The two catchments are located south of Longyearbyen, the main town in Svalbard.
In Norwegian 'dryad' is a wood nymph and 'breen' is a glacier. No wood nymphs have been spotted so far though!
In Norwegian 'dal' is a valley and the name means 'valley of passage' as in winter it is a popular route from Adventfjorden (Longyearbyen) to Svea where there is coal mining.