Experimental surface runoff hydrographs from linear impervious subcatchments for rainfalls of extremely high intensity.

This study focuses on lab-scale experimental runoff hydrographs from a linear completely impervious plane subcatchment. An improved method of surface runoff physical modelling was developed, allowing for expanded laboratory hydrograph simulations up to a linear scale of 10. Model rains of different intensities and durations were applied, and digital online data processing techniques were employed to ensure high time resolution and accurate flow rate determination.

Involvement of UV-C-induced genomic instability in stimulation рlant long-term protective reactions.

The study of the mechanisms affecting single stress factor impact on long-term metabolic rearrangements is necessary for understanding the principles of plant protective reactions. The objective of the study was to assess the involvement of UV-C-induced genomic instability in induction рlant long-term protective reactions. The study was carried out on two genotypes of chamomile, Perlyna Lisostepu (PL) variety and its mutant, using UV-C pre-sowing seed radiation exposure at dose levels 5-15 kJ/m.

Fall-winter sea surface temperature anomalies affect subsequent spring-summer phytoplankton succession and bioluminescence patterns in the Black Sea coastal waters near Crimea.

Seasonal and interannual dynamics of bioluminescence intensity and succession of the major phytoplankton taxonomic groups were analyzed using the six-year monitoring of Crimean coastal waters (the northern Black Sea) in 2009-2014. Monitoring program included regular CTD and bioluminescence intensity casts in the upper 60 m layer by means of "Salpa-M" sonde accompanied with phytoplankton sampling from subsurface (∼0.2 m) and from the layer of maximal bioluminescence intensity.

Optimization of the process of decreasing the filtration resistance of sewage sludge by thermal pretreatment: a case study for the Lviv WWTP.

The article presents the results of an experimental study of the effect of high-temperature thermal pretreatment on the specific resistance to filtration (SRF) of the sewage sludge (SS) from the Lviv wastewater treatment plant (WWTP), which is a combination of primary sludge and excess-activated sludge collected in primary sedimentation tanks. The kinetics of SRF reduction over time at temperatures of 140 - 150 °С are described by simple exponents, while at temperatures of 160 - 170 °С, they are described by modified two-parameter exponents. The study analyzed the dimensionless optimization function, which is the product of the final relative SRF of the sludge and the dimensionless time of thermal pretreatment.

Experimental hydraulic parameters of drainage grate inlets with a horizontal outflow in the broad-crested weir mode.

The accurate assessment of discharge coefficients for different types of water inlets is crucial for minimizing modelling errors in drainage systems thus reducing the risk of flooding in adjacent areas. This study experimentally investigated the hydraulic characteristics of gully grate inlets with water seal and horizontal outflow, with nominal outlet pipe diameters of 100 and 150 mm, using a laboratory setup that meets the requirements of a special European regulation. Transition depths from the weir to the orifice mode were determined, and it was found that the perforated grates significantly increased the hydraulic resistance compared to the bar grates, resulting in a corresponding decrease in the discharge capacity of gully inlets.