Reports on Environmental Physics
(Berichte zur Umweltphysik (Print), ISSN 1439-8222)
(Berichte zur Umweltphysik (Internet), ISSN 1439-8303)

Reports on Environmental Physics is a series published by Janicke Consulting. The reports of this series appear at irregular time intervals and are made available free of charge on this Internet page. All rights are reserved to the publisher.

bzu-011-01.pdf (3571 KB) (Reports on Environmental Physics, Number 11, Edition 1, November 2023)

Ulf Janicke: Effective conversion rates between NO and NO2. (Language: German)
Abstract: This report describes the derivation of effective conversion rates between NO and NO2 based on reaction mechanisms of the standard VDI 3783 Part 19 (2017) and their application in the program system LASREA (particle model LASAT in combination with higher order reactions). The effective conversion rates (and their inverse, the effective conversion times) can be used in conventional dispersion models such as LASAT or AUSTAL. Categorized conversion times were derived, which depend only on the background concentration, the atmospheric stability and the time of day. They can therefore be specified as time series without additional required parameters, for example within the framework of the regulation TA Luft (2021). Comparisons were made with the conversion times according to the standard VDI 3782 Part 1 (2016) and validations were carried out for a complex emission system. The developed methods and models can also be used for more special problems. The work was funded by the research project FKZ 3719 51 203 0.

bzu-010-02.pdf (207 KB) (Reports on Environmental Physics, Number 10, Edition 2, June 2019)

Ulf Janicke: Specification of the calculation of plume rise for stacks and cooling towers. (Language: German)
Abstract: This report contains a specification of the calculation of plume rise for stacks and cooling towers. The specification is based on the three-dimensional, integral plume rise model for dry and wet plumes PLURIS, on additional studies described in Report on Environmental Physics No. 9, and on conventions. It can be used for example in the context of dispersion calculations with a particle model according to the standard VDI 3945 Part 3 (2000).

bzu-009-01.pdf (15729 KB) (Reports on Environmental Physics, Number 9, Edition 1, April 2017)

Ulf Janicke, Lutz Janicke, Wolfgang Bächlin, Thomas Flassak, Wolfgang Theurer, Alfred Trukenmüller: Enhancement of selected methodical foundations for the calculation of stack height and dispersion according to TA Luft. (Language: German)
Abstract: This report quotes research that has been carried out 2015/2016 on behalf of the German Federal Environmental Agency (UBA) in the project Enhancement of selected methodical foundations for the calculation of stack height and dispersion according to TA Luft (FKZ 3714 43 204 00) by the companies Ingenieurbüro Janicke, Ingenieurbüro Lohmeyer and Ingenieurbüro Theurer. It contains (Section results of the supplementary research on the Wind tunnel determination of an equivalent block height for numerical microscale modelling by Ingenieurbüro Theurer on behalf of the federal states Baden-Württemberg, Bayern, Berlin, Hessen und Thüringen and a comparison (Section 2.5) of former and new stack heights carried out by Alfred Trukenmüller (UBA) in course of steering this research project.


Wolfgang Theurer: Wind tunnel determination of an equivalent block height for numerical microscale modelling. (Language: German)
Bericht_Ersatzquader_20180524.pdf (1546 KB)

Wolfgang Theurer:Treatment of near-roof sources in the numerical modelling. (Language: German)
Bericht_Dachnahe_Quellen_20180524.pdf (1617 KB)

bzu-008-02.pdf (343 KB) (Reports on Environmental Physics, Number 8, Edition 2, April 2017)

Ulf Janicke, Lutz Janicke: Accurate numerical solution and analytical approximation for the wind profile over flat terrain. (Language: English)
Abstract: An accurate numerical procedure for calculating the vertical profile of wind speed and wind direction over flat terrain for a given exchange coefficient profile is presented together with an analytical approximation. The profiles can be used in local wind or air quality studies over flat terrain. In contrast to simpler analytical profiles, the proposed profiles provide a consistent treatment of both wind speed and wind direction, as well close to the ground. In contrast to prognostic wind field models, the proposed methods demand considerably less computation power. However, they provide a smooth transition to the profiles resulting from prognostic wind field models in the limit of flat and homogeneous terrain.

bzu-007-01.pdf (2469 KB) (Reports on Environmental Physics, Number 7, Edition 1, February 2011)

Ulf Janicke, Lutz Janicke: Some aspects of the definition of meteorological boundary layer profiles and comparisons with measurements. (Language: German)
Abstract: Meteorological boundary layer profiles, like the current standard profiles of the dispersion models LASAT and AUSTAL2000, are compared with measurements. Several aspects are discussed relevant for the setup of standard profiles, for example in connection with guideline VDI 3783 Part 8. The measurements have been evaluated and prepared as data sets by the University of Hamburg (group of Prof. B. Brümmer; Dr. G. Peters, I. Lange). The data (Excel files and report) are provided on the website  (Download/Data sets). 

bzu-006-01.pdf (1021 KB) (Reports on Environmental Physics, Number 6, Edition 1, April 2008)

Ulf Janicke, Lutz Janicke: Auswaschen von SO2, NOX und Staub durch Regen: Modellparameter für Ausbreitungsmodelle nach VDI 3945 Blatt 3. (Language: German)
Abstract: In einem Lagrangeschen Ausbreitungsmodell nach Richtlinie VDI 3945 Blatt 3 wird der Bodeneintrag durch trockene und nasse Deposition mit Hilfe der Parameter Depositionsgeschwindigkeit und Auswaschrate beschrieben. In diesem Vorhaben werden Parameterwerte für SO2, NOX und Staub hergeleitet. Die Werte für trockene Deposition basieren auf der Richtlinie VDI 3782 Blatt 5. Zur Beschreibung des Auswaschens durch Regen wird eine Kombination aus Depositionsgeschwindigkeit und Auswaschrate verwendet, mit der die komplexen Effekte aus Absorption, Desorption und chemischer Umsetzung im Regentropfen näherungsweise berücksichtigt werden.

bzu-005-02.pdf (3799 KB) (Reports on Environmental Physics, Number 5, Edition 2, March 2007)

Lutz Janicke, Ulf Janicke: Die Entwicklung des Ausbreitungsmodells AUSTAL2000G. (Language: German)
Abstract: Die TA Luft regelt, wie die Ausbreitung von Schadstoffen in der Atmosphäre im Rahmen von Genehmigungsverfahren zu berechnen ist. Die Umsetzung dieser Vorschrift ist beispielhaft im Computerprogramm AUSTAL2000 (Version 1.1) erfolgt.Der Wunsch der Bundesländer, mit einem möglichst ähnlichen Modell auch die Geruchsausbreitung zu berechnen, führte zum Projekt AUSTAL2000G. In einer Reihe von Vorstudien und Teilprojekten wurde die Umsetzung realisiert, die zur Version 2.0 von AUSTAL2000 führte. Sie ist sowohl für TA Luft Anwendungen als auch für Geruchsausbreitungsfragen einsetzbar. Dieser Bericht faßt die im Laufe der Entwicklung erstellten Berichte der Teilvorhaben zusammen.

bzu-004-02.pdf (172 KB) (Reports on Environmental Physics, Number 4, Edition 2, March 2006)

Lutz Janicke: A note on the distribution function of density fluctuations in the model COFIN. (Language: English)
Abstract: In the model COFIN the density fluctuations in a plume are derived from LIDAR measurements. However, the distribution function given is neither normalized nor non-negative. It is shown how these deficiencies can be removed.

bzu-003-01.pdf (514 KB) (Reports on Environmental Physics, Number 3, Edition 1, November 2000)

Ulf Janicke: Auswaschen von NH3 durch Regen: Bestimmung einer effektiven Auswaschrate. (Language: German)
Abstract: Es wird das Auswaschen von atmosphärischem Ammoniak durch Regen untersucht, wobei die gleichzeitige Aufnahme von CO2 berücksichtigt wird. Es wird eine effektive Auswaschrate für NH3 hergeleitet, wobei davon ausgegangen wird, daß die Ammoniak-Wolke durch eine vertikal homogene Schicht beschrieben wird. Die Ergebnisse werden mit experimentellen Messungen verglichen. Als Anwendung wird der Masseneintrag in den Erdboden aufgrund nasser Deposition für eine konkrete Störfallsituation berechnet.

bzu-002-01.pdf (694 KB) (Reports on Environmental Physics, Number 2, Edition 1, October 2000)

Lutz Janicke, Ulf Janicke: Vorschlag eines meteorologischen Grenzschichtmodells für Lagrangesche Ausbreitungsmodelle. (Language: German)
Abstract: Auf der Basis einer ausführlichen Literaturrecherche wird ein meteorologisches Grenzschichtmodell bestimmt, welches im Rahmen von Ausbreitungsrechnungen mit Lagrange-Modellen verwendet werden kann. Das Modell wird anhand von Experimenten validiert.

bzu-001-01.pdf (461 KB) (Reports on Environmental Physics, Number 1, Edition 1, August 2000)

Lutz Janicke: A random walk model for turbulent diffusion. (Language: English)
Abstract: An algorithm of a random walk model is presented that is not restricted to time steps small with respect to the smallest Lagrangian correlation time. The correct relation for the drift velocity under these circumstances is derived. The increased value of the time step makes it possible in many cases to perform the dispersion calculation within a shorter time or with higher accuracy. In addition, an empirical expression for the drift velocity is given that is also valid for a spatially varying time step. The algorithm described is implemented in the Lagrangian dispersion model LASAT.