أثر التقلبات المناخية على مباني التراث العمراني في محافظة ينبع

Abstract EN

The study aims to demonstrate the impact of climate fluctuations on urban heritage buildings in Yanbu Governorate, and evaluate how people in charge of these site perceive the risk imposed by such natural fluctuations on these heritage sites.

This evaluation will help to take proper measures to maintain and preserve these important sites from climatic vagaries.

To achieve the goals of the present investigation, two procedures were carried out: 1.

A field survey was conducted in which individuals in charge of the investigated sites were interviewed.

2.

Soil reports along with statistical analysis of climate elements that were collected during the period 1978 through 2015 was carried out.

A linear regression model was applied to identify general trends of temperature, rain, relative humidity, thunderstorms, sandstorms and wind speed.

Additionally, the dryness index, mold growth index, corrosion caused by rain and wind forces were also investigated.

Statistical analysis indicated that the maximum and minimum temperatures have increased by 2.7°C and 1.8°C, respectively, with the trend of being significant at the 99% level.

The significant temperature that has been increased along with the decline of precipitation caused a rise in the aridity index and the risk of weathering by the higher surface salinity due to the capillary action imposed by drier and warmer conditions.

The frequency of thunderstorms (rain) increased by 3.5 folds, and their annual capacity for erosion increased by 20.6.

The statistical analysis revealed a weak negative trend of wind speed and sandstorm frequency, with a probable value of 0.11 knots and 0.98 cases, respectively.

These values are not statistically significant, however, results indicate a reduction in wind force by 0.03 kg/m2.

Relative humidity dropped by 1.48%, which is statistically significant at the 95% level.