01.CondAmb [020-031] [INGLÃ¦S] - CÃ¢mara Municipal do Porto

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MSUQL. ENVIRONMENTAL CONDITIONS.AVERAGE HOURS OF SUNLIGHT PER DAYSOURCE: INSTITUTO GEOFÍSICO(no. of hours)1614121086420Jan.2001Feb.2001Mar.2001Apr.2001May2001Jun.2001Jul.2001Aug.2001Sep.2001Oct.2001Nov.2001Dec.2001Jan.2002Feb.2002Mar.2002Apr.2002May.2002Jun.2002Jul.2002Aug.2002Sep.2002Oct.2002Nov.2002Dec.2002AVERAGE HOURS OF ACTUAL SUNLIGHT PER DAYAVERAGE HOURS OF POTENCIAL SUNLIGHT PER DAYContrary to the effects of rainfall, a high average of hours of sunlight has a positive impact on the quality oflife of a city and of its citizens, since it allows for a vast choice of outdoor activities, thus contributing to thepsychological welfare of people.When analysing the average hours of sunlight recorded in each month in 2001 and 2002, we find that thehigher values occur, as expected, in the spring and in the summer. In the analysed series, the maximum valueswere recorded in June 2001 (10.36h) and July 2002 (10.12h). These values are much higher than the annualaverage, which was 6.8h in 2001 and 6.5h in 2002.Notwithstanding, and having the relative insolation as reference, that is, the relation between the numberof hours of actual insolation and the average number of hours of sunlight possible, we notice that the city ofPorto had an annual average of about 50%, a reality that is in alignment with the occurrence of a considerablenumber of days of rainfall.Urban Audit I comparative data:Average hours of sunlight per day– 1996Average: 5.4Minimum: 3.7 (Cork)Maximum: 7.9 (Seville)Porto: 6.6Number of city cases: 50The calculation of the indicatoris based on the insolationrecords, that is, the minutes ofdirect exposure to the sun arecounted and the daily average isthus calculated.25
NoiseMSUQL. ENVIRONMENTAL CONDITIONS.SELECTED INDICATORS• Noise exposureINTERPRETATION OF THE SUBJECTIssues concerning environmental noise, mainly in urban centres, havebeen increasingly regarded as extremely important by local agents, sincethe people’s growing exposure to high noise levels contribute negatively totheir Quality of Life, and may even become a public health hazard.At the present time, there isinsufficient basic information, asituation that will be solved soonsince the Porto City Council hasstart measuring noise levels toproduce a Noise Map.Noise exposure is a key indicator to evaluate the Quality of Life of acity, since it shows the percentage of the population that is affected by certain noise levels.The main noise sources in urban centres are road, rail and air traffic and industry.In the case of Porto, road traffic is extremely important not only due to its great density but also to theexistence of great roads within the city, which gives rise to high speeds and high volumes of traffic.Consequently, it is imperative to try to measure not only the noise levels in the main streets of the city butalso to quantify the resident population who is exposed to these levels of noise, as a way of establishingintervention strategies to improve the Quality of Life of citizens.26
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01.CondAmb [020-031] [INGLÃ¦S] - CÃ¢mara Municipal do Porto

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