أنماط توزيع الأراضي في بالمنطقة المركزية لمدينة الرياض

الملخص EN

(1) The average annual drift ٠٢ dust and sand days is 105.5, and the average annual blowing days of dust and sand is 25.8.

The percentage of the wind speed frequency of less than 11 knots, and greater than ل ل knots is 71%, and 29% respectively.

(2) Results of the eorrelation coefficient equation indicate that the relationship between the value of monthly wind speed and air pressure, relative humidity, and temperature is very weak.

Also the relationship between the monthly drifting dust and sand days, and the monthly value of air pressure, relative humidity, and temperature is weak, but the relationship between the monthly value of drifting dust and sand days, and wind speed is verry high.

The relationship between the monthly blowing dust and sand days, and the monthly value of wind speed is high, but the relationship between the monthly blowing dust and sand days, and the monthly value of air pressure, relative humidity, and temperature is weak.