French to English Other

Can the above be translated as "southern basin" in the following context?

"Les fumées des usines stagnent dans la plaine campanienne autour du Vésuve, surtout dans la cuvette méridionale, fermée par le Vésuve lui-même, les contreforts des Appenins et les monts Lattari, et au milieu de laquelle se trouve Pompéi"

I have translated this sentence as:

"The factory fumes stagnate in over the Campanian plain around Vesuvius, particularly over the southern basin, which is enclosed by Vesuvius itself, the foothills of the Apennines and the Lattari mountains. In the middle of all this lies Pompeii".

Any suggestions/corrections welcome.