Table 7.6b Overall Impact Evaluation to Tai Tei Tong River.

Evaluation Criteria	Tai Tei Tong River
Habitat quality	Moderate
Species	Potential disturbance and temporary habitat loss for avifauna species of conservation interest, (Little Egret, Egretta garzetta; Chinese Pond Heron, Ardeola bacchus; Striated Heron, Butorides striatus). Potential direct impact, disturbance and temporary habitat loss for fish species of conservation interest (Predaceous Chub, Parazacco spilurus)
Size/Abundance	Three small sections of the river totaling approximately 160m in length would be directly affected
Duration	Direct impacts would last for the duration of the construction phase, and a period of re-colonisation during the operation phase. Periodic minor disturbance throughout the operation phase due to routine maintenance (e.g., de-silting works).
Reversibility	Direct impacts to stream/river habitats would be reversible; the newly constructed drainage channels are expected to provide suitable habitats for aquatic communities previously recorded from the stream/river. Periodic minor increase in disturbance during operational phase would be temporary and reversible.
Magnitude	The scale of the impacts is considered minor.
Overall impact conclusion	Construction Phase: Minor. Operation Phase: Minor.