Tung Chung Stream (eastern tributary)
Tung Chung River is located at the western part of the Tung Chung New Town. It originates from the area near Tung Chung Au and flows northward into Tung Chung Bay. It is also an Ecologically Important Stream due to its high ecological value. To conserve the river habitat during the development of the new town extension, it is proposed that the channelized section of Tung Chung River together with the immediate upstream section up to Shek Mun Kap Road will be revitalised into a river park to promote water-friendly culture.
Tung Chung Stream (eastern tributary) Upstream
pH
If the result is under detection limit, it would be presented as detection limit in the charts.
Dissolved Oxygen - Saturation (% )
pH
5-day Biochemical Oxygen Demand (mg/L)
Ammonia as N(mg/L)
Dissolved Oxygen (DO) indicates the total amount of oxygen dissolved in the river channel water. DO supports aquatic fauna for respiration and maintenance of life. Dissolved Oxygen Saturation (DO (%)) falling in to 91 – 110% means excellent water quality with dissolved oxygen near or at saturation
Provides indication of anthropogenic pollutants. pH falling into 6.5–8.5 indicating that there is unpolluted surface water supporting most of the aquatic biota.
5-day Biochemical Oxygen Demand (BOD5) is the measure of the amount of dissolved oxygen consumed to break down organic material in five days by biological processes. High BOD5 level indicates water pollution. BOD5≤3 mg/L indicates excellent water quality
Ammonia-Nitrogen (NH3-N) Indicates the extent of organic contamination of the river channel. NH3-N < 0.5mg/L means that there is limited contamination by nutrient
