|The industrial city located in northern east of Damascus city in
southern region of Syrian Arab country . where the semi- continental
climate prevails distinguished with cold, rainy winter and hot, dry
summer in addition to ,tow transitory moderate seasons (spring & fall) .
This country region is exposed to many variation in atmosphere pressure
stared from low pressures spread over the Mediterranean sea which from
over it between (October and April) bring to the region changeable air-
mass burdened with moisture so rain and snow fall over heights.
-In addition to the cold Siberian air- mass with its northern and
northern east cold dry wind resuming days and weeks occasionally during
winter. In spring and fall the climate becomes moderate, the region
affected by khamasin which formed in spring over the north of Africa
near Mediterranean coasts or in the middle of Arabian peninsula these
low air mass hold hot air – mass- sands and dust(rain may fall
-The low air – mass ceased in spring according to azury high air – mass
progress toward north.
-Summer of the region characterized with dry and hot temperature, the
wind is western with occasionally fast speed.
In the following :the climatic characteristic according to dumma
climatic station records, related primary to meteorology est.
|1.The climatic environment:
|Damascus region in which the industrial city located ,classified
within the dry region that dominated Syrian Arab republic expanded from
north till south, in addition to some northern east regions of the
|The continental climate expresses the ranges between the minimum and
maximum temperatures in the region, it reaches(100)% in the desert
regions and (0)% in the coastal regions.
The studied continental climate reaches the rate about 40% and it may
reaches 45% sometimes, according to what mentioned in Syrian climatic
|the temperature degrees decrease when going up over the sea level ,
and from summer to winter months. Temperature average reaches
(12.3)0c,but the maximum monthly average of temperature degree reaches
(23.7)0c and the absolute maximum temperature degree reaches (41.7)0c in
august, as for the minimum temperature degree reaches (8) and the
absolute minimum one reaches(-9)0c in December.
|The rain full average according to dumma climatic station
reaches(198.2)mm , rain full time stare generally on October and
gradually increased till reach the top in winter months when the rain
fall reaches (41)mm on October then gradually decrease until almost
finished in summer.
|it is related to water steam amount ,temperature degree , height
over sea level , density and spread of plants.
The average of relativity moisture reaches (61.2)%, it decreases on June
to (44.7)% while increases on December and January to reach (77)%.
|the value of probable vaporization reflects the relationship
between heat and water vapor according to their sources and local
factors affection. The daily average of vaporization according to dumma
station records reaches (3.7)mm and increasing on summer till(6.4)mm on
July ,and decreasing till (1.2)mm on December and January.
|7.the prevailing wind:
|western and southern west wind are prevailing in adra industrial
city, eastern and northern east wind blowing less than the first
specially in fall and winter ,reaching(30-25)m/s in speed.
|8.special meteoric phenomena:
|climatic influences on the industrial city are weak , the yearly
average of frost days is /92/ days per year , and the yearly average of
fog days is /10/ days per year, and the yearly average of sandstorm is
/5/ days per year, but the cold does not influence the area.
|The hydrologic characteristics:
|The site of the industrial city near the mountain chain of about
Aata on the southern east foot to this chine make it exposed to
dangerous floods consequent to water flow in streams formed by rain
fall on the chain.
|Counting rain characteristics depended on Damascus station data
according to absence of main station in the regions, and similarity of
sea level in the tow regions.
Damascus –mazzah station affected by the values of maximum rainfall
during different periods (15-30-60-360-720)minutes during year months.
At the time when the ordinary year start in January and end in December
adopted by the general directorate of meteorology measures were changed
to hydrologic year start in September and end in august.