Angle and aspect dependent dew and fog precipitation in the Negev desert

Kidron, Giora J.

doi:10.1016/j.jhydrol.2004.06.029

Cited by 66 publications

(58 citation statements)

References 23 publications

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“…3. Metoda chłonnych tkanin (CPM): 1 -tkaniny chłonne 6 x 6 x 0.15 cm, 2 -blok drewniany 50 x 50 x 10 cm, 3 -płyta szklana 10 x 10 x 0,2 cm, 4 -sklejka 10 x 10 x 0,5 cm, α -30°, β -75°, γ -45°, δ -90°, σ -60° (Źródło: opracowanie własne na podstawie Kidron 2000, Kidron 2005) Fig. 3.…”

Section: Kolektory Rosyunclassified

“…3. Cloth Plate Method (CPM): 1 -absorbing cloth 6 x 6 x 0.15 cm, 2 -wood block 50 x 50 x 10 cm, 3 -glass plate 10 x 10 x 0.2 cm, 4 -plywood board 10 x 10 x 0.5 cm, α -30°, β -75°, γ -45°, δ -90°, σ -60° (Source: own elaboration based on Kidron 2000, Kidron 2005 Ważenie odbywa się ręcznie jedynie we wczesnych godzinach rannych i podobnie jak w przypadku przyrządu opracowanego przez Samuela Duvdevaniego otrzymuje się jedynie dobowe dawki wody powstałej w wyniku kondensacji pary wodnej.…”

Section: Kolektory Rosyunclassified

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Methods of determination of water infiltration from the atmosphere in non-rainfall periods

Dawid¹

2018

Acta Agroph.

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.pl S t r e s z c z e n i e. W pracy dokonano przeglądu ilościowych metod wyznaczania natężenia infiltracji wody do wierzchniej warstwy gleby w okresach bezopadowych. Wykorzystano: metody lizymetryczne, kolektory rosy i czujniki osadów, aluminiowe przegrody i czujniki TDR oraz modele wykorzystujące empiryczne i fenomenologiczne formuły matematyczne. Wykazano, że najwięcej zalet ma metoda wykorzystująca czujniki osadów oraz metoda z zastosowaniem aluminiowych przegród. W obu technika TDR odgrywa zasadniczą rolę. Szacowanie infiltracji wody w okresach bezopadowych stanowi cenną informację w procesie nawadniania iniekcyjnego.S ł o w a k l u c z o w e: szacowanie, infiltracja wody z atmosfery w okresach bezopadowych, technika TDR, metody lizymetryczne, kolektory rosy, czujniki osadów WSTĘP Gdy para wodna zawarta w atmosferze podlega kondensacji na wychłodzonej powierzchni, powstaje rosa. To m.in. dzięki niej wierzchnia warstwa gleby może być zasilana wodą z atmosfery także wtedy, gdy opady nie występują. Warunkiem koniecznym jest to, aby temperatura powierzchni, na której dokonuje się kondensacja, była mniejsza bądź równa aktualnej temperaturze punktu rosy. Woda w wierzchniej warstwie gleby może pojawić się również na skutek adsorpcji pary wodnej z atmosfery (Atzema i in. 1990, Janik i in. 2014). To zjawisko zachodzi, gdy temperatura powierzchni jest wyż-sza od temperatury punktu rosy, a względna wilgotność powietrza w porach gleby jest mniejsza od wilgotności względnej powietrza atmosferycznego (Agam i Berliner 2006). * Praca została sfinansowana przy wsparciu programu BIOSTRATEG Narodowego Centrum Badań i Rozwoju, w ramach projektu "Mobilny system iniekcyjnego, precyzyjnego nawadniania i nawożenia, zaspokajający indywidualne potrzeby rośliny" (BIOSTRATEG3/343547/8/NCBR/2017).

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Section: Kolektory Rosyunclassified

Methods of determination of water infiltration from the atmosphere in non-rainfall periods

Dawid¹

2018

Acta Agroph.

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“…Knowledge of the run of processes of that type is important, as water is a source of nutrients for animals and plants (Kidron, 2005;Kolev et al, 2012). In such considerations one should take into account the role of dew, hoarfrost, condenzation of water vapour contained in the soil air, and adsorption of water from the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

TDR technique for estimating the intensity of effective non rainfall

Janik

Skierucha

Błaś

et al. 2014

International Agrophysics

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A b s t r a c t. The objective of this paper is to present a method for determining diurnal distribution of the intensity of effective non rainfall water flux. It was found that the application of TDR technique for the determination of diurnal dynamics of effective non rainfall water flux requires temperature correction of sensed volumetric moisture contents. Without temperature correction the error of estimated non rainfall water flux can be as much as 26%. In addition, the effect of temperature changes on the soil surface was determined in 0.5, 1, 2, 3, 4, and 5 hours periods. It was found that the intensity of effective non rainfall water flux was determined to the greatest extent by the rate of temperature drop during the period of 3 h preceding the non rainfall water flux determination. The agreement of non rainfall water flux calculated with the method proposed and that obtained by the collector was better for dew than for hoarfrost periods.K e y w o r d s: TDR technique, effective non rainfall water flux, impermeable barrier INTRODUCTIONKnowledge of the physical processes that affect the efficiency of water infiltration into the surface horizon of soil is important in the formulation of input data for mathematical models describing the movement of water (Jacobs et al., 2002;Reinhard and Reinhard, 2005). Knowledge of the run of processes of that type is important, as water is a source of nutrients for animals and plants (Kidron, 2005;Kolev et al., 2012). In such considerations one should take into account the role of dew, hoarfrost, condenzation of water vapour contained in the soil air, and adsorption of water from the atmosphere. In regions with arid climate the effect of those processes on the water balance of the top horizon of soil may be greater than that of atmospheric precipitation (Agam and Berliner, 2006). As an example, the contribution of dew and hoarfrost in the annual water balance of the surface horizon of soil in a semi-desert area situated in Nevada, USA, amounts to 31 mm year -1 (Malek et al., 1999). With regard to the phenomena considered here, the contemporary methods for the determination of the diurnal dynamics of the intensity of water infiltration can be classified in four groups: methods consisting in measurements with the use of dew and hoarfrost collectors, lysimetric methods, models employing empirical mathematical formulae, and phenomenological models. The first group includes eg the Duvdevani dew gauge, the Cloth Plate Method and the Hiltner Dew Balance. The Duvdevani dew gauge is one of the first devices for the measurement of the dew balance (Duvdevani, 1947). The measured volume of dew deposit should be treated as an estimate and it cannot be compared with absolute values. The Cloth Plate Method is also a method in which the measurement is taken manually. The apparatus is equipped with a glass plate with dimensions of 10 x 10 x 0.2 cm, to the centre of which highly absorbing synthetic fabrics are attached, with dimensions of 6 x 6 cm (Kidron, 1998). In their study, Zangvil ...

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“…Nevertheless, their photosynthetically active period (and resulting growth rate) may be prolonged by altering their morphology and patch structure to conserve moisture (Kershaw 1985), or by preferentially occupying locations with afternoon shade caused by variable topography (Kidron 2005). This is because most mat-forming lichens associate with chlorophytes (green algae) as their photobiont, thereby allowing them to photosynthesize with relatively low levels of thallus hydration (Kershaw 1985, Nash 1996.…”

Section: Biotic (Canopy) Influencementioning

confidence: 99%

“…The frequency or duration of NPAM can, like precipitation, be described at macroclimatic scales, but may also be affected by small-scale variation in vegetation cover or topography, particularly when this variation affects whether or not a given patch receives direct irradiance from the sun (Jones 1983, Kidron 2005. This leads to an interesting ecological question: for the evaluation of vegetation-NPAM relationships, which scale is the most important, and when?…”

Section: Introductionmentioning

confidence: 99%

Understory vegetation-environment relationships of lichen-rich forests in north-central British Columbia.

Haughian¹

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Angle and aspect dependent dew and fog precipitation in the Negev desert

Cited by 66 publications

References 23 publications

Methods of determination of water infiltration from the atmosphere in non-rainfall periods

Methods of determination of water infiltration from the atmosphere in non-rainfall periods

TDR technique for estimating the intensity of effective non rainfall

Understory vegetation-environment relationships of lichen-rich forests in north-central British Columbia.

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