TY  - JOUR
AU  - Stanić, Filip
AU  - Tchiguirinskaia, Ioulia
AU  - Versini, Pierre-Antoine
AU  - Cui, Yu-Jun
AU  - Delage, Pierre
AU  - Aimedieu, Patrick
AU  - Tarquis Alfonso, Ana Maria
AU  - Bornert, Michel
AU  - Schertzer, Daniel
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3366
AB  - Previous works related to the application of the multifractal theory for analyzing the grain size distribution (GSD), showed the potential of this approach to deal with this complex issue. However, absence of the practical application of this kind of statistical analysis raised some doubts among the soil scientists. Compared to the experimental dry sieving method, which is based on mass representations of different grain sizes, the approach presented in this work relies on the analysis of grain densities (density indicators) scanned by means of X-ray CT (Computed Tomography). By reducing the resolution of the scanned soil image(s), the cumulative representation of solid particles equal to or larger than the actual discretization element can be determined, and described analytically by means of the universal multifractals (UM). For validation of the new UM approach, the X-ray CT results of three different soils were used: the volcanic substrate covering Green Wave (a green roof of Champs-sur-Marne in France), and two horizons of the soil collected from the low land mountain area of Sierra de Guadarrama in Spain. Comparison between the proposed UM model and the experimental data of these three materials confirms that the GSD can be reasonably well predicted from the scanned images of soils covering wide range of grain sizes. The UM model, unlike the fractal-based models, accounts for fractal dimension that depends on grain size, and hence, based on the preliminary results presented in this work, it could be rather useful in case of multi-modal soils whose GSD curves are described with multiple fractal dimensions.
PB  - Elsevier
T2  - Geoderma
T1  - A new multifractal-based grain size distribution model
IS  - 3-4
VL  - 404
DO  - 10.1016/j.geoderma.2021.115294
ER  - 

@article{
author = "Stanić, Filip and Tchiguirinskaia, Ioulia and Versini, Pierre-Antoine and Cui, Yu-Jun and Delage, Pierre and Aimedieu, Patrick and Tarquis Alfonso, Ana Maria and Bornert, Michel and Schertzer, Daniel",
year = "2021",
abstract = "Previous works related to the application of the multifractal theory for analyzing the grain size distribution (GSD), showed the potential of this approach to deal with this complex issue. However, absence of the practical application of this kind of statistical analysis raised some doubts among the soil scientists. Compared to the experimental dry sieving method, which is based on mass representations of different grain sizes, the approach presented in this work relies on the analysis of grain densities (density indicators) scanned by means of X-ray CT (Computed Tomography). By reducing the resolution of the scanned soil image(s), the cumulative representation of solid particles equal to or larger than the actual discretization element can be determined, and described analytically by means of the universal multifractals (UM). For validation of the new UM approach, the X-ray CT results of three different soils were used: the volcanic substrate covering Green Wave (a green roof of Champs-sur-Marne in France), and two horizons of the soil collected from the low land mountain area of Sierra de Guadarrama in Spain. Comparison between the proposed UM model and the experimental data of these three materials confirms that the GSD can be reasonably well predicted from the scanned images of soils covering wide range of grain sizes. The UM model, unlike the fractal-based models, accounts for fractal dimension that depends on grain size, and hence, based on the preliminary results presented in this work, it could be rather useful in case of multi-modal soils whose GSD curves are described with multiple fractal dimensions.",
publisher = "Elsevier",
journal = "Geoderma",
title = "A new multifractal-based grain size distribution model",
number = "3-4",
volume = "404",
doi = "10.1016/j.geoderma.2021.115294"
}

Stanić, F., Tchiguirinskaia, I., Versini, P., Cui, Y., Delage, P., Aimedieu, P., Tarquis Alfonso, A. M., Bornert, M.,& Schertzer, D.. (2021). A new multifractal-based grain size distribution model. in Geoderma
Elsevier., 404(3-4).
https://doi.org/10.1016/j.geoderma.2021.115294

Stanić F, Tchiguirinskaia I, Versini P, Cui Y, Delage P, Aimedieu P, Tarquis Alfonso AM, Bornert M, Schertzer D. A new multifractal-based grain size distribution model. in Geoderma. 2021;404(3-4).
doi:10.1016/j.geoderma.2021.115294 .

Stanić, Filip, Tchiguirinskaia, Ioulia, Versini, Pierre-Antoine, Cui, Yu-Jun, Delage, Pierre, Aimedieu, Patrick, Tarquis Alfonso, Ana Maria, Bornert, Michel, Schertzer, Daniel, "A new multifractal-based grain size distribution model" in Geoderma, 404, no. 3-4 (2021),
https://doi.org/10.1016/j.geoderma.2021.115294 . .

TY  - CONF
AU  - Stanić, Filip
AU  - Delage, Pierre
AU  - Cui, Yu-Jun
AU  - De Laure, Emmanuel
AU  - Versini, Pierre-Antoine
AU  - Schertzer, Daniel
AU  - Tchiguirinskaia, Ioulia
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3364
AB  - Based on tests carried out on a specific device allowing to determine the water retention and transport properties of granular media at low suctions, an alternative approach to Kunze and Kirkham’s method of accounting for the impedance effects due to the high air entry value ceramic disk when using Gardner’s method is proposed. Impedance effects are accounted for by proposing analytical solutions to the equations governing water transfers occurring within the specimen and the ceramic disk. By using some experimental data obtained on a volcanic granular substrate used for urban green roofs, the method is successfully compared to Kunze and Kirkham’s graphical method. Its advantages are to be simpler of use and not operator dependent. A detailed examination of the performance of our method compared to those of Gardner and Kunze and Kirkham is carried out based on experimental data, that confirm its validity.
PB  - E3S Web of Conferences
C3  - 4th European Conference on Unsaturated Soils (E-UNSAT 2020)
T1  - A new approach of accounting for impedance effects in Gardner’s method of determining the hydraulic conductivity of unsaturated soils
VL  - 195
DO  - 10.1051/e3sconf/202019503012
ER  - 

@conference{
author = "Stanić, Filip and Delage, Pierre and Cui, Yu-Jun and De Laure, Emmanuel and Versini, Pierre-Antoine and Schertzer, Daniel and Tchiguirinskaia, Ioulia",
year = "2020",
abstract = "Based on tests carried out on a specific device allowing to determine the water retention and transport properties of granular media at low suctions, an alternative approach to Kunze and Kirkham’s method of accounting for the impedance effects due to the high air entry value ceramic disk when using Gardner’s method is proposed. Impedance effects are accounted for by proposing analytical solutions to the equations governing water transfers occurring within the specimen and the ceramic disk. By using some experimental data obtained on a volcanic granular substrate used for urban green roofs, the method is successfully compared to Kunze and Kirkham’s graphical method. Its advantages are to be simpler of use and not operator dependent. A detailed examination of the performance of our method compared to those of Gardner and Kunze and Kirkham is carried out based on experimental data, that confirm its validity.",
publisher = "E3S Web of Conferences",
journal = "4th European Conference on Unsaturated Soils (E-UNSAT 2020)",
title = "A new approach of accounting for impedance effects in Gardner’s method of determining the hydraulic conductivity of unsaturated soils",
volume = "195",
doi = "10.1051/e3sconf/202019503012"
}

Stanić, F., Delage, P., Cui, Y., De Laure, E., Versini, P., Schertzer, D.,& Tchiguirinskaia, I.. (2020). A new approach of accounting for impedance effects in Gardner’s method of determining the hydraulic conductivity of unsaturated soils. in 4th European Conference on Unsaturated Soils (E-UNSAT 2020)
E3S Web of Conferences., 195.
https://doi.org/10.1051/e3sconf/202019503012

Stanić F, Delage P, Cui Y, De Laure E, Versini P, Schertzer D, Tchiguirinskaia I. A new approach of accounting for impedance effects in Gardner’s method of determining the hydraulic conductivity of unsaturated soils. in 4th European Conference on Unsaturated Soils (E-UNSAT 2020). 2020;195.
doi:10.1051/e3sconf/202019503012 .

Stanić, Filip, Delage, Pierre, Cui, Yu-Jun, De Laure, Emmanuel, Versini, Pierre-Antoine, Schertzer, Daniel, Tchiguirinskaia, Ioulia, "A new approach of accounting for impedance effects in Gardner’s method of determining the hydraulic conductivity of unsaturated soils" in 4th European Conference on Unsaturated Soils (E-UNSAT 2020), 195 (2020),
https://doi.org/10.1051/e3sconf/202019503012 . .

TY  - CONF
AU  - Stanić, Filip
AU  - Delage, Pierre
AU  - Cui, Yu-Jun
AU  - De Laure, Emmanuel
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3363
AB  - The water retention curve and the hydraulic conductivity function of a volcanic coarse granular material used as a substrate in an urban green roof in the Paris area was carried out on a newly developed device, in which low suctions were controlled. In the same cell, a hanging column system was used for controlling smaller suctions (up to 32 kPa ) and the axis translation technique for larger suctions (up to 50 kPa ). Water exchanges were monitored in connected tubes by using a high accuracy differential pressure transducer. The step changes in suction were also used to determine the hydraulic conductivity function by means of Gardner’s method, accounting for the impedance effects due to the high air entry value ceramic porous disk with Kunze and Kirkham’s method. van Genuchten and Brooks and Corey models were used for the water retention curve, but the hydraulic conductivity functions derived from these expressions appeared to lead to a significant under-estimation, confirming the need of operational and simple device for the experimental determination of the hydraulic conductivity function.
PB  - E3S Web of Conferences
T1  - Water retention and transfer properties of a Green roof volcanic substrate
VL  - 195
DO  - 10.1051/e3sconf/202019503011
ER  - 

@conference{
author = "Stanić, Filip and Delage, Pierre and Cui, Yu-Jun and De Laure, Emmanuel",
year = "2020",
abstract = "The water retention curve and the hydraulic conductivity function of a volcanic coarse granular material used as a substrate in an urban green roof in the Paris area was carried out on a newly developed device, in which low suctions were controlled. In the same cell, a hanging column system was used for controlling smaller suctions (up to 32 kPa ) and the axis translation technique for larger suctions (up to 50 kPa ). Water exchanges were monitored in connected tubes by using a high accuracy differential pressure transducer. The step changes in suction were also used to determine the hydraulic conductivity function by means of Gardner’s method, accounting for the impedance effects due to the high air entry value ceramic porous disk with Kunze and Kirkham’s method. van Genuchten and Brooks and Corey models were used for the water retention curve, but the hydraulic conductivity functions derived from these expressions appeared to lead to a significant under-estimation, confirming the need of operational and simple device for the experimental determination of the hydraulic conductivity function.",
publisher = "E3S Web of Conferences",
title = "Water retention and transfer properties of a Green roof volcanic substrate",
volume = "195",
doi = "10.1051/e3sconf/202019503011"
}

Stanić, F., Delage, P., Cui, Y.,& De Laure, E.. (2020). Water retention and transfer properties of a Green roof volcanic substrate. 
E3S Web of Conferences., 195.
https://doi.org/10.1051/e3sconf/202019503011

Stanić F, Delage P, Cui Y, De Laure E. Water retention and transfer properties of a Green roof volcanic substrate. 2020;195.
doi:10.1051/e3sconf/202019503011 .

Stanić, Filip, Delage, Pierre, Cui, Yu-Jun, De Laure, Emmanuel, "Water retention and transfer properties of a Green roof volcanic substrate", 195 (2020),
https://doi.org/10.1051/e3sconf/202019503011 . .

TY  - JOUR
AU  - Stanić, Filip
AU  - Delage, Pierre
AU  - Cui, Yu-Jun
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3370
AB  - Merenje vodoprovodljivosti zemljišta u nezasićenim uslovima je znatno komplikovanije i tehnički zahtevnije od merenja krive vlažnosti. Zbog toga za određivanje krive vodoprovodljivosti često primenjuju inverzne metode koje koriste rezultate merenja nastale tokom testa određivanja krive vlažnosti. Na taj način se obe krive hidrauličkih karakteristika određuju jednim testom, čime se štedi na vremenu i opremi. U literaturi se mogu pronaći različiti tipovi inverznih metoda, među kojima su danas najzastupljenije numeričke, dok su fundamentalne analitičke metode, nastale sredinom prošlog veka, skoro potpuno skrajnute. Cilj ovog rada je predstavljanje unapređenih analitičkih metoda, zasnovanih na čuvenoj Gardner-ovoj metodi, koje su jednostavne za primenu a uz to pružaju pouzdanije rezultate od postojećih inverznih metoda. Validnost ovih metoda pokazana je na različitim tipovima zemljišta, pri čemu su dobijeni rezultati upoređeni sa postojećim analitičkim metodama. Time je pokazano da je predstavljena metodologija pouzdanija i jednostavnija za primenu ne samo od postojećih analitičkih, već i od numeričlih inverznih metoda koje umesto eksperimentalne krive vodoprovodljivosti kao rezultat daju optimizovanu paranetarsku funkciju.
PB  - Srpsko društvo za odvodnjavanje i navodnjavanje
T2  - Vodoprivreda
T1  - Inovativna metodologija za eksperimentalno određivanje vodoprovodljivosti nezasićenog zemljišta
EP  - 234
IS  - 306-308
SP  - 223
VL  - 52
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3370
ER  - 

@article{
author = "Stanić, Filip and Delage, Pierre and Cui, Yu-Jun",
year = "2020",
abstract = "Merenje vodoprovodljivosti zemljišta u nezasićenim uslovima je znatno komplikovanije i tehnički zahtevnije od merenja krive vlažnosti. Zbog toga za određivanje krive vodoprovodljivosti često primenjuju inverzne metode koje koriste rezultate merenja nastale tokom testa određivanja krive vlažnosti. Na taj način se obe krive hidrauličkih karakteristika određuju jednim testom, čime se štedi na vremenu i opremi. U literaturi se mogu pronaći različiti tipovi inverznih metoda, među kojima su danas najzastupljenije numeričke, dok su fundamentalne analitičke metode, nastale sredinom prošlog veka, skoro potpuno skrajnute. Cilj ovog rada je predstavljanje unapređenih analitičkih metoda, zasnovanih na čuvenoj Gardner-ovoj metodi, koje su jednostavne za primenu a uz to pružaju pouzdanije rezultate od postojećih inverznih metoda. Validnost ovih metoda pokazana je na različitim tipovima zemljišta, pri čemu su dobijeni rezultati upoređeni sa postojećim analitičkim metodama. Time je pokazano da je predstavljena metodologija pouzdanija i jednostavnija za primenu ne samo od postojećih analitičkih, već i od numeričlih inverznih metoda koje umesto eksperimentalne krive vodoprovodljivosti kao rezultat daju optimizovanu paranetarsku funkciju.",
publisher = "Srpsko društvo za odvodnjavanje i navodnjavanje",
journal = "Vodoprivreda",
title = "Inovativna metodologija za eksperimentalno određivanje vodoprovodljivosti nezasićenog zemljišta",
pages = "234-223",
number = "306-308",
volume = "52",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3370"
}

Stanić, F., Delage, P.,& Cui, Y.. (2020). Inovativna metodologija za eksperimentalno određivanje vodoprovodljivosti nezasićenog zemljišta. in Vodoprivreda
Srpsko društvo za odvodnjavanje i navodnjavanje., 52(306-308), 223-234.
https://hdl.handle.net/21.15107/rcub_grafar_3370

Stanić F, Delage P, Cui Y. Inovativna metodologija za eksperimentalno određivanje vodoprovodljivosti nezasićenog zemljišta. in Vodoprivreda. 2020;52(306-308):223-234.
https://hdl.handle.net/21.15107/rcub_grafar_3370 .

Stanić, Filip, Delage, Pierre, Cui, Yu-Jun, "Inovativna metodologija za eksperimentalno određivanje vodoprovodljivosti nezasićenog zemljišta" in Vodoprivreda, 52, no. 306-308 (2020):223-234,
https://hdl.handle.net/21.15107/rcub_grafar_3370 .

TY  - JOUR
AU  - Stanić, Filip
AU  - Delage, Pierre
AU  - Tchiguirinskaia, Ioulia
AU  - Versini, Pierre-Antoine
AU  - Cui, Yu-Jun
AU  - Schertzer, Daniel
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3365
AB  - To describe the water retention and transfer properties of an unsaturated soil over the whole range of matric suction, it is necessary to account for both capillary and adsorption phenomena. Existing models combine well-known empirical functions for capillary water at lower suctions and more physically based ones for adsorptive water at higher suctions. To determine their full set of parameters, they however require different optimization procedures, among which those coming from capillary models are empirical. In this context, the main objective of this work is to develop a simple and robust physically based model of the water retention and transfer properties of unsaturated soils valid from saturation to oven dryness. To do so, new capillary-based water retention and hydraulic conductivity functions founded on the fractal approach have been derived from the pore size distribution, by means of the Young-Laplace law and Mualem's model. To describe adsorption phenomena, these functions are combined with those used in the Peters-Iden-Durner (PID) model, providing a model along the full range of suctions, with less parameters than the existing models. Our work also shows that some parameters are directly determined from the experimental grain size distribution data (the fractal dimension), or from the water retention data (air entry suction and residual water content), leaving only two parameters to be optimized. The model was successfully validated with respect to published experimental data from 10 different coarse, sandy, and clayey soils.
PB  - Wiley
T2  - Water Resources Research
T1  - A New Fractal Approach to Account for Capillary and Adsorption Phenomena in the Water Retention and Transfer Properties of Unsaturated Soils
IS  - 12
VL  - 56
DO  - 10.1029/2020WR027808
ER  - 

@article{
author = "Stanić, Filip and Delage, Pierre and Tchiguirinskaia, Ioulia and Versini, Pierre-Antoine and Cui, Yu-Jun and Schertzer, Daniel",
year = "2020",
abstract = "To describe the water retention and transfer properties of an unsaturated soil over the whole range of matric suction, it is necessary to account for both capillary and adsorption phenomena. Existing models combine well-known empirical functions for capillary water at lower suctions and more physically based ones for adsorptive water at higher suctions. To determine their full set of parameters, they however require different optimization procedures, among which those coming from capillary models are empirical. In this context, the main objective of this work is to develop a simple and robust physically based model of the water retention and transfer properties of unsaturated soils valid from saturation to oven dryness. To do so, new capillary-based water retention and hydraulic conductivity functions founded on the fractal approach have been derived from the pore size distribution, by means of the Young-Laplace law and Mualem's model. To describe adsorption phenomena, these functions are combined with those used in the Peters-Iden-Durner (PID) model, providing a model along the full range of suctions, with less parameters than the existing models. Our work also shows that some parameters are directly determined from the experimental grain size distribution data (the fractal dimension), or from the water retention data (air entry suction and residual water content), leaving only two parameters to be optimized. The model was successfully validated with respect to published experimental data from 10 different coarse, sandy, and clayey soils.",
publisher = "Wiley",
journal = "Water Resources Research",
title = "A New Fractal Approach to Account for Capillary and Adsorption Phenomena in the Water Retention and Transfer Properties of Unsaturated Soils",
number = "12",
volume = "56",
doi = "10.1029/2020WR027808"
}

Stanić, F., Delage, P., Tchiguirinskaia, I., Versini, P., Cui, Y.,& Schertzer, D.. (2020). A New Fractal Approach to Account for Capillary and Adsorption Phenomena in the Water Retention and Transfer Properties of Unsaturated Soils. in Water Resources Research
Wiley., 56(12).
https://doi.org/10.1029/2020WR027808

Stanić F, Delage P, Tchiguirinskaia I, Versini P, Cui Y, Schertzer D. A New Fractal Approach to Account for Capillary and Adsorption Phenomena in the Water Retention and Transfer Properties of Unsaturated Soils. in Water Resources Research. 2020;56(12).
doi:10.1029/2020WR027808 .

Stanić, Filip, Delage, Pierre, Tchiguirinskaia, Ioulia, Versini, Pierre-Antoine, Cui, Yu-Jun, Schertzer, Daniel, "A New Fractal Approach to Account for Capillary and Adsorption Phenomena in the Water Retention and Transfer Properties of Unsaturated Soils" in Water Resources Research, 56, no. 12 (2020),
https://doi.org/10.1029/2020WR027808 . .

TY  - JOUR
AU  - Stanić, Filip
AU  - Delage, Pierre
AU  - Cui, Yu-Jun
AU  - De Laure, Emmanuel
AU  - Versini, Pierre-Antoine
AU  - Schertzer, Daniel
AU  - Tchiguirinskaia, Ioulia
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3369
AB  - Gardner's (1956, https://doi.org/10.2136/sssaj1956.03615995002000030006x) transient method of measuring the hydraulic conductivity function of unsaturated media has been largely used, together with the improved graphical method proposed by Kunze and Kirkham (1962, https://doi.org/10.2136/sssaj1962.03615995002600050006x) to account for the impedance effect resulting from using a low hydraulic conductivity ceramic disk in porous plate testing. These methods are nowadays seldom used, since they have been replaced by numerical back analysis and methods for parameter optimization. Based on tests carried out on a specific device allowing to determine the water retention and transport properties of water in a coarse granular media at low suctions (up to 50 kPa), it was found necessary to account (i) for impedance effects and (ii) for the effects of nonconstant suction increments, as is often the case when using the hanging column technique. A new method is proposed to account for impedance effects, based on an analytical solution of the equations governing water transfer. The validity of this method is tested by considering experimental data from three distinct materials: a coarse green roof volcanic substrate, poorly graded sand, and undisturbed silty clay. Compared to the graphical method Kunze and Kirkham's method, it is less operator-dependent and hence more objective. It is also simpler than numerical back analysis methods, since it does not require any use of numerical code or parameter optimization algorithm, providing a more direct and reliable access to the hydraulic conductivity. An analytical solution is also proposed to solve the problem resulting from the application of a nonconstant suction increment.
PB  - Wiley Open Access
PB  - American Geophysical Union
T2  - Water Resources Research
T1  - Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non‐saturated Media: Accounting for Impedance Effects and Non‐constant Imposed Suction Increment
IS  - 1
VL  - 56
DO  - 10.1029/2019WR026098
ER  - 

@article{
author = "Stanić, Filip and Delage, Pierre and Cui, Yu-Jun and De Laure, Emmanuel and Versini, Pierre-Antoine and Schertzer, Daniel and Tchiguirinskaia, Ioulia",
year = "2019",
abstract = "Gardner's (1956, https://doi.org/10.2136/sssaj1956.03615995002000030006x) transient method of measuring the hydraulic conductivity function of unsaturated media has been largely used, together with the improved graphical method proposed by Kunze and Kirkham (1962, https://doi.org/10.2136/sssaj1962.03615995002600050006x) to account for the impedance effect resulting from using a low hydraulic conductivity ceramic disk in porous plate testing. These methods are nowadays seldom used, since they have been replaced by numerical back analysis and methods for parameter optimization. Based on tests carried out on a specific device allowing to determine the water retention and transport properties of water in a coarse granular media at low suctions (up to 50 kPa), it was found necessary to account (i) for impedance effects and (ii) for the effects of nonconstant suction increments, as is often the case when using the hanging column technique. A new method is proposed to account for impedance effects, based on an analytical solution of the equations governing water transfer. The validity of this method is tested by considering experimental data from three distinct materials: a coarse green roof volcanic substrate, poorly graded sand, and undisturbed silty clay. Compared to the graphical method Kunze and Kirkham's method, it is less operator-dependent and hence more objective. It is also simpler than numerical back analysis methods, since it does not require any use of numerical code or parameter optimization algorithm, providing a more direct and reliable access to the hydraulic conductivity. An analytical solution is also proposed to solve the problem resulting from the application of a nonconstant suction increment.",
publisher = "Wiley Open Access, American Geophysical Union",
journal = "Water Resources Research",
title = "Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non‐saturated Media: Accounting for Impedance Effects and Non‐constant Imposed Suction Increment",
number = "1",
volume = "56",
doi = "10.1029/2019WR026098"
}

Stanić, F., Delage, P., Cui, Y., De Laure, E., Versini, P., Schertzer, D.,& Tchiguirinskaia, I.. (2019). Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non‐saturated Media: Accounting for Impedance Effects and Non‐constant Imposed Suction Increment. in Water Resources Research
Wiley Open Access., 56(1).
https://doi.org/10.1029/2019WR026098

Stanić F, Delage P, Cui Y, De Laure E, Versini P, Schertzer D, Tchiguirinskaia I. Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non‐saturated Media: Accounting for Impedance Effects and Non‐constant Imposed Suction Increment. in Water Resources Research. 2019;56(1).
doi:10.1029/2019WR026098 .

Stanić, Filip, Delage, Pierre, Cui, Yu-Jun, De Laure, Emmanuel, Versini, Pierre-Antoine, Schertzer, Daniel, Tchiguirinskaia, Ioulia, "Two Improvements to Gardner's Method of Measuring the Hydraulic Conductivity of Non‐saturated Media: Accounting for Impedance Effects and Non‐constant Imposed Suction Increment" in Water Resources Research, 56, no. 1 (2019),
https://doi.org/10.1029/2019WR026098 . .

TY  - JOUR
AU  - Stanić, Filip
AU  - Cui, Yu-Jun
AU  - Delage, Pierre
AU  - De Laure, Emmanuel
AU  - Versini, Pierre-Antoine
AU  - Schertzer, Daniel
AU  - Tchiguirinskaia, Ioulia
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3368
AB  - The determination of the water retention curve (WRC) and hydraulic conductivity function (HCF) of a specific volcanic coarse granular material used as a substrate for urban green roofs in Europe was carried out on a newly developed specific device in which low suctions, typical of coarse granular materials, were controlled. Smaller suctions (up to 32 kPa) were imposed by using a hanging column system, and larger suctions (between 32 and 50 kPa) were imposed by using the axis translation technique in the same cell. The changes in suction during the tests were monitored by using a high accuracy differential pressure transducer. They were also used to determine the HCF by means of both Kunze and Kirkham’s and Gardner’s methods. The former technique was used at low suctions (<4 kPa) to account for the impedance effects due to the high air entry value ceramic porous disk and the latter was used between 4 and 50 kPa. Good comparability was observed in the data from both methods, demonstrating the good perfor- mance of the device. The mathematical expressions of the WRC of van Genuchten and Brooks and Corey were used, and a good fitting with our experimental data was obtained. Conversely, the HCFs derived from these expressions appeared to lead to a significant underestimation, con- firming the need of an operational and simple device for the experimental determination of the HCF. Also, this material proved to be an appropriate material for green urban infrastructures, because of its lightweight, satisfactory water retention capability and hydraulic conductivity.
PB  - ASTM Compass
PB  - ASTM International (American Society For Testing and Materials)
T2  - Geotechnical Testing Journal (GTJ)
T1  - A Device for the Simultaneous Determination of the Water Retention Properties and the Hydraulic Conductivity Function of an Unsaturated Coarse Material; Application to a Green-Roof Volcanic Substrate
IS  - 3
VL  - 43
DO  - 10.1520/GTJ20170443
ER  - 

@article{
author = "Stanić, Filip and Cui, Yu-Jun and Delage, Pierre and De Laure, Emmanuel and Versini, Pierre-Antoine and Schertzer, Daniel and Tchiguirinskaia, Ioulia",
year = "2019",
abstract = "The determination of the water retention curve (WRC) and hydraulic conductivity function (HCF) of a specific volcanic coarse granular material used as a substrate for urban green roofs in Europe was carried out on a newly developed specific device in which low suctions, typical of coarse granular materials, were controlled. Smaller suctions (up to 32 kPa) were imposed by using a hanging column system, and larger suctions (between 32 and 50 kPa) were imposed by using the axis translation technique in the same cell. The changes in suction during the tests were monitored by using a high accuracy differential pressure transducer. They were also used to determine the HCF by means of both Kunze and Kirkham’s and Gardner’s methods. The former technique was used at low suctions (<4 kPa) to account for the impedance effects due to the high air entry value ceramic porous disk and the latter was used between 4 and 50 kPa. Good comparability was observed in the data from both methods, demonstrating the good perfor- mance of the device. The mathematical expressions of the WRC of van Genuchten and Brooks and Corey were used, and a good fitting with our experimental data was obtained. Conversely, the HCFs derived from these expressions appeared to lead to a significant underestimation, con- firming the need of an operational and simple device for the experimental determination of the HCF. Also, this material proved to be an appropriate material for green urban infrastructures, because of its lightweight, satisfactory water retention capability and hydraulic conductivity.",
publisher = "ASTM Compass, ASTM International (American Society For Testing and Materials)",
journal = "Geotechnical Testing Journal (GTJ)",
title = "A Device for the Simultaneous Determination of the Water Retention Properties and the Hydraulic Conductivity Function of an Unsaturated Coarse Material; Application to a Green-Roof Volcanic Substrate",
number = "3",
volume = "43",
doi = "10.1520/GTJ20170443"
}

Stanić, F., Cui, Y., Delage, P., De Laure, E., Versini, P., Schertzer, D.,& Tchiguirinskaia, I.. (2019). A Device for the Simultaneous Determination of the Water Retention Properties and the Hydraulic Conductivity Function of an Unsaturated Coarse Material; Application to a Green-Roof Volcanic Substrate. in Geotechnical Testing Journal (GTJ)
ASTM Compass., 43(3).
https://doi.org/10.1520/GTJ20170443

Stanić F, Cui Y, Delage P, De Laure E, Versini P, Schertzer D, Tchiguirinskaia I. A Device for the Simultaneous Determination of the Water Retention Properties and the Hydraulic Conductivity Function of an Unsaturated Coarse Material; Application to a Green-Roof Volcanic Substrate. in Geotechnical Testing Journal (GTJ). 2019;43(3).
doi:10.1520/GTJ20170443 .

Stanić, Filip, Cui, Yu-Jun, Delage, Pierre, De Laure, Emmanuel, Versini, Pierre-Antoine, Schertzer, Daniel, Tchiguirinskaia, Ioulia, "A Device for the Simultaneous Determination of the Water Retention Properties and the Hydraulic Conductivity Function of an Unsaturated Coarse Material; Application to a Green-Roof Volcanic Substrate" in Geotechnical Testing Journal (GTJ), 43, no. 3 (2019),
https://doi.org/10.1520/GTJ20170443 . .

TY  - CONF
AU  - Stanić, Filip
AU  - Delage, Pierre
AU  - Cui, Yu-Jun
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3372
AB  - Зелени кровови, осим ублажавања екстремних температура у градским срединама, имају значајан утицај и на смањивање урбаног отицаја. Како би се са хидролошког аспекта проценио њихов значај неопходно је одредити ретензионе и транспортне карактеристике супстрата коришћеног за покривање кровне површине. Ове карактеристике су описане уз помоћ две криве: криве влажности и криве водопроводљивости за незасићену средину. Поменуте криве најчешће одређују тзв. инверзном анализом („back analysis“), односно калибрисањем неких од добро познатих аналитичких модела (ван Генухтен, Брукс и Кори, итд.) са циљем да се обезбеди најбоље могуће слагање моделираног са мереним отицајем. Имајући у виду да се за изградњу зелених кровова користе лаки, неконвенционални супстрати који не оптерећују значајно кровну конструкцију, поменуте аналитичке криве веома често не могу поуздано да апроксимирају њихове хидрауличке карактеристике. Због тога је неопходно екпериментално одређивање криве влажности и криве водопроводљивости. С обзиром на то да овакви експерименти изискују много времена и различитих технологија, ово истраживање је засновано на идеји да се уз помоћ само једног експеримента одреде обе криве хидрауличких карактеристика. Како би се то извело специјална апаратура базирана на принципу тенезиометра је дизајнирана. Крива влажности се директно одређује применом “Multi-step outflow” теста, док се за одређивање криве водопроводљивости користе детаљна мерења истицања из узорка током теста. Ова мерења су затим анализирана коришћењем неколико инверзних метода за одређивање криве водопроводљивости које су међусобно поређене. Описана методологија је коршћена за одређивање хидрауличких карактеристика супстрата коришћеног у случају таласастог зеленог крова који се налази у предграђу Париза, Шан на Марни.
C3  - 18. savetovanje SDHI & SDH, Niš, 25-26. oktobar 2018
T1  - Experimental determination of the hydraulic characteristics of the substrate used for covering green roof
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3372
ER  - 

@conference{
author = "Stanić, Filip and Delage, Pierre and Cui, Yu-Jun",
year = "2018",
abstract = "Зелени кровови, осим ублажавања екстремних температура у градским срединама, имају значајан утицај и на смањивање урбаног отицаја. Како би се са хидролошког аспекта проценио њихов значај неопходно је одредити ретензионе и транспортне карактеристике супстрата коришћеног за покривање кровне површине. Ове карактеристике су описане уз помоћ две криве: криве влажности и криве водопроводљивости за незасићену средину. Поменуте криве најчешће одређују тзв. инверзном анализом („back analysis“), односно калибрисањем неких од добро познатих аналитичких модела (ван Генухтен, Брукс и Кори, итд.) са циљем да се обезбеди најбоље могуће слагање моделираног са мереним отицајем. Имајући у виду да се за изградњу зелених кровова користе лаки, неконвенционални супстрати који не оптерећују значајно кровну конструкцију, поменуте аналитичке криве веома често не могу поуздано да апроксимирају њихове хидрауличке карактеристике. Због тога је неопходно екпериментално одређивање криве влажности и криве водопроводљивости. С обзиром на то да овакви експерименти изискују много времена и различитих технологија, ово истраживање је засновано на идеји да се уз помоћ само једног експеримента одреде обе криве хидрауличких карактеристика. Како би се то извело специјална апаратура базирана на принципу тенезиометра је дизајнирана. Крива влажности се директно одређује применом “Multi-step outflow” теста, док се за одређивање криве водопроводљивости користе детаљна мерења истицања из узорка током теста. Ова мерења су затим анализирана коришћењем неколико инверзних метода за одређивање криве водопроводљивости које су међусобно поређене. Описана методологија је коршћена за одређивање хидрауличких карактеристика супстрата коришћеног у случају таласастог зеленог крова који се налази у предграђу Париза, Шан на Марни.",
journal = "18. savetovanje SDHI & SDH, Niš, 25-26. oktobar 2018",
title = "Experimental determination of the hydraulic characteristics of the substrate used for covering green roof",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3372"
}

Stanić, F., Delage, P.,& Cui, Y.. (2018). Experimental determination of the hydraulic characteristics of the substrate used for covering green roof. in 18. savetovanje SDHI & SDH, Niš, 25-26. oktobar 2018.
https://hdl.handle.net/21.15107/rcub_grafar_3372

Stanić F, Delage P, Cui Y. Experimental determination of the hydraulic characteristics of the substrate used for covering green roof. in 18. savetovanje SDHI & SDH, Niš, 25-26. oktobar 2018. 2018;.
https://hdl.handle.net/21.15107/rcub_grafar_3372 .

Stanić, Filip, Delage, Pierre, Cui, Yu-Jun, "Experimental determination of the hydraulic characteristics of the substrate used for covering green roof" in 18. savetovanje SDHI & SDH, Niš, 25-26. oktobar 2018 (2018),
https://hdl.handle.net/21.15107/rcub_grafar_3372 .