Acta Facultatis Ecologiae - Technická univerzita vo Zvolene

435001450400350hKz0,8h [m]3002502000,60,4Kz [m2/s]1501000,250001.09.0400:0002.09.0400:0003.09.0400:0004.09.0400:0005.09.0400:00t [dd.mm.yy hh.mm]06.09.0400:00007.09.0400:00Fig. 9 Comparison of EMH and eddy diffusion coefficient K z, counted using (8) within 1.–7. 9. 2004Finally, the relation (8) between EMH andeddy diffusion coefficient K is depicted in fig. 9.One must bear in mind that the validity of equationdh(8) is restricted only to situations when 0dt > .CONCLUSIONSTheoretical and experimental results regardingthe monitoring of 222 Rn activity concentration andnumerical computing of the equivalent mixingheight are presented in this paper. Mathematicalformalism linking together the EMH and eddy diffusioncoefficient based on numerical solution ofordinary differential equations has been developedand presented. Furthermore, there are also presentedstatistical summaries of the results for the year2004, leading to the conclusion that both EMH andK zhave diurnal and annual periodicity. The diurnalwaves are simple variations with maximum in theafternoon and minimum just before sunrise. Regardingannual wave besides the main variation withthe period of 1 year we must also take into accountthe second harmonic component with a period of 6months, which demonstrates itself mostly in winterseason.REFERENCES1. FONTAN, J. et al: Surveillance de la stabilité verticaledans un site urbain. In: Pollution atmospherique.1976, No. 71. p. 231–240.2. FONTAN, J. et al: Une methode de mesure de lastabilite verticale de l´atmosphere pres du sol. In:Boundary layer meteorology 17, Reidel PublishingCo., Dodrecht, Holland, 1979. p. 3–14.3. ŠIMON, J., HOLÝ, K., BULKO, M.: Determinationof equivalent mixing height using radon 222. In:Reiffers, M.: Proceedings of 15th conference of slovakphysicists. Košice: Východoslovenské tlačiarne,2007. ISBN 978-80-969124-4-5. p. 79–80.4. ŠIMON, J.: Určovanie ekvivalentnej zmiešavacejvýšky prostredníctvom objemovej aktivity 222 Rn vovonkajšej atmosfére: Rigorózna práca. FMFI UK,KJFB, Bratislava, 2004. 61 p.5. OBETKOVÁ, V., MARILLOVÁ, A., KOŠINÁ-ROVÁ, A.: Teoretická mechanika. 1. vyd. Bratislava:Alfa, 1990. 584 p.6. ZAUCKER, F. et al: Atmospheric 222 Rn MeasurementsDuring the 1993 NARE Intensive. In: Journalof Geophysical Research. 1996, Vol. 101, Issue D22,29. p. 149–164.7. Indoor Radon In Michigan – Residential SurveySummary Report: What is Radon? http://www.michigan.gov/deq/0,1607,7-135-3310_4105_4196-10461–,00.html (2006-03-03).8. BULKO, M.: Analýza variácií 222Rn v atmosféreBratislavy: Diplomová práca. Bratislava: FMFI UK,2004. 80 p.9. GARZON, L. et al.: The Universal Rn Wave. AnApproach. In: Health Physic. 1986, Vol. 51, No. 2,p. 185–195.