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Class

Specification

1

nearly
natural

• Floodplains not or to a very small degree disconnected from floods by river regulation and/or flood protection measures
• Rivers only slightly regulated, with high flooding possibility
• Mainly no or very low intensity land use, mostly forest, wetlands, and rarely grassland

2

slightly
modified

• Floodplains to a small degree disconnected from floods by river development and/or flood protection measures
• Rivers variably regulated, but usually with high flooding possibility
• Mainly low intensity land use, mostly forest, wetlands and grassland

3

moderately modified

• Floodplains partly disconnected from floods by river development and/or flood protection measures
• Rivers generally regulated, but usually with flooding possibility
• Variable intensity of land use

4

severely modified

• Floodplains widely disconnected from floods by river development and/or flood protection measures
• Rivers generally regulated, partly dammed
• High intensity land use, mainly intensive agriculture and urban areas

5

totally
modified

• Floodplains completely disconnected from floods by river development and/or flood protection measures
• Rivers generally regulated heavily, frequently dammed
• High intensity land use, mostly with high percentage of urban areas