This environmental research was conducted on the coastal water of Tartous city for the first time to complement previous studies along the Syrian coast. Sampling station were selected based on their different environmental characteristics from each o
thers on one hand, and their continuous exposure to the sources of pollution (oil, chemical, organic) on the other hand. It hasbeen implemented13sortiesfreelyduring the study period, which lasted fromSeptember2013untilSeptember2014. during which water samples were collected for analysis and determine the concentration of nutrients in, as vital samples to study and determine the types of phytoplankton, which collected, in addition to conducting field measurements of some properties Physical seawater (temperature, pH, salinity, oxygen dissolved concentration). This study has recorded 160 species of phytoplankton in study sites, distributed as follows: 91 species of Chryssophyta, 50 of Pyrrophyta, 11 of Chlorophyta, and 8 of Cyanophyta, their distribution has differed from one site to another and from month to monthaccordingto the differentiation in the environmental conditions.
The water quality in Al Thawra Lake was getting worst recently because of the
increscent of the concentration of nutrients, which reached the lake from point and
nonpoint sources. The Geographic Information System GIS was widely used in the last
d
ecades in evaluating quality of water depending on models operates within GIS one of
these models is The BASIN software (Best Assessment Science Integrating Point and
Nonpoint sources)which used in this research .The Pload model(Pollution load) which is
one of the BASIN models was used to estimate the pollution loads. The Pload was run by
using satellite image, Digital Elevation Model (DEM30), land use map, and export
coefficient values. The result showed that the total annual pollution loads of TP&TN are
TP=11543 kg/yr ,TN=61367 kg/yr that came out of the watershed of the lake, Open maki
and rock out crops are the dominate contributors to TP load in the watershed for about 30
%of total TP load, while Olives and citruses are the dominate contributor to TN load in the
watershed for about 33 %of total TN load, the model results also indicated that the
nonpoint sources are the main contributor to TP&TN loads in the watershed for about
80%of the total TP loads while only 20% from point sources, and for about 75%of the total
TN loads from nonpoint sources while only 25% from point sources.
To clarify the possibility of using bacterial flora as a pollution indicator,
water samples from river were collected and analyzed from July ١٩٩٩ to
February ٢٠٠١ for dissolved oxygen (DO), NO٣-N, NO٢-N, NH٤-N, PO٤-P,
suspended solids (SS), biolog
ical oxygen demand (BOD) Heterotrophic Bacteria
were identified to genus level, and another part of it was identified to
Enterobacteriaceae.
استمرت هذه الدراسة عامًا كاملا قمنا خلالها بإجراء بعض القياسات الفيزيائية الكيميائية
و البيوكيميائية للمياه بالإضافة إلى تعداد البكتيريا متباينة التغذية، الكوليفورم الكلية، الكوليفورم البرازية
(الايشرشيا كولي)، المكورات المعوية لموقعين على نهر الكبير الشمالي مع مصبه و بحيرة سد ١٦
تشرين.
Half quarterly water samples were collected during the period between March 2015
and February 2016 of four different stations from Banias city water that is subject to the
effect of sewage and estuaries. The concentrations of nutrients (H3SiO4
-,
PO4
-3, NO3
-, NO2
-
, NH4
+ ) and the concentrations of chlorophyll a were determined to find out how affected
by the temporal and spatial variability. The highest concentrations of phosphate and
ammonia ions were observed at station St3 (close to the sewage), while the highest
concentrations of nitrate ions were registered at the stations St1 and St2 (estuaries). The
results showed high values of chlorophyll a in April (due to spring bloom of
phytoplankton) and October (autumn bloom). The ions ratio ΣN/P revealed that
phosphorus ions are limiting factor of the phytoplankton growth at St1 and St2, and that
nitrogen ions are limiting factor of growth at the stations St3 and St4. The ratio Si/ΣN
revealed that silicate ions are limiting factor of the growth of diatoms in all the stations.
