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Wyświetlanie 1-5 z 5
Tytuł:
Spatial and temporal assessment of surface water quality using water quality index The Saguling Reservoir, Indonesia
Autorzy:
Marselina, Mariana
Sabar, Arwin
Fahimah, Nurul
Powiązania:
https://bibliotekanauki.pl/articles/1844302.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
inverse distance weight
spatial and temporal assessment
surface water
water quality index
Opis:
Developments in agriculture, industry, and urban life have caused the deterioration of water resources, such as rivers and reservoirs in terms of their quality and quantity. This includes the Saguling Reservoir located in the Citarum Basin, Indonesia. A review of previous studies reveals that the water quality index (WQI) is efficient for the identification of pollution sources, as well as for the understanding of temporal and spatial variations in reservoir water quality. The NSFWQI (The National Sanitation Foundation water quality index) is one of WQI calculation methods. The NSFWQI is commonly used as an indicator of surface water quality. It is based on nitrate, phosphate, turbidity, temperature, faecal coliform, pH, DO, TDS, and BOD. The average NSFWQI has been 48.42 during a dry year, 43.97 during a normal year, and 45.82 during a wet year. The WQI helped to classify water quality in the Saguling Reservoir as “bad”. This study reveals that the strongest and most significant correlation between the parameter concentration and the WQI is the turbidity concentration, for which the coefficient correlation is 0.821 in a dry year, and faecal coli, for which the coefficient correlation is 0.729 in a dry year. Both parameters can be used to calculate the WQI. The research also included a nitrate concentration distribution analysis around the Saguling Reservoir using the Inverse Distance Weighted method.
Źródło:
Journal of Water and Land Development; 2021, 49; 111-120
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial differentiation of regulatory monetary valuation of agricultural land in conditions of widespread irrigation of steppe soils
Autorzy:
Pichura, Vitalii
Potravka, Larisa
Dudiak, Nataliia
Stroganov, Alexander
Dyudyaeva, Olha
Powiązania:
https://bibliotekanauki.pl/articles/1844358.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
ecological and agro-ameliorative indices
GIS technologies
irrigation
methodology
modelling
regulatory and monetary valuation
relief and climatic conditions
soil quality class
Opis:
The article presents results of quality class determination and regulatory and monetary valuation of agricultural land in the steppe soils irrigation zone using the Karmanov’s methodology of soil and climatic quality class determination and author's methodology of ecological, agro-ameliorative and climatic soils quality class determination. Based on the results of spatial modeling, a series of maps was created and characteristics of ecological, agro-ameliorative and relief and climatic components of soils quality class were presented based on the example of the Kherson Region, Ukraine. According to the results soil and climatic quality class determination, it is established that the value of the class varies from 25 to 46 points; the regulatory and monetary value of agricultural land varies from USD 490 per 1 ha for dark chestnut and chestnut alkaline soils up to USD1,360 per ha for ordinary chernozem. According to the results of ecological, agro-ameliorative and climatic soils quality class determination, it is established that the value of the class varies from 6 to 59 points; the regulatory and monetary value of agricultural land varies from USD145 per 1 ha for degraded and highly saline chestnut soils up to USD2,060 per ha for irrigated southern chernozem. The suggested methodology of soil quality class calculation can have multiple purposes. It is intended to be used for different physiographic conditions of land use to develop adaptive soils protection measures at different territorial levels of agricultural production management with the overall objective of ensuring sustainable land use.
Źródło:
Journal of Water and Land Development; 2021, 48; 182-196
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low cost artificial recreational coastal lagoon: Hydrographic, and design guidelines in development resorts
Autorzy:
El Gohary, Rasha I.M.
Powiązania:
https://bibliotekanauki.pl/articles/292628.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
artificial recreational coastal lagoon
hydrographic survey
mathematical model
production and injection wells
water quality modelling
Opis:
The objective of the research is to find low cost alternative for conventional recreational lagoons that consume water and energy used for desalination which is the only alternative for water treatment in most touristic villages all over the world. The study uses low cost recreational lagoon with new technology that use brackish water from deep wells and purify this water before entering the lagoon by controlled pulses and energyefficient ultrasound filtration. This allows to maintain the water within predefined parameters, guaranteeing standardized water quality in all lagoons. The research introduces the lagoon new technology and its low cost design including feeding and drainage wells, second, the hydrographic surveying for the coastline in the study area, third water quality modelling for the production and injection wells, fourth, use SOBEK 1-2 Mathematical Model for determine the water depth and perspective water volume for the designed lagoon. The aim of this model: Determine the relation between the water depth and the water volume for the canal and the lakes. Second, calculate the evaporation rate from the surface, Determine the number and capacity of the water wells needed to fill the canal and the lakes, and Find out the relationship between the discharge and the time needed to circulate the water in the canal and the lakes to keep their water quality. The results of the measurements from the observation well prove that the optimal discharge per each well is 0.022 m3·s–1. The construction of suggested new green technology lagoon are very low cost, completely environmentally friendly, in addition fulfils the highest standards of environmental safety.
Źródło:
Journal of Water and Land Development; 2020, 46; 45-59
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of night and day temperature on the cover colour and quality parameters of apple
Wpływ nocnej i dziennej temperatury na wybarwienie i parametry jakościowe jabłek
Autorzy:
Lakatos, L.
Biniak-Pieróg, M.
Żyromski, A.
Powiązania:
https://bibliotekanauki.pl/articles/292812.pdf
Data publikacji:
2012
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
dzienna i nocna temperatura
jakość jabłek
wybarwienie jabłek
cover colour of apple fruits
fruit quality
night and day temperature
Opis:
The colour of fruits is considered to be an important quality indicator. Sale ability greatly depends on how well covered the colour is of the specific type of fruits. We used a visual colour scale (0-100 percent) for evaluation of colorization. We distinguished the yellow, green and red cultivars. In the following studies we show those results which consider the red type apples only. Cover colour is one of the phenometric variables and it is a well-known fact that significant differences can be experienced year by year. The experienced oscillation can be the cause of inappropriate water- and nutriment supply; however it can be the result of some kind of plant disease, extremely high or low temperature, setting rate above the average and outstanding fruit density. In the present examination it is postulated that the degree of cover colour is mostly influenced by day and night temperature. Therefore, our study aims to find out whether it is true or not. Cover colour belongs to those phenometric characteristic features, only the final value of which is taken into consideration; due to their nature of establishment or forming time it seems useless to follow closely the change in the time of vegetation. We analysed the ripening groups of apple varieties separately. We have found that at winter ripening cultivars has bigger importance of genetic properties whilst at summer and autumnal ripening ones the weather effects have bigger importance. The research results shows that the day and night temperature has an important role on fruit quality parameters as sugar content, vitamin C content and on acidity also. Because we can modify the canopy temperature by using evaporative cooling system we have a chance to set up an optimal value of day and night temperature difference in the orchards.
Dobre wybarwienie owoców jest jednym z najważniejszych wskaźników ich jakości, ponieważ decyduje ono o możliwości zbytu, a zatem opłacalności uprawy. Różni się ono istotnie w poszczególnych latach, do czego przyczynia się z pewnością niewłaściwe zaopatrywanie w wodę i składniki pokarmowe. Przyczyną mogą być także choroby drzew, ekstremalnie niska lub wysoka temperatura powietrza. W niniejszej pracy przeprowadzono analizę wpływu dziennej i nocnej temperatury na stopień wybarwienia czerwonych odmian jabłek. Materiał badawczy pochodził z Újfehértó (Węgry). Analizy przeprowadzono oddzielnie dla trzech grup jabłek: dojrzewających latem, jesienią oraz zimą. Do analiz wykorzystano dzienne i nocne wartości temperatury powietrza oraz ich dobowe różnice. Stopień wybarwienia owoców oceniano w skali procentowej. Przeprowadzone analizy wykazały, że dla odmian dojrzewających w zimie większe znaczenie mają ich właściwości genetyczne, w przypadku pozostałych większą rolę odgrywają warunki pogodowe. Zarówno dzienna, jak i nocna temperatura powietrza ma istotny wpływ na jakość owoców, tj. zawartość cukru, witaminy C czy kwasowość. Poprzez zwiększenie procesu parowania z koron drzew jabłoniowych można obniżać ich temperaturę. To działanie pozwala na optymalizację różnic między dziennymi i nocnymi wartościami tego elementu.
Źródło:
Journal of Water and Land Development; 2012, no. 16 [I-VI]; 23-28
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water quality and microbial contamination status of Madawachchiya, Padaviya and Kebithigollewa areas in Anuradhapura District, Sri Lanka
Jakość i zanieczyszczenie mikrobiologiczne wody na terenach Madawachchiya, Padaviya i Kebathigollewa w dystrykcie Anuradhapura, Sri Lanka
Autorzy:
Mahagamage, M. G. Y. L.
Manage, Pathmalal M.
Powiązania:
https://bibliotekanauki.pl/articles/292577.pdf
Data publikacji:
2019
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
chronic disease of unknown etiology prevalence areas
ground and surface water
Salmonella spp.
Shigella spp.
water-borne diseasses
enteric diseases
water quality
choroby przenoszone drogą wodną
chroniczna choroba nerek o nieznanej etiologii
dur brzuszny
jakość wody
obszary przeważające
wody powierzchniowe
wody gruntowe
Opis:
Typhoid or enteric fever is a worldwide infection caused by the bacterium Salmonella enterica. In Sri Lanka, 12,823 Salmonella positive cases were recorded and 133 cases were recorded from Anuradhapura district during 2005 to 2014. Therefore, the study was carried out to identify the microbiological and chemical contamination status of forty-four water sources in Anuradhapura area during October 2016. The study was focused to determine total coliform, faecal coliform, Salmonella spp. and Shigella spp. contamination along with some physico-chemical parameters of both ground and surface water. Sampling, transportation, and analysis were performed following standard protocols. Results of the study revealed that almost all sampling locations were contaminated with both total and E. coli bacteria and the values were not within the World Health Organization and Sri Lanka Standards drinking water quality standards. Around 32% of sampling locations were positive for Salmonella spp. and among them, 2 spring sampling locations are being highly used to extract water for drinking. However, Shigella spp. was not recorded during the study period. Majority of the sampling points were not within the Sri Lanka drinking water standards for COD and 25% sampling locations were recorded greater than 750 μS∙cm–1 conductivity. Also, 55% of locations recorded very hard water where the highest values were recorded in Padaviya. The tested other water quality parameters: NO2-N, NH3-N, and total phosphate (TP) concentrations were found within the Sri Lanka drinking water standards. PCA analysis revealed that sampling locations were grouped into three groups such as; well water, tank water and springs.
Dur brzuszny jest chorobą o zasięgu światowym wywoływaną przez bakterie Salmonella enterica. W latach 2005– 2014 na Sri Lance zanotowano 12 823 przypadki zakażenia salmonellą, w tym 133 przypadki na terenie dystryktu Anuradhapura. Dlatego podjęto badania celem zidentyfikowania stanu zanieczyszczenia mikrobiologicznego i chemicznego 44 źródeł wody na terenie Anuradhapura w październiku 2016 r. Oznaczono całkowitą liczbę bakterii grupy coli, Escherichia coli, Salmonella spp. i Shigella spp. oraz niektóre fizyczne i chemiczne parametry wód gruntowych i powierzchniowych. Pobieranie próbek, transport i analizy wykonywano według standardowych procedur. Wyniki analiz wykazały, że niemal wszystkie stanowiska były zanieczyszczone zarówno bakteriami E. coli jak i bakteriami grupy coli, a ich liczebność przekraczała normy WHO i Sri Lanki. W około 32% stanowisk stwierdzono obecność Salmonella spp., wśród nich 2 źródła, które są intensywnie eksploatowane na cele spożywcze. W okresie badań nie stwierdzono obecności Shigella spp. Wody większości stanowisk nie spełniały norm Sri Lanki, pod względem poziomu ChZT, a w 25% stanowisk przewodnictwo wody przekraczało 750 μS∙cm–1. Wody 55% stanowisk wykazywały dużą twardość z najwyższymi wartościami notowanymi w Padaviya. Inne parametry chemiczne takie jak: NO2-N, NH3-N i fosfor całkowity mieściły się w normach jakości wody pitnej w Sri Lance. Za pomocą analizy PCA zagregowano badane źródła w trzy grupy: wody ze studni, wody ze zbiorników i wody źródlane.
Źródło:
Journal of Water and Land Development; 2019, 42; 1-11
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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