło:: Journal of Water and Land Development; 2021, 51; 117-123
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The influence of fertilisation on the water-salt regime in the conditions of the Mugan-Salyan massif, Azerbaijan
Autorzy:: Mustafayev, Mustafa
Tukenova, Zulfiya
Alimzhanova, Mereke
Ashimuly, Kazhybek
Mustafayev, Farid
Powiązania:: https://bibliotekanauki.pl/articles/2174323.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: convective diffusion
forecast
ground water
irrigation norm
reclamation
salinity soils
Opis:: The article presents research data on the amount of salts in the irrigated soils of the Mughan-Salyan massif, their composition, water-salt regime, and their forecast. It was found that the soils on the territory of the massif were saline to varying degrees. In general, the area of non-saline soils in the massif is 125,650 ha, mildly - 272,070 ha, moderately - 210,560 ha, highly - 125,850 ha, very highly - 109,450 ha and saline soils - 27,520 ha. The absorbed bases in the soils of the massif were studied, and it was determined that they change depending on the amount of salts as follows: in mildly saline soils, Ca - 57.82-68.31%, Mg - 25.26-36.28%, Na - 5.49-6.43%; in moderately saline soils - 56.77-65.76%, 27.03-35.58%, 7.12-7.94%, respectively; in highly saline areas - 54.05–64.75%, 24.94-43.67% and 9.19-14.42%. As you can see, the soils are mildly and moderately saline. The soils in the surveyed areas are saline to varying degrees (i.e., the average value of salts in the 0-100 cm layer of the soil varies between 0.25 and 1.00%). The biological product used in these soils contains a wide range of macro and microelements, humic acids, fulvic acids, amino acids, vitamins and enzymes that do not contain BioEcoGum mineral fertilisers. This biological product was used for the first time and one of the main goals was to study the improvement of water-physical properties of soils after its use. Therefore, the water-salt regime of the soils of the study area was studied on three experimental sites selected for the area, the number of irrigations for different plants, and their norms were determined taking into account the depth of groundwater in the soils and shown in tabular form. They are widely used in farms and these regions, taking into account the proposed irrigation norms and their quantity.
Źródło:: Journal of Water and Land Development; 2022, 55; 276--285
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The impact of production of silver nanoparticles using soil fungi and its applications for reducing irrigation water salinity
Autorzy:: Yaseen, Rabaa
Kotp, Yousra H.
Eissa, Doaa
Powiązania:: https://bibliotekanauki.pl/articles/292300.pdf
Data publikacji:: 2020
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: antimicrobial activity
dehydrogenase
mycoynthesized nano-silver
nitrate reductase
reverse osmosis
soil salinity
water desalination
Opis:: In the present work, the dried biomass of soil isolated fungus Eurotium cristatum was used for synthesizing silver nanoparticles (AgNPs). The synthesized AgNPs were spherical in shape with average diameter of 16.56 nm and displayed maximum absorbance at 418. Fourier transform infrared (FTIR) study indicated the presence and binding of proteins with myco-produced silver nanoparticles. The optimum conditions for AgNPs biosynthesis were found to be at temperature of 40°C, pH of 8.0, substrate concentration of 500 ppm and fungal biomass wt. of 0.8 g. The AgNPs showed antibacterial activity against Staphylococcus aureus, Listeria monocytogenes, Escherichia coli and Shigella flexneri. AgNPs was built-in thin film nanocomposite (TFNC) membrane and the impacts of nanomaterial composition on membrane properties and desalination process were studied. The AgNPs produced membrane TFNC had better filtration performances than pure thin film composite membrane TFC. The TFNC membrane had enhanced water flux (32.0 vs. 16.5 dm³∙m^–2∙h^–1) and advanced NaCl rejection (91.7 vs. 89%) compared to the TFC membrane. A pot experiment was conducted to evaluate the effect of the irrigation with desalinated water on yield and productivity of essential oil of the sweet basil (Ocimum basilicum L.) and lavender (Lavandula multifida L.). The irrigation with desalinated water reduced significantly the soil reaction, soil electrical conductivity (EC), sodium adsorption ratio and exchangeable sodium percent in rhizospheric soil, it also enhanced the growth and oil yield of both plants compared with those irrigated with salt water.
Źródło:: Journal of Water and Land Development; 2020, 46; 216-228
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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