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What is CODASC?
CODASC stands for "COncentration DAta of Street Canyons". It is a data base containing concentration measurement data of street canyons with avenue-like tree planting.

What is the purpose of CODASC?
The purpose of CODASC is simply to make wind tunnel concentration data accessible for everybody interested.

For whom is CODASC of interest?
CODASC is addressing scientists working on urban air quality issues. It is of special interest for validation of numerical simulations or experimental investigations.

Where is CODASC from?
CODASC data is from the Laboratory of Building- and Environmental Aerodynamics at the Institute for Hydromechanics (IfH) at the University of Karlsruhe/Germany. The Laboratory of Building- and Environmental Aerodynamics runs a number of wind tunnels, among them are several atmospheric boundary layer wind tunnels.

Atmospheric boundary layer wind tunnel: wind tunnel boundary layer profile

W/H = 1 (aspect ratio: street width W to building height H)	α	TREE PLANTING	normalized concentration data c⁺ file name = [W/H]_[α]_[ρ_s]_[λ]_[wall]		concentration contour plot (300 dpi)
	90°	tree-free (wind perpendicular to street)	1_90_0,0_000_A.txt 1_90_0,0_000_B.txt	1_90_0,0_000_A.xls 1_90_0,0_000_B.xls	1_90_0,0_000.jpg
	45°	tree-free (wind inclined to street)	1_45_0,0_000_A.txt 1_45_0,0_000_B.txt	1_45_0,0_000_A.xls 1_45_0,0_000_B.xls	1_45_0,0_000.jpg
	0°	tree-free (wind parallel to street)	1_00_0,0_000_A.txt 1_00_0,0_000_B.txt	1_00_0,0_000_A.xls 1_00_0,0_000_B.xls	1_00_0,0_000.jpg
(read how to model trees)	90°	stand density dense (ρ_s = 1) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1) (read how to model trees)	1_90_1,0_080_A.txt 1_90_1,0_080_B.txt	1_90_1,0_080_A.xls 1_90_1,0_080_B.xls	1_90_1,0_080.jpg
	90°		1_90_1,0_200_A.txt 1_90_1,0_200_B.txt	1_90_1,0_200_A.xls 1_90_1,0_200_B.xls	1_90_1,0_200.jpg
	45°	stand density dense (ρ_s = 1) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	1_45_1,0_080_A.txt 1_45_1,0_080_B.txt	1_45_1,0_080_A.xls 1_45_1,0_080_B.xls	1_45_1,0_080.jpg
	45°		1_45_1,0_200_A.txt 1_45_1,0_200_B.txt	1_45_1,0_200_A.xls 1_45_1,0_200_B.xls	1_45_1,0_200.jpg
	0°	stand density dense (ρ_s = 1) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	1_00_1,0_080_A.txt 1_00_1,0_080_B.txt	1_00_1,0_080_A.xls 1_00_1,0_080_B.xls	1_00_1,0_080.jpg
	0°		1_00_1,0_200_A.txt 1_00_1,0_200_B.txt	1_00_1,0_200_A.xls 1_00_1,0_200_B.xls	1_00_1,0_200.jpg
	90°	stand density loose (ρ_s = 0.5) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	1_90_0,5_080_A.txt 1_90_0,5_080_B.txt	1_90_0,5_080_A.xls 1_90_0,5_080_B.xls	1_90_0,5_080.jpg
	90°		1_90_0,5_200_A.txt 1_90_0,5_200_B.txt	1_90_0,5_200_A.xls 1_90_0,5_200_B.xls	1_90_0,5_200.jpg
	45°	stand density loose (ρ_s = 0.5) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	1_45_0,5_080_A.txt 1_45_0,5_080_B.txt	1_45_0,5_080_A.xls 1_45_0,5_080_B.xls	1_45_0,5_080.jpg
	45°		1_45_0,5_200_A.txt 1_45_0,5_200_B.txt	1_45_0,5_200_A.xls 1_45_0,5_200_B.xls	1_45_0,5_200.jpg
	0°	tand density loose (ρ_s = 0.5) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	1_00_0,5_080_A.txt 1_00_0,5_080_B.txt	1_00_0,5_080_A.xls 1_00_0,5_080_B.xls	1_00_0,5_080.jpg
	0°		1_00_0,5_200_A.txt 1_00_0,5_200_B.txt	1_00_0,5_200_A.xls 1_00_0,5_200_B.xls	1_00_0,5_200.jpg
W/H = 2 (aspect ratio: street width W to building height H)	α	TREE PLANTING	normalized concentration data c⁺ file name = [W/H]_[α]_[ρ_s]_[λ]_[wall]		concentration contour plot (300 dpi)
	90°	tree-free (wind perpendicular to street)	2_90_0,0_000_A.txt 2_90_0,0_000_B.txt	2_90_0,0_000_A.xls 2_90_0,0_000_B.xls	2_90_0,0_000.jpg
	45°	tree-free (wind inclined to street)	2_45_0,0_000_A.txt 2_45_0,0_000_B.txt	2_45_0,0_000_A.xls 2_45_0,0_000_B.xls	2_45_0,0_000.jpg
	0°	tree-free (wind parallel to street)	2_00_0,0_000_A.txt 2_00_0,0_000_B.txt	2_00_0,0_000_A.xls 2_00_0,0_000_B.xls	2_00_0,0_000.jpg
	90°	stand density dense (ρ_s = 1) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	2_90_1,0_080_A.txt 2_90_1,0_080_B.txt	2_90_1,0_080_A.xls 2_90_1,0_080_B.xls	2_90_1,0_080.jpg
	90°		2_90_1,0_200_A.txt 2_90_1,0_200_B.txt	2_90_1,0_200_A.xls 2_90_1,0_200_B.xls	2_90_1,0_200.jpg
	45°	stand density dense (ρ_s = 1) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	2_45_1,0_080_A.txt 2_45_1,0_080_B.txt	2_45_1,0_080_A.xls 2_45_1,0_080_B.xls	2_45_1,0_080.jpg
	45°		2_45_1,0_200_A.txt 2_45_1,0_200_B.txt	2_45_1,0_200_A.xls 2_45_1,0_200_B.xls	2_45_1,0_200.jpg
	0°	stand density dense (ρ_s = 1) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	not measured	not measured
	0°		2_00_1,0_200_A.txt 2_00_1,0_200_B.txt	2_00_1,0_200_A.xls 2_00_1,0_200_B.xls	2_00_1,0_200.jpg
	90°	stand density loose (ρ_s = 0.5) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	2_90_0,5_080_A.txt 2_90_0,5_080_B.txt	2_90_0,5_080_A.xls 2_90_0,5_080_B.xls	2_90_0,5_080.jpg
	90°		2_90_0,5_200_A.txt 2_90_0,5_200_B.txt	2_90_0,5_200_A.xls 2_90_0,5_200_B.xls	2_90_0,5_200.jpg
	45°	stand density loose (ρ_s = 0.5) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	2_45_0,5_080_A.txt 2_45_0,5_080_B.txt	2_45_0,5_080_A.xls 2_45_0,5_080_B.xls	2_45_0,5_080.jpg
	45°		2_45_0,5_200_A.txt 2_45_0,5_200_B.txt	2_45_0,5_200_A.xls 2_45_0,5_200_B.xls	2_45_0,5_200.jpg
	0°	stand density loose (ρ_s = 0.5) crown porosity P_Vol = 97.5% (λ = 80m^-1) P_Vol = 96.0% (λ = 200m^-1)	not measured	not measured
	0°		2_00_0,5_200_A.txt 2_00_0,5_200_B.txt	2_00_0,5_200_A.xls 2_00_0,5_200_B.xls	2_00_0,5_200.jpg