The use of simple hydrological models to assess outflow of two green roofs systems

https://doi.org/10.17221/138/2018-SWRCitation:Skala V., Dohnal M., Votrubová J., Jelínková V. (2019): The use of simple hydrological models to assess outflow of two green roofs systems. Soil & Water Res., 14: 94-103.
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Hydrological response of anthropogenic soil systems, including green roofs, has crucial importance in many fields of water engineering and management. As a consequence, there is an increasing need for modelling of the anthropogenic soil systems behaviour. To obtain empirical data, two green roof test beds were established on a green roof of University Centre for Energy Efficient Buildings, Czech Technical University in Prague. Each test bed is 1 m2 in area and is instrumented for the runoff monitoring. One test bed was filled with less permeable local soil, the other with highly permeable commercial soil substrate, both were planted with stonecrops. Two simple deterministic lumped models – a nonlinear reservoir model and a linear reservoir cascade model – were used to assess the hydrological response of these green roof systems. The nonlinear reservoir model seems more appropriate for extensive green roof systems than the linear reservoir cascade model because of better description of rapid system reaction typical for thin soil systems. Linear reservoir cascade model frequently failed to mimic internal variability of observed hydrographs. In systems with high potential retention (represented by the test bed with local soil), episodically applied models that consider the same initial retention capacity for all episodes do not allow plausible evaluation of the actual episode-related retention. In such case, simulation model accounting for evapotranspiration between the rainfall events is needed.

 

References:
Brunetti Giuseppe, Porti Michele, Piro Patrizia (2018): Multi-level numerical and statistical analysis of the hygrothermal behavior of a non-vegetated green roof in a mediterranean climate. Applied Energy, 221, 204-219  https://doi.org/10.1016/j.apenergy.2018.03.190
 
De-Ville Simon, Menon Manoj, Jia Xiaodong, Stovin Virginia (2018): A Longitudinal Microcosm Study on the Effects of Ageing on Potential Green Roof Hydrological Performance. Water, 10, 784-  https://doi.org/10.3390/w10060784
 
Fylstra Daniel, Lasdon Leon, Watson John, Waren Allan (1998): Design and Use of the Microsoft Excel Solver. Interfaces, 28, 29-55  https://doi.org/10.1287/inte.28.5.29
 
Jelínková V., Dohnal M., Picek T. (2016): A green roof segment for monitoring the hydrological and thermal behaviour of anthropogenic soil systems. Soil and Water Research, 10, 262-270  https://doi.org/10.17221/17/2015-SWR
 
Jelinkova Vladimira, Dohnal Michal, Sacha Jan (2016): Thermal and water regime studied in a thin soil layer of green roof systems at early stage of pedogenesis. Journal of Soils and Sediments, 16, 2568-2579  https://doi.org/10.1007/s11368-016-1457-7
 
Kasmin H., Stovin V. R., Hathway E. A. (2010): Towards a generic rainfall-runoff model for green roofs. Water Science and Technology, 62, 898-905  https://doi.org/10.2166/wst.2010.352
 
Kodešová Radka, Fér Miroslav, Klement Aleš, Nikodem Antonín, Teplá Daniela, Neuberger Pavel, Bureš Petr (2014): Impact of various surface covers on water and thermal regime of Technosol. Journal of Hydrology, 519, 2272-2288  https://doi.org/10.1016/j.jhydrol.2014.10.035
 
Krebs Gerald, Kuoppamäki Kirsi, Kokkonen Teemu, Koivusalo Harri (2016): Simulation of green roof test bed runoff. Hydrological Processes, 30, 250-262  https://doi.org/10.1002/hyp.10605
 
Locatelli Luca, Mark Ole, Mikkelsen Peter Steen, Arnbjerg-Nielsen Karsten, Bergen Jensen Marina, Binning Philip John (2014): Modelling of green roof hydrological performance for urban drainage applications. Journal of Hydrology, 519, 3237-3248  https://doi.org/10.1016/j.jhydrol.2014.10.030
 
Nash J.E. (1957): The form of the instantaneous unit hydrograph. International Association of Hydrological Sciences General Assembly, 1957: 114–121.
 
Nash J.E., Sutcliffe J.V. (1970): River flow forecasting through conceptual models part I — A discussion of principles. Journal of Hydrology, 10, 282-290  https://doi.org/10.1016/0022-1694(70)90255-6
 
Němec J. (1965): Hydrology. Prague, State Publishing House of Technical Literature. (in Czech)
 
Palla A., Gnecco I., Lanza L. G. (2012): Compared performance of a conceptual and a mechanistic hydrologic models of a green roof. Hydrological Processes, 26, 73-84  https://doi.org/10.1002/hyp.8112
 
Piro Patrizia, Porti Michele, Veltri Simone, Lupo Emanuela, Moroni Monica (2017): Hyperspectral Monitoring of Green Roof Vegetation Health State in Sub-Mediterranean Climate: Preliminary Results. Sensors, 17, 662-  https://doi.org/10.3390/s17040662
 
Skala V. (2018): Modeling of runoff from green roof test beds. [Diploma Thesis.] Prague, Czech Technical University in Prague. (in Czech)
 
Stovin Virginia, Vesuviano Gianni, Kasmin Hartini (2012): The hydrological performance of a green roof test bed under UK climatic conditions. Journal of Hydrology, 414-415, 148-161  https://doi.org/10.1016/j.jhydrol.2011.10.022
 
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