12 Lady Game Creek
Water Quality Ranking: 29 / 43
Data Reliability Ranking:
10 / 43Constituent Council(s):Ku-ring-gai Municipal Council
Constituent stream(s):Lady Game Creek
Rainfall Station(s):R09
Sewerage Overflows: 2
Stormwater outlets: 60
Water Quality sampling points: WQ015, WQ021
Pollution Control Device Numbers: none
Overview:
Landuse:
|
Landuse |
Area (ha) |
% sub-catchment |
% LCR catchment |
|
Open space |
62 |
25 |
3.1 |
|
Residential |
162 |
65 |
3.44 |
|
Business |
2 |
1 |
1.5 |
|
Industrial |
0 |
0 |
0 |
|
Special Uses |
22 |
9 |
2.6 |
|
Special Zones |
0 |
0 |
0 |
|
Total |
248 |
100 |
3.1 |
Period of sampling records: August 1989 - March 1998 % wet days: unknown
Number of sampling occasions (N):5
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 |
20 |
20 |
60 |
0 |
40 |
20 |
40 |
Summary: Water quality in this sub-catchment is very poor. Levels of all parameters suggest sewage pollution, high nutrient loadings and possible eutrophication.
Issues: Such high sewage pollution levels suggest extensive leaking and exfiltration from the sewerage system and suggest that the two existing overflows need to be upgraded or expanded if the overflow points are operating effectively. The capacity of the system to cope in wet weather has not been assessed since no wet weather monitoring has been conducted.
Knowledge Gaps: Greater information on the location of overflows, their nature and severity need to be gathered. Information regarding stormwater outlets is complete.
Recommendations: Comencement of a wet weather monitoring programme to assess the effectiveness of existing overflows. Audit of sewerage system to detect and rectify leaks.