Abstract
This study aims to validate CO dispersion model due to the position of the road toward the dominant wind direction on the transport sector. Sampling for modelling was done on the road with the road angle to wind direction is 0 degree (Jend. A. Yani Road), 30 degree (Andalas Road) and 60 degree (Prof. Dr. Hamka Road). CO dispersion model was obtained from the relations between CO concentration with traffic volume, traffic speed, wind speed and dominant wind direction. Sampling for validation was done at three location points, i.e. Jend. Ahmad Yani Road, By Pass Road and Dr. Wahidin Road, each of which has a position of 0, 45 and 90 degrees toward dominant wind direction. Sampling for CO was done using impinger. Measurement of traffic characteristics and meteorological conditions was performed in conjunction with CO sampling. Validation test was done by using Pearson Product Moment formula and Test of Two Variance. Results of the Two-Variance Test showed no significant difference between two concentrations of CO model and CO measurement. It showed the Test Ratio (RUf) smaller than the Critical Point. Validation test using Pearson Product Moment showed that the CO model can be used for predicting CO dispersion.
Highlights
Air pollution is one of a set problems in the urban area
From the test results of two variances obtained RUf value of 0.480. This value is smaller than the critical point limit value (RUf < 2.102), this means that there is no significant difference between the Carbon Monoxide (CO) model concentration and the CO concentration of validation
The Test Ratio (RUf) value of the CO model has a value smaller than the critical point value. This shows no significant difference between the concentration of model and the concentration of the validation data
Summary
Air pollution is one of a set problems in the urban area. Some of them caused by transportation [1]. [3] evaluated the impact of transportation on air quality on the roadside. Study of Carbon Monoxide (CO) concentrations have been done on the roadside area (for example, [4,5,6]). Some study of CO concentration on the roadside in Padang City were conducted [7]. [8] monitored the influence of the dominant wind direction on CO dispersion on roadside area in Padang City. In this study, modelling of set of data from [8] were developed to get CO concentrations model based on wind coming angle direction on the roadside and validated the model. This research aims to model and validate the effect of wind angle to the road, toward CO concentration in the roadside area. The wind angle to the road (hereinafter called α) used in this research are 0o, 30o, and 60o for modelling, 0o, 45o, and 90o for validating
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