Plate 8 line graph showing variation in noise level Ijoka
The average noise level thematic maps and chart are shown in plate 5 to
plate 8 at the Ijoka residential area. Research reveals that the
residential land use noise peak at 57.5-59.1 dB(A) in the morning, 54.8
to 56.8 dB(A) at afternoon and 52.3-64.1 dB(A) in the evening while the
lowest noise value in the land use ranges between 40.2-42.4 dB(A),
39.4-41.2 dB(A), 38.2-40.0 dB(A) in the morning, afternoon and evening
respectively. It is observed that areas close to the road side
experience the highest noise level, this is as a result of traffic
noise. The noise levels in this area are not as high as the educational
and commercial area.
Plate 9 to plate 11 shows the spatial distribution of noise levels in
the selected areas within Oja Oba for morning, afternoon and evening
respectively. The colors denote the increase in noise levels(decibel)
which are represented from green to yellow on the thematic map. Plate 12
shows the line graph which denotes the noise peak and statistical
analysis of the noise data .
3.3 Detailed Noise Levels in Oja Oba(Commercial)