undulating land definition
undulating land means land where slopes vary between 3–10 degrees; and
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- Undulating land
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Drainage area means a geographic area within which stormwater, sediments, or dissolved materials drain to a particular receiving waterbody or to a particular point along a receiving waterbody.
Excavate or "excavation" means ditching, dredging, or mechanized removal of earth, soil or rock.
Drainage means the removal of surface water or groundwater
Groundwater means all water, which is below the surface of the ground in the saturation zone and in direct contact with the ground or subsoil.
Mine drainage means any drainage, and any water pumped or siphoned, from an active mining area or a post-mining area. The abbreviation “ml/l” means milliliters per liter.