Description: Geomorphic stream condition at time of assessment. It indicates whether the physical form and function of the reach is appropriate and expected for the Style of river and the environmental/landscape setting in which it is found. Good condition reaches have the expected geomorphic character (physical form and features, including vegetation) and behaviour (response to disturbances and adjustments) for a particular River Style. Moderate condition reaches are noticeably impacted, typically through human disturbance. Poor condition reaches have accelerated degrading processes and lack geomorphic character expected of a reach.
RECOVERY_POTENTIAL
(
type: esriFieldTypeString, alias: Potential to recover from its current condition, length: 50
, Coded Values:
[Intact: Intact]
, [High: High recovery potential]
, [Moderate: Moderate recovery potential]
, ...2 more...
)
PRIORITISATION_GROUP
(
type: esriFieldTypeString, alias: Priority for river management, length: 50
, Coded Values:
[Conservation: Conservation]
, [Strategic: Strategic]
, [High: High priority rehabilitation]
, ...2 more...
)
PRIORITISATION_SUBGROUP
(
type: esriFieldTypeString, alias: Priority for river management (Sub group), length: 50
, Coded Values:
[S1: Strategic Type 1 - Poor condition undergoing active adjustment and threatening conservation or high recovery potential reaches]
, [S2: Strategic Type 2 - Moderate condition with high fragility linking conservation reaches]
, [S3: Strategic Type 3 - Moderate condition and linking or threatening conservation or high recovery reaches]
, ...4 more...
)
THREAT_INTERNAL
(
type: esriFieldTypeString, alias: Internal threat to geomorphic condition, length: 200
, Coded Values:
[Channel bed incision - upstream migration: Active migration of headcut upstream]
, [Channel bed incision - local: Bed incision leading to loss in in-channel features]
, [Sediment size change: Change of sediment clast size (D50, D84)]
, ...14 more...
)
SEDIMENT_YIELD
(
type: esriFieldTypeString, alias: Sediment yield (relative to an intact reach), length: 50
, Coded Values:
[Sink - High: Sediment sink - higher than expected volume]
, [Sink - Low: Sediment sink - lower than expected volume]
, [Sink - Neutral: Sediment sink - similar volume to reference reach]
, ...6 more...
)
HISTORICAL_CONTEXT
(
type: esriFieldTypeString, alias: Historical or evolutionary context of the reach, length: 255
, Coded Values:
[Artificially channelised: Artificial channel cut into accumulated valley-fill or floodplain sediments]
, [Bank Confined: These rivers flow through ancient alluvium and have limited capacity to adjust in vertical or lateral dimensions]
, [Channelised fill: Incision of a valley-fill reach due to post-European landuse changes]
, ...13 more...
)