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    Wyświetlanie 1-7 z 7
    Tytuł:
    Analysis of the start-up of natural bio-film colonization of constructed rapid infiltration system
    Autorzy:
    Xu, W.
    Yang, J.
    Wang, J.
    Jian, Y.
    Tang, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/259259.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Constructed Rapid Infiltration System
    start-up of natural bio-film colonization
    removal rate
    COD
    Opis:
    Abstract: this paper studied the start-up of natural bio-film colonization under the conditions where wet-to-dry ratio was 1:6, hydraulic load was 0.8m3/m2·d, and water temperature was 100C-150C, it took 25d in total to become mature, after the success of bio-film colonization, the removal rate of COD and NH4+-N can be stabilized at 80%, and the removal rate of NH4+-N can reach 90% above. The microorganism was divided into the following stages during bio-film colonization:1. Reversible adhesion of cell on the surface of the carrier, 2.Irreversible adhesion of cell on the surface of the carrier, 3.Division of cell adhering to the surface of the carrier and formation of microcolony adhering to the surface of the carrier, 4.Growth of microcolony adhering to the surface of the carrier to be mature bio-film with three-dimensional structure. The process of natural bio-film colonization can be judged comprehensively according to removal rate of NH4+-N and COD, effluent pH as well as color of microbial film.
    Źródło:
    Polish Maritime Research; 2016, S 1; 32-35
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative non-linear regression - case of infiltration rate increase from upstream in valley
    Autorzy:
    Keita, A.
    Yacouba, H.
    Hayde, L.G.
    Schultz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/25502.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    drainage
    nonlinear regression
    infiltration rate
    permeability
    savannah
    flooded valley
    soil
    Opis:
    In Tropical Savannah flooded valley soils, very low infiltration rates often result in acidic conditions favourable to high concentrations of metallic ions, toxic for rice. Determination of the under-phreatic infiltration rate is important in drainage design to reclaim degraded soils. Several studies have addressed the mapping of the infiltration rate. Yet, its relationship with the toposequence of the valley is not clarified. This paper has investi- gated such a possibility, examining the case of the irrigated rice valley of Tiefora, Burkina Faso. Nine boreholes – from 1 to 5 m deep – were implemented from upstream to downstream. The Lefranc permeability test of the under-phreatic level in water- logged soils – used when the impervious layer is close to soil sur- face or absent – was conducted. First, a comparative regression was applied to the data, including all the parameters of the regression curves. In the case of dissimilarity of the infiltration processes, the comparison focused on the final permeability. The results show a permeability increase from upstream (0.10±0.10 cm h -1 ) to down- stream (greater than 20±10 cm h -1 in some places). Taking into account such a permeability increase in the subsurface drainage system design would result in implementation of more efficient and cost effective systems.
    Źródło:
    International Agrophysics; 2014, 28, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of soil infiltration capacity at selected sites
    Autorzy:
    Vicanova, M.
    Toman, F.
    Masicek, T.
    Oppeltova, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/62345.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    soil infiltration
    soil
    infiltration rate
    hydrophysical property
    soil property
    soil compaction
    Czech Republic
    territory characteristics
    soil moisture
    bulk density
    porosity
    soil quality
    Opis:
    The study deals with definition and cross-comparison of soil infiltration capacity at two selected sites located in cadastral territories of Nosislav and Žabčice, Czech Republic. In order to assess the soil infiltration capacity in the areas of interest Niva and Kovál over the course of the 2010 growing season, four trips were made with three measurements taking place during each trip. A method of doublering infiltration measurement was applied, based on the use of two concentric cylinders in field conditions and the subsequent data processing via geographical-empirical method according to Kostiakov. The soil infiltration capacity was assessed with regard to physical properties determined by an analysis of intact soil samples using Kopecky cylinders. The results indicate a reduced infiltration capacity due to soil compaction and also significant differences between the two sites, primarily caused by differences in soil type and, hence, different physical characteristics.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2011, 12
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of soil infiltration rate equation based on soil properties using multiple linear regression
    Autorzy:
    Harisuseno, Donny
    Cahya, Evi N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844413.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    infiltration rate
    model performance
    multiple linear regression
    soil property
    Opis:
    Infiltration process plays important role in water balance concept particularly in runoff analysis, groundwater recharged, and water conservation. Hence, increasing knowledge concerning infiltration process becomes essential for water manager to gain an effective solution to water resources problems. This study employed multiple linear regression for estimating infiltration rate where the soil properties used as the predictor variable and measured infiltration rate as the response variable. Field measurement was conducted at sixteen points to obtain infiltration rate using double ring infiltrometer and soil properties namely soil porosity, silt, clay, sand content, degree of saturation, and water content. The result showed that measured infiltration rate had an average initial infiltration rate (f0) of 6.92 mm∙min–1 and final infiltration rate (fc) of 1.49 mm∙min–1. Soil porosity and sand content showed a positive correlation with infiltration rate by 0.842, 0.639, respectively, while silt, clay, water content, and degree of saturation exhibited a negative correlation by –0.631, –0.743, –0.66 and –0.49, respectively. Three types of regression equations were established based on type of soil properties used as predictor variables. The model performance analysis was conducted for each equation and the result shows that the equation with five predictor variables fMLR_3 = – 62.014 + 1.142 soil porosity – 0.205 clay, – 0.063 sand – 0.301, silt + 0.07 soil water content with R2 (0.87) and Nash–Sutcliffe (0.998) gave the best result for estimating infiltration rate. The study found that soil porosity contributes mostly to the regression equation that indicates great influence in controlling soil infiltration behavior.
    Źródło:
    Journal of Water and Land Development; 2020, 47; 77-88
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluating the HYPE model for estimating groundwater recharge in a groundwater dominated catchment in Poland
    Autorzy:
    Bar-Michalczyk, D.
    Michalczyk, T.
    Witczak, S.
    Żurek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/184577.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    groundwater recharge
    effective infiltration rate
    HYPE
    catchment scale
    Opis:
    Hydrological models can be useful tools simulating climate and land use changes and their impact on nutrients outflows from a catchment area. One of them is the HYPE (Hydrological Predictions for the Environment) water quality model applicable to different spatial scales. Groundwater recharge via infiltrating precipitation is a significant water budget component. The rate of groundwater recharge in the HYPE model is estimated from the water balance in soils. The Kocinka river catchment is one of the test areas in the BONUS-Soils2Sea project where HYPE model modelling was carried out. A hydrograph, among others, is one of the modelling results and, based on it, the recharge rate of groundwater was determined. This value was compared with groundwater recharge rates estimated by the infiltration method used for the Groundwater Vulnerability Map of Poland.
    Źródło:
    Geology, Geophysics and Environment; 2017, 43, 3; 171-180
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radioactive tracer techniques used in solute transport studies in a field soil
    Autorzy:
    Lichner, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/24059.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    field soil
    hydrology
    infiltration rate
    longitudinal dispersion coefficient
    solute velocity
    soil
    soil surface
    soil matrix
    tracer technique
    solute transport
    Źródło:
    International Agrophysics; 2001, 15, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zasady poprawnego wykonania bilansu ilościowego ścieków dopływających do sieci kanalizacji sanitarnej oraz obiektów kanalizacyjnych na niej wybudowanych
    Rules of conducting correct quantitative balance of wastewater flowing into sewage network and the objects built within it
    Autorzy:
    Ćwiertnia, R.
    Ćwiertnia, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/161340.pdf
    Data publikacji:
    2018
    Wydawca:
    Polski Związek Inżynierów i Techników Budownictwa
    Tematy:
    system kanalizacyjny
    projektowanie
    błąd projektowy
    odpowiedzialność
    bilans ścieków
    natężenie objętościowe przepływu
    woda deszczowa
    woda gruntowa
    infiltracja
    sewage system
    designing
    design fault
    responsibility
    sewage balance
    volume flow rate
    rain water
    ground water
    infiltration
    Opis:
    Tylko poprawnie wykonany bilans ilościowy ścieków zapewni optymalne działanie sieci kanalizacji sanitarnej oraz obiektów na niej wybudowanych. Projektant i użytkownik ww. sieci kanalizacyjnej dowie się, jakie niezależne ilości obciążają tą sieć kanalizacyjną oraz jak je należy obliczać. Z treści artykułu wynika, jak ważne jest wnikliwe dokonanie analizy czynników wpływających na bilans ilościowy ścieków oraz jaki zakres powinna osiągnąć odpowiedzialność za wykonanie projektu, jego uzgodnienie, wydanie warunków technicznych i jego zaopiniowanie lub uzgodnienie.
    Only a properly done quantitative balance of wastewater will ensure the optimal performance a sewage network and the objects built within it. Both designers and users of this sewage network will find out how much independent amount of sewage loads the network and how it should be calculated. The contents of the article clearly demonstrates how important it is to make an in-depth analysis of various factors influencing the quantitative balance and what should be the range of designers’ responsibility for a project, meeting its technical conditions, agreeing them and evaluating.
    Źródło:
    Przegląd Budowlany; 2018, 89, 7-8; 51-56
    0033-2038
    Pojawia się w:
    Przegląd Budowlany
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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