ECs in the HYDROLOGY group
ECC_BOMBORA_REGION
ECC_BREAKER_REGION
ECC_CANAL
ECC_CANAL_NEXUS
ECC_CANAL_ROUTE
ECC_COVERED_WATERCOURSE
ECC_DEPTH_REGION
ECC_DISCOLOURED_WATER
ECC_DRY_LAKE
ECC_ESTUARY
ECC_FIORD
ECC_FLOOD_BASIN
ECC_FLUME
ECC_FORD
ECC_HARBOUR
ECC_HARBOUR_COMPLEX
ECC_HYDROGRAPHY
ECC_HYDROLOGIC_OBJECT
ECC_INLAND_WATER
ECC_INLAND_WATER_SURFACE
ECC_INLET
ECC_LAGOON
ECC_LAKE
ECC_LAKE_NEXUS
ECC_LAND_FLOODING_PERIODICALLY
ECC_MARINE_BAY
ECC_MARINE_CHANNEL
ECC_MARINE_FOUL_GROUND
ECC_MARINE_GULF
ECC_MARINE_PETROLEUM_FIELD
ECC_MARINE_REGION
ECC_MARINE_SOUND
ECC_MARINE_STRAIT
ECC_NAVIGABLE_WATERWAY
ECC_OCEAN
ECC_OPEN_WATER
ECC_OVERFALL_REGION
ECC_POLYNYA
ECC_PREVAILING_CURRENT
ECC_RAPID
ECC_RESERVOIR_NEXUS
ECC_RIP_CURRENT
ECC_RIVER
ECC_RIVER_NEXUS
ECC_RIVER_VANISHING_POINT
ECC_RUN_OFF
ECC_SEA
ECC_SECCHI_DISK
ECC_SPILLWAY
ECC_SPRING
ECC_SWAMP
ECC_SWEPT_REGION
ECC_TIDAL_BASIN
ECC_TIDAL_WATER
ECC_TIDE_RIP_REGION
ECC_TIDEWAY
ECC_UNDERGROUND_WATER
ECC_UNDERWATER_REGION
ECC_VEGETATED_SATURATED_LAND
ECC_VESSEL_STORAGE_ANCHORAGE
ECC_WADI
ECC_WADI_NEXUS
ECC_WATER_CHANNEL
ECC_WATER_CHANNEL_EDGE
ECC_WATER_CURRENT
ECC_WATER_GATHERING_REGION
ECC_WATERBODY
ECC_WATERBODY_BASIN
ECC_WATERBODY_CURRENT
ECC_WATERBODY_EDDY
ECC_WATERBODY_REGION
ECC_WATERBODY_SHELTER_BASIN
ECC_WATERCOURSE
ECC_WATERFALL
ECC_WATERING_HOLE