22 Tambourine Creek
Water Quality Ranking: 9 / 43
Data Reliability Ranking:
20 / 43Constituent Council(s):Lane Cove Council
Constituent stream(s):Tambourine Creek
Rainfall Station(s):R10
Sewerage Overflows: 1
Stormwater outlets: 19
Water Quality sampling points: WQ005
Pollution Control Device Numbers: D015
Overview:
Landuse:
|
Landuse |
Area (ha) |
% sub-catchment |
% LCR catchment |
|
Open space |
15 |
22 |
0.8 |
|
Residential |
47 |
70 |
1.0 |
|
Business |
2 |
3 |
1.5 |
|
Industrial |
0 |
0 |
0 |
|
Special Uses |
3.5 |
5 |
0.4 |
|
Special Zones |
0 |
0 |
0 |
|
Total |
68 |
100 |
0.8 |
Period of sampling records: June 1997 - June 1998 % wet days: 40
Number of sampling occasions (N):6
Compliance of key indicators to guidelines - % of time guidelines met under all conditions.
|
Parameter |
|||||||
|
pH |
Faecal Coliforms |
% Diss. Oxygen |
Diss. Solids |
Total P |
Total N |
Ammonia |
Chl. - A |
|
100 |
29 |
50 |
0 |
50 |
100 |
no test |
no test |
Summary: Water quality in this sub-catchment is moderate but there is no history of data to compare water quality to. Nutrient loads do not appear to be excessive even during wet periods when runoff carries alot of phosphorus and nitrogen is solution. This sub-catchment is effected by faecal contamination. Ammonia tests would provide further information.
Issues: The sewerage system seems to be unable to cope with overflows brought about by wet weather events. There is only one designed overflow for the sub-catchment but its activity has not been assessed.
Knowledge Gaps: Further information regarding the effectiveness of the sewerage system would be useful. On a catchment basis, some record of active overflows would be very useful.
Recommendations: Attempts should be made to identify where active overflows are. This comment can be applied to the entire Lane Cove catchment. If sewerage pollution is not derived from these overflows then details about the condition of the sewerage lines and exfiltration is required. The effectiveness of the sediment basin at Warraroon reserve should be assessed because dissolved solids measurement still exceed ANZECC guidelines.