Wszystkie pola: infiltration - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Infiltration into layered soil covered with a depositional seal: a Green-Ampt approach
Autorzy:: Pachepsky, Y.A.
Timlin, D.
Powiązania:: https://bibliotekanauki.pl/articles/25130.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: hydraulic conductivity
soil profile
Green-Ampt method
soil
infiltration
water transport
Źródło:: International Agrophysics; 1996, 10, 1
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Water table as a source for irrigation in the Nile Delta soils
Autorzy:: Amer, A.M.
Powiązania:: https://bibliotekanauki.pl/articles/2083572.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: Infiltration functions
water table
moistening of the root zone
steady sorptivity
hydraulic conductivity
capillary rise
Opis:: The purpose of this study is to predict the contribution of the water table in moistening the root zone using theoretical and empirical equations containing the parameters of evapotranspiration, crop factor, and capillary rise in relation to the hydrophysical properties of soil. Five alluvial (clay) soil profiles located at middle Nile Delta were investigated for the application of the assumed equations. Four areas of soils were cultivated with wheat and clover in the winter and maize in the summer, and citrus trees in 2014/2015 growing season. Soil samples from the investigated areas were subjected to chemical and physical analyses. Water table depths were determined using field piezometers in the same places where the soil samples were collected. The other hydro-physical parameters were estimated. It was found that the water table contributed 20-40% of the irrigation water applied to the root zone in winter and 20% or less during the summer in the studied soils areas. An equation was derived to estimate the sorptivity (S) under dry conditions and at steady state infiltration. It was observed that S is decreased from unsaturated state to steady-state infiltration by 23.1 to 45.7% in cultivated soils and to 55.2% in uncultivated soil. Infiltration functions were estimated. It was suggested that the sorptivity at the steady infiltration rate (steady sorptivity, Sw) may be used to predict the hydraulic conductivity and the basic infiltration rate Ib. The calculated values of Ib by Sw corresponded to those obtained by infiltration experiment. This confirmed the significance of steady Sw as a new functional infiltration parameter. Also, data showed that the values of K(θ) calculated by the proposed equations were in the common ranges for such soils. The equations used (models) related K(θ) to soil pore radius (r) which were in turn based on soil hydraulic data including water retention h(θ), field basic infiltration rate, water sorptivity (S) and the distribution density function f(r) of soil pore size. The steady Sw parameter was used in the prediction of the hydraulic conductivity K(θ) and the basic (steady) infiltration rate Ib. It was concluded that in winter the water table contributed 20-40% of irrigation water applied to the root zone and less than 20% during the summer in the studied soils areas. These values should be considered in calculating the crop water requirements.
Źródło:: Acta Agrophysica; 2019, 26, 1; 79-92
1234-4125
Pojawia się w:: Acta Agrophysica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigations on the effectiveness of wastewater purification in medium sand with assisting clinoptilolite layer
Autorzy:: Kalenik, Marek
Chalecki, Marek
Powiązania:: https://bibliotekanauki.pl/articles/208175.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: hydraulic conductivity
septic tank
infiltration
ammonia
phosphorus
adsorption
landfill
przewodność hydrauliczna
szambo
infiltracja
amoniak
fosfor
adsorpcja
odciek
Opis:: Model investigations of wastewater purification were carried out in a medium sand bed with an assisting natural clinoptilolite layer 0.10 or 0.25 m thick. The effectiveness of wastewater purification related to basic qualitative parameters was in accordance with the Polish standards on sewage disposal into grounds and surface water. Medium sand soil bed with the assisting natural clinoptilolite layer 0.25 m thick showed on average the removal efficiency regarding TSS higher by 3.3%, total nitrogen by 29.3%, total phosphorus by 25.9%, reduction efficiency regarding BOD₅ by 1.1% and COD by 15.9% than that with the thinner clinoptilolite layer. The investigations confirmed that natural clinoptilolite with the granulation 1-5 mm can be used to enhance the removal of nitrogen and phosphorus compounds from wastewater with the application of infiltration drainage. However, very good effect of the TSS removal from the wastewater in the investigated soil beds can lead to their fast clogging under the infiltration drainage. Septic tanks should be designed in such a way that they retain as much TSS as possible, e.g., multi-chamber tanks instead of one-chamber ones.
Źródło:: Environment Protection Engineering; 2019, 45, 2; 117-126
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Nowa metoda pomiaru współczynnika filtracji osadów dennych
A new method of measuring the hydraulic conductivity of the bottom sediment
Autorzy:: Marciniak, M.
Chudziak, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/2075434.pdf
Data publikacji:: 2015
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: filtrometr
gradientomierz
drenaż
infiltracja
współczynnik filtracji
filtrometer
gradientmeter
drainage
infiltration
hydraulic conductivity
Opis:: Interaction of surface water and groundwater is an important element of issue in hydrogeological measurements. Surface water may infiltrate into the subsurface through the bed sediments of rivers and water reservoirs. An opposite direction of reverse water flow through these sediments is also possible with groundwater seeping into surface water. The paper presents two new measuring apparatus: a so-called “filtrometer” and a “gradientmeter”. The filtrometer enables measuring the intensity of water filtration through bed sediments, both during drainage and infiltration. The gradientmeter is designed to measure the hydraulic gradient in the bed sediments. After measuring both of these parameters, it is possible to determine the in situ hydraulic conductivity of these sediments. Usability testing of the new devices was performed under field conditions. The filtrometer and the gradientmeter were used to determine the drainage conditions of a tested section of the Parsêta river. The drainage volume measured with the instruments was in good agreement accordance with the value obtained using the differential water flow method. The proposed new method way of determining the hydraulic parameters of the bed sediments extends the present scope of hydrogeological research.
Źródło:: Przegląd Geologiczny; 2015, 63, 10/2; 919--925
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki