31 Terrys Creek - Lower
Water Quality Ranking: 10 / 43
Data Reliability Ranking:
6 / 43Constituent Council(s):Ryde City Council
Constituent stream(s):Terrys Creek
Rainfall Station(s):R02
Sewerage Overflows: 10
Stormwater outlets: 39
Water Quality sampling points: WQ029, WQ030, WQ050 - 52, WQ063, WQ065
Pollution Control Device Numbers: none
Overview:
Landuse:
|
Landuse |
Area (ha) |
% sub-catchment |
% LCR catchment |
|
Open space |
82 |
13 |
4.2 |
|
Residential |
472 |
77 |
10.0 |
|
Business |
3 |
0 |
2.3 |
|
Industrial |
0 |
0 |
0 |
|
Special Uses |
34 |
6 |
4.0 |
|
Special Zones |
19 |
3 |
8.8 |
|
Total |
610 |
100 |
7.6 |
Period of sampling records: August 1989 - March 1998 % wet days: 44.4
Number of sampling occasions (N):17
Compliance of key indicators to ANZECC guidelines
|
Parameter |
|||||||
|
pH |
Faecal Coliforms |
% Diss. Oxygen |
Diss. Solids |
Total P |
Total N |
Ammonia |
Chl. - A |
|
83 |
17 |
17 |
75 |
25 |
58 |
57 |
no test |
Summary: Water quality in this sub-catchment is moderate. Indicators suggest sewage pollution and nutrient loadings combined with low flow or stagnant water.
Issues: This sub-catchment is largely residential. Undersized or failing sewerage systems may lead to further sewage pollution especially in wet weather.
Knowledge Gaps: Sewerage, stormwater and water quality information is adequate.
Recommendations: Continual assessment of water quality and the condition of the sewerage system is recommended.