3 Lane Cove River 1
Water Quality Ranking: 7/ 43
Data Reliability Ranking:
19 / 43Constituent Council(s):Ku-ring-gai Municipal Council
Constituent stream(s):Lane Cove River
Rainfall Station(s):R06
Sewerage Overflows: 6
Stormwater outlets: 11
Water Quality sampling points: WQ036, WQ058, WQ059
Pollution Control Device Numbers: none
Overview:
Landuse:
|
Landuse |
Area (ha) |
% sub-catchment |
% LCR catchment |
|
Open space |
51 |
62 |
2.6 |
|
Residential |
30 |
37 |
0.6 |
|
Business |
0.3 |
0 |
0.23 |
|
Industrial |
0 |
0 |
0 |
|
Special Uses |
0 |
0 |
0 |
|
Special Zones |
0.5 |
1 |
0.23 |
|
Total |
82 |
100 |
1.0 |
Period of sampling records: August 1989 - March 1998 % wet days: unknown
Number of sampling occasions (N):7
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 |
|
80 |
60 |
60 |
100 |
20 |
60 |
25 |
0 |
Summary: Water quality in this sub-catchment is fair. Low turbidity and faecal coliform readings indicate that pollution from overflows and sedimentation is minimal. The sub-catchment is small and is largely open space, much of which is reserve or national park. Levels of phosphorus and nitrogen are frequently above the guidelines and may be derived in part from Christie playing fields.
Issues: Pollution from phosphorus appears to be an important issue.
Knowledge Gaps: Information on water quality in this catchment is largely complete.
Recommendations: Some investigation into the specific sources of nitrogenous waste.