дренаж означава в английски

catchment [catchments]▼(any structure or land feature which catches and holds water)
noun
[UK: ˈkæt.ʃmənt] [US: ˈkæt.ʃmənt]

swale [swales]▼(shallow (man-made) trough to allow water to infiltrate the soil)
noun
[UK: sweɪl] [US: sweɪl]