Brisbane Water Plan of Management - Gosford City Council - NSW ...
Brisbane Water Plan of Management - Gosford City Council - NSW ... Brisbane Water Plan of Management - Gosford City Council - NSW ...
6.0 WATER DEPTH AND SEDIMENTATION Rates of sedimentation within Brisbane Water and local water depths were analysed as part of this plan by the Coast and Estuaries Directorate of the Department of Land and Water Conservation by comparing hydrographic data between 1901 and 1992. The study area covered the main waterways of Brisbane Water except the Woy Woy Bay or Bays area and Phegans Bay because they were isolated from the main water body by a rail line causeway. Table 4 and Figures 20 to 22 outline the geological elements and cross-section data of Brisbane Water which indicated the general direction of the vertical change as erosion, accretion, or in some cases both processes occurring. Taking into account the results of the hydrographic analysis it appears that there is recent sedimentation occurring at the outlets of drains and creek systems entering Brisbane Water, however no identifiable trends suggest that Brisbane Water is steadily accreting material or being eroded to any degree of concern. On the whole, the extent of the estuary appears to be stable. The plan recognises the need to minimise any further erosion within the catchment of Brisbane Water and sedimentation within and around Brisbane Water itself. Accordingly, monitoring of creek and major drainage outlets is considered warranted to investigate sediment and nutrient control methods by Council to reduce and prevent any degradation occurring to the waterway. 6.1 Management Objectives Water Depth and Sedimentation MANAGEMENT OBJECTIVES PRIORITY FOR ACTION RESPONSIBILITY a Determine siltation rates by checking general water depths with historic chart information. H Council, LAWC (C&E), LAWC (SCS) b Determine the original, age, nutrient content and existing pollutants by sediment sampling. H Council, LAWC (C&E), LAWC (SCS) c Identify the need for further sedimentation studies for Brisbane Water. H Council, LAWC (C&E), LAWC (SCS) d To correct existing and minimise further sedimentation occurring within and around Brisbane Water. H Council, LAWC (C&E), LAWC (SCS) 6.2 Management Guidelines Water Depth and Sedimentation MANAGEMENT GUIDELINES PRIORITY FOR ACTION RESPONSIBILITY a Council continue to enforce its Erosion and Sedimentation Control Policy to minimise and avoid the generation of any soil erosion within the catchment and around the foreshore areas of Brisbane Water. H Council, LAWC (SCS) Brisbane Water Plan of Management - July 1995 Page 26
6.3 Management Actions MANAGEMENT ACTIONS PRIORITY FOR ACTION RESPONSIBILITY FUNDING Water Depth and Sedimentation a b c d e f Investigate alluvial deposits which are found to be increasing markedly from drains and watercourses, and design a program of works for the removal of the sediment to restore the bed and stabilisation of the catchment to preexisting levels. Council will encourage the Catchment Management Committee to review catchment land use principles to reduce the amount of sedimentation derived from catchment management activities which are detrimentally affecting water depth and water quality associated with the Brisbane Water estuary and its associated tributaries and watercourses. That the principle of catchment management planning will be part of the Stage 2 Program of Work associated with the Brisbane Water Plan of Management and Catchment Management Committee. To obtain a better understanding, it is considered that an investigation be undertaken into an assessment of the origin, nature and sediment movements of fine silts within Brisbane Water and any identified impacts on the ecology of the estuary. Council building codes be amended to limit site excavation for building construction in fragile soils of new subdivision and existing steep slope lands, including areas zoned 7(a) and 9. Institute monitoring and enforcement of the provisions in Council's Erosion and Sedimentation Control Policy No E5.04. H Council Council, LAWC (C&E) H Council, TCM Council, LAWC (C&E), EPA H Council, TCM Council, LAWC (C&E), EPA H Council, TCM Council, LAWC (C&E), EPA H Council Council H Council N/A Brisbane Water Plan of Management - July 1995 Page 27
- Page 1 and 2: GOSFORD CITY COUNCIL BRISBANE WATER
- Page 3 and 4: BACKGROUND TO MANAGEMENT PLAN TABLE
- Page 5: 11.4 Shore Based Services..........
- Page 8 and 9: B INTRODUCTION In the early 1990's
- Page 10 and 11: * The identification of a navigatio
- Page 12 and 13: D BACKGROUND OF THE PREPARATION OF
- Page 14 and 15: The Committee at its first meeting,
- Page 16 and 17: E (i) FUTURE OF THE STAGE 1 PLAN Po
- Page 19 and 20: 1.0 INTRODUCTION Brisbane Water is
- Page 21 and 22: 1.2 Estuary Management Policy The B
- Page 23 and 24: shore viewpoints; b c d e Varied op
- Page 25 and 26: Brisbane Water Plan of Management -
- Page 27 and 28: 2.2 Management Guidelines MANAGEMEN
- Page 29 and 30: MANAGEMENT GUIDELINES Estuarine Hab
- Page 31 and 32: MANAGEMENT GUIDELINES Estuarine Hab
- Page 33 and 34: 3.0 WATER QUALITY A fundamental obj
- Page 35 and 36: 4.0 HERITAGE WITHIN BRISBANE WATER
- Page 37 and 38: 5.0 WATER USE AND OCCUPATIONS WITHI
- Page 39 and 40: 5.2 Management Guidelines MANAGEMEN
- Page 41 and 42: MANAGEMENT GUIDELINES Water Use and
- Page 43: MANAGEMENT ACTIONS PRIORITY FOR ACT
- Page 47 and 48: 7.2 Management Guidelines MANAGEMEN
- Page 49 and 50: MANAGEMENT ACTIONS PRIORITY FOR ACT
- Page 51 and 52: MANAGEMENT ACTIONS PRIORITY FOR ACT
- Page 53 and 54: 8.2 Management Guidelines MANAGEMEN
- Page 55 and 56: 9.3 Management Actions MANAGEMENT A
- Page 57 and 58: MANAGEMENT GUIDELINES Public Water
- Page 59 and 60: MANAGEMENT OBJECTIVES Commercial an
- Page 61 and 62: GENERAL DESIGN AND SITING GUIDELINE
- Page 63 and 64: SHORE BASED SERVICES Commercial and
- Page 65 and 66: SHORE BASED SERVICES Commercial and
- Page 67 and 68: 11.6 Public Access PUBLIC ACCESS Co
- Page 69 and 70: 12.0 PLANNING PROVISIONS FOR BRISBA
- Page 71 and 72: - amenity values are protected; - t
- Page 73 and 74: Heritage Conservation Areas Interti
- Page 75 and 76: 15.0 REFERENCES Bell F.C., Edwards
- Page 77 and 78: Figure 14 - Boating Restrictions Fi
- Page 79 and 80: TABLE 3: AGREED MOORING CAPACITY FO
- Page 81 and 82: TABLE 4: CROSS SECTION RESULTS SUMM
- Page 83 and 84: BOAT RAMP REMARKS Correa Bay Brisba
- Page 85: TABLE 8: MARINA FACILITIES WITHIN B
6.3 <strong>Management</strong> Actions<br />
MANAGEMENT ACTIONS<br />
PRIORITY<br />
FOR<br />
ACTION<br />
RESPONSIBILITY<br />
FUNDING<br />
<strong>Water</strong> Depth and Sedimentation<br />
a<br />
b<br />
c<br />
d<br />
e<br />
f<br />
Investigate alluvial deposits which are<br />
found to be increasing markedly from<br />
drains and watercourses, and design a<br />
program <strong>of</strong> works for the removal <strong>of</strong><br />
the sediment to restore the bed and<br />
stabilisation <strong>of</strong> the catchment to preexisting<br />
levels.<br />
<strong>Council</strong> will encourage the Catchment<br />
<strong>Management</strong> Committee to review<br />
catchment land use principles to<br />
reduce the amount <strong>of</strong> sedimentation<br />
derived from catchment management<br />
activities which are detrimentally<br />
affecting water depth and water quality<br />
associated with the <strong>Brisbane</strong> <strong>Water</strong><br />
estuary and its associated tributaries<br />
and watercourses.<br />
That the principle <strong>of</strong> catchment<br />
management planning will be part <strong>of</strong><br />
the Stage 2 Program <strong>of</strong> Work<br />
associated with the <strong>Brisbane</strong> <strong>Water</strong><br />
<strong>Plan</strong> <strong>of</strong> <strong>Management</strong> and Catchment<br />
<strong>Management</strong> Committee.<br />
To obtain a better understanding, it is<br />
considered that an investigation be<br />
undertaken into an assessment <strong>of</strong> the<br />
origin, nature and sediment<br />
movements <strong>of</strong> fine silts within <strong>Brisbane</strong><br />
<strong>Water</strong> and any identified impacts on<br />
the ecology <strong>of</strong> the estuary.<br />
<strong>Council</strong> building codes be amended to<br />
limit site excavation for building<br />
construction in fragile soils <strong>of</strong> new<br />
subdivision and existing steep slope<br />
lands, including areas zoned 7(a) and<br />
9.<br />
Institute monitoring and enforcement <strong>of</strong><br />
the provisions in <strong>Council</strong>'s Erosion and<br />
Sedimentation Control Policy No<br />
E5.04.<br />
H <strong>Council</strong> <strong>Council</strong>,<br />
LAWC (C&E)<br />
H <strong>Council</strong>, TCM <strong>Council</strong>,<br />
LAWC<br />
(C&E), EPA<br />
H <strong>Council</strong>, TCM <strong>Council</strong>,<br />
LAWC<br />
(C&E), EPA<br />
H <strong>Council</strong>, TCM <strong>Council</strong>,<br />
LAWC<br />
(C&E), EPA<br />
H <strong>Council</strong> <strong>Council</strong><br />
H <strong>Council</strong> N/A<br />
<strong>Brisbane</strong> <strong>Water</strong> <strong>Plan</strong> <strong>of</strong> <strong>Management</strong> - July 1995 Page 27
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