Influence of damming on the water body?
Influence of upstream dams
Flow regulation, temperature, sedimentation, reservoir flushing, and so on
Effects of hydropeaking; alteration of hydrograph
|No: No channelization, no alteration of the “natural” cross section (no “hard works” affecting the whole river), no flow velocity increase|
|Slight alteration: >10% of the segment affected by “hard works”, no flow velocity increase|
|Significant alteration: A main part of the segment is affected by “hard works”, flow velocity increase|
|Strong alteration: Straitened river, Technical-U-profile section, etc., flow velocity increase|
Effects of impoundments; water velocity decrease
|No: Sites not affected by water flow alteration|
|Slight: Sites slightly affected (<10% of the median annual flow and the median monthly flow during a critical period)|
|Significant: Sites significantly affected (>10% of median annual flow and median monthly flow during a critical period)|
|Strong: Sites strongly affected (>50% of median annual flow and median monthly flow during a critical period)|
|Riparian vegetation alteration||No||Slight||Strong||Complete|
|No: No direct alteration, i.e., adjacent natural vegetation appropriate to type and geography|
|Slight: Slight alteration|
|Strong: Strong alteration|
|Complete: Anthropogenic complete loss of riparian vegetation|
|Intensity of commercial traffic using large ships|
|PO4-P (mg/L)||Min: 0.002 Max: 0.490|
|NO3-N (mg/L)||Min: 0.05 Max: 4.88|
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