а в некоторых случаях необходимость

а в некоторых случаях необходимость осуществления водоотлива или водопонижения, а также устройства искусственного основания (особенно при авариях)

Results (English) 1:

and in some cases the need for drainage or dewatering, and the devices of artificial base (especially in case of accidents)

Results (English) 2:

and, in some cases, the need for pumping or dewatering facilities, as well as a device of artificial reason (especially in crashes)

Results (English) 3:

And, in some cases, the need for the implementation of the drainage from or drilling rig complex, as well as devices artificial base (especially in the event of an accident.