multidisciplinary oil spill modeling to protect coastal communities and the environment of the eastern mediterranean sea - oil spill containment

by:Demi     2019-09-12
multidisciplinary oil spill modeling to protect coastal communities and the environment of the eastern mediterranean sea  -  oil spill containment
We propose new mathematical and geological models to help civil protection authorities mitigate potential oil spills in Eastern Mediterranean.
Based on new high-resolution water depth, meteorological, marine and landform data, oil leakage simulations were performed on 19 existing offshore wells.
These simulations show that the oil spill moves into the east and northeast of the levanine basin, affecting coastal areas in Israel, Lebanon and Syria.
Under the action of wind, water flow and waves, the oil slick will reach the coast within 1 to 20 days.
By applying qualitative analysis, the seabed morphology is first associated with the direction of the oil slick expansion, because it can change the movement of the water flow.
Specifically, in most of the cases studied, the direction of the oil leakage spindle is directed according to the general orientation of the water depth feature.
This work suggests that within hours of the oil spill in the eastern Mediterranean, the spill should be mitigated before the wind and water flow disperse.
We explained that in order to reduce any oil spill, agreements should be given priority among neighbors.
The methodology used in this work was developed within the framework of the European Commission's project on oil spill response and forecast (, , , ; ).
In the first phase, water depth, landform, meteorological and marine parameters are considered to be the main factor in controlling the spread of floating oil in the eastern Mediterranean-19.
High Spatial-temporal resolution data using MEDSLIK wind, wave, sea surface temperature and 3D sea-
Current conditions provided by CYCOFOS reduced from Copernicus
Marine Environmental Monitoring Services (CMEMS)marine service.
Spatial and temporal resolution of weather-
At present, the marine data used in MEDSLIK oil spill simulation is 3 times per hour, 1 time.
8 kilometers of ocean current resolution;
3 kilometers per hour, 5 kilometers of wind and waves resolution.
An oil fate model was also generated to estimate the percentage of oil that evaporated, dispersed and stranded on the eastern Mediterranean coast.
Volume of medium-55,800 BOMs
According to the request of the Mediterranean regional marine pollution emergency center, the grade Belayim oil was selected for the model (REMPEC)
Following the MEDEXPOL 2013 workshop.
The Belayim mixture is produced in Suise Bay and consists of medium crude oil with a specific gravity of 26 ° API.
Specifically, the basic steps of the method applied are: Step 1.
Water depth features are known to change the ocean circulation.
For this, we calculated the slope ()and aspects ()
Water depth data provided by EMODNET.
In our calculation of the slope,)=u2009tan(|()|)
, Corresponding to the slope of the p point of the terrain surface Z, and ()
Represents a plane tangent vector defined.
The slope is measured in degrees ()[0, 90°].
In addition, it corresponds to the aspect of the p point of the terrain surface Z.
Measurement in degrees ()[0, 360°].
The above calculation is carried out using Matlab.
The slope and aspects of the calculation have been exported. shp (shape)
Format for further processing in ArcGIS 10. Step 2.
Taking into account the results obtained in step 1 (
See, columns 4, 5, 6)
And the geographical distribution of spills (and )
We defined seven. 7)sub-
Regions with different morphological features (). Step 3.
In step 3, we chose the maximum trajectory (
Maximum area covered)of the spills (and )
A database was created in ArcGIS 10, including water depth, slope, aspect, and overflow tracks. Step 4.
Finally, we conducted a qualitative evaluation of the relationship between the oil spill trajectory and the seabed morphology (see )
And assess the susceptibility of coastline (and )
Around the Levant Basin
The method used is summarized and used.
As an example of our approach, we consider the oil leakage at Site 01 off the coast of northern Egypt, such (
White circle represented by number 1).
In this area, the existing slope of the water depth ()are 0°–10° (i. e.
Almost flat sea floor)
The water depth feature is generally tilted North (
0 °-25 ° (N-NNE)and 345°–359° (NNW-N)in area 3, ).
In addition, the main direction of the water depth feature in the region relative to the north is the electronW (
Almost perpendicular to the aspect)
And consistent with the main shaft to expand the oil leakage (
Check the track of oil leakage on site 01).
Finally, according to Site 01 ()
Two years ago (2)
A few days after the leak, the oil slick is expected to remain on the surface and evaporate.
The spread of the oil spill showed a very low value of about 1%.
The oil slick stays on the surface until the fourth day, and continued evaporation and expansion to the coast will also occur over the next few days.
The sensitivity of the coastline in this area is very high (ESI 9, ).
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