데이터셋 상세
호주
Northern Beaches Council - Dee Why CBD Flood Study Update
Warringah Council has identified a need to prepare a drainage and flood mitigation plan for the Dee Why Town Centre. The plan is needed to accompany the Dee Why Town Centre Masterplan and Public Domain Improvements Plan that has been prepared to guide future redevelopment of the town centre. Council recognised that its existing 1D hydraulic model of the Dee Why CBD has limitations and instead decided to upgrade the floodplain model to a1D/2D model to provide a clearer understanding of the flood characteristics in and around Dee Why CBD. In view of Council’s aim to better understand overland flooding of the Dee Why CDB, it was decided to assemble both a SOBEK model and an xpswmm2D model of the study area to allow the estimated overland flood depths, velocities of flow and hazards to be compared and to identify any significant differences in overland flooding within the study area. The SOBEK model was assembled based on a 1m x 1m grid of surface elevations that was created using 12D and the ALS data supplied by Council. Buildings were represented by raising the surface elevations of all buildings within the building outlines around 10 m higher than the surrounding terrain. The xpswmm2D model of the Dee Why CBD was also based on the ALS data supplied by Council. The MapInfo building outline was imported into xpswmm2D and was used to “null” the grid points within the building outlines. The “nulling” of these grid points eliminated them from the computation scheme on the basis that flow was excluded from buildings. Both models were run for both the 100 yr ARI and PMF events using the local inflow hydrographs obtained from Council’s MIKE-11 model of the Dee Why CBD. Overland flood depths, velocities, velocity x depth and provisional flood hazards in the 100 yr ARI and PMF events were estimated in the Dee Why CBD. It was concluded that the SOBEK model and xpswmm2D model estimate similar 100 yr ARI and PMF overland flood levels and patterns of flow. It was concluded that around 60% of the estimated 100 yr ARI flood levels adjacent to properties are equal to or lower than the 100 yr ARI flood levels currently adopted by Council. Conversely around 40% of the estimated 100 yr ARI flood levels are higher than the 100 yr ARI flood levels currently adopted by Council. 10% of the estimated 100 yr ARI flood levels adjacent to properties are more than 0.25 m lower than currently adopted by Council. A further 10% of the estimated 100 yr ARI flood levels adjacent to properties are more than 0.33 m higher than currently adopted by Council. It was noted that overland flows in sections of Oaks Avenue, Howard Avenue, Dee Why Parade and Avon Road exceed the velocity x depth criterion for vehicular stability. Similarly the sections of the overland flowpath located above the trunk drainage line between Oaks Avenue and Howard Avenue and between Dee Why Parade and Richmond Avenue also exceed the velocity x depth criterion for pedestrian and vehicular stability. Similarly these areas were also assessed to have a provisional high hazard rating. It was concluded that around 80% of the estimated PMF flood levels adjacent to properties are equal to or lower than the PMF flood levels currently adopted by Council. Conversely around 20% of the estimated PMF flood levels are higher than the PMF flood levels currently adopted by Council. 10% of the estimated PMF flood levels adjacent to properties are more than around 0.6 m lower than currently adopted by Council. A further 10% of the estimated PMF flood levels adjacent to properties are more than 0.16 m higher than currently adopted by Council. It was noted that the sections of Oaks Avenue, Howard Avenue, Dee Why Parade and Avon Road that exceed the velocity x depth criterion for vehicular stability significantly increase in a PMF. Similarly almost all the overland flowpath located above the trunk drainage line between Oaks Avenue and Richmond Avenue also exceed the velocity x depth criterion for pedestrian and
데이터 정보
연관 데이터
Northern Beaches Council - Dee Why South Catchment Flood Study
공공데이터포털
This report has been prepared for Warringah Council to define the nature and extent of flood in the Dee Why South Catchment. Flood modelling was completed to define flood behaviour for a range of storm events from 1 year Average Recurrence Interval (ARI) to Probable Maximum Flood (PMF). The modelling shows that significant flows are conveyed in the piped drainage network and overland through roads and properties. Generally the main overland flowpath starts from several branches at Alfred Street to Beverley Job Park. Flows in the open channel at Victor Road and Redman Road combine with overland flows from Mooramba Road, Fisher Road, and Pittwater Road at the intersection of Redman Road and Pittwater Road. Overland flows are then conveyed along several roads and properties to Dee Why Lagoon as well as in the open channels between Pacific Parade / Oaks Avenue and downstream of Dee Why Parade. In a 1% AEP event, the results show that ponding of runoff occurs at several locations with restricted outlet capacity. High pedestrian areas in Dee Why CBD also experience overland flow inundation, particularly along Redman Road, Pittwater Road, Oaks Avenue and Howard Avenue. In a 1% AEP event floodway and high provisional hazard flow conditions along the open channels, on roads, and some properties including in the Dee Why CBD. A series of climate change scenarios were also modelled to evaluate potential impacts from elevated sea levels and increased rainfall intensity. Results showed that the modelled increases to Lagoon level have an impact to flood inundation of low-lying land near the Lagoon. Most properties within the Dee Why South catchment do not show a significant change in inundation extent for the modelled scenarios. Modelled increases in rainfall intensity showed a rise in peak water levels across the catchment, particularly in trapped low points such as on Sturdee Parade and Alfred Street. Council applies land use planning and development controls to manage development within flood prone areas. The flood result and mapping provided in the document will assist Council with future land use planning, development controls and floodplain risk management. The next stage of the floodplain risk management process following the adoption of the Flood Study is the Floodplain Risk Management Study and Plan. This next stage will investigate various floodplain risk management measures and prioritise these measures for implementation.
Port Stephens Council - Raymond Terrace - Flood Study
공공데이터포털
The Raymond Terrace Flood Study has been prepared for Port Stephens Council (Council) to define the existing flood behaviour in the western Raymond Terrace catchments and establish the basis for subsequent floodplain management activities. The study will also assist Council in considering future upgrades to the drainage network and flood relief pump capacity to the Hunter River. This project has been conducted under the State Assisted Floodplain Management Program and received State financial support.
Northern Beaches Council - Manly Lagoon Flood Study
공공데이터포털
Conclusions Provided below is a summary of the key findings of the Flood Study, in particular some of the important considerations for future floodplain risk management in the catchment:,
Griffith City Council - Griffith Major Overland Flow Floodplain Risk Management Study and Plan For CBD Catchments
공공데이터포털
The recommended Floodplain Risk Management Plan for the Griffith CBD catchments has been prepared in accordance with the NSW Floodplain Development Manual (Reference 6) and: * Is based on a comprehensive and detailed evaluation of all factors that affect and are affected by the use of flood prone land; and * Provides a long-term path for the future development of the community. Griffith is located approximately 450 km north of Melbourne and 560 km west of Sydney in the heart of the Murrumbidgee Irrigation Area (MIA). The CBD and residential areas of Griffith are located at the base of the McPherson Ranges (see Figure 1). Griffith and its surrounding villages of Yenda, Yoogali, Hanwood, Bilbul and Beelbangera lie within the Main Drain “J” catchment, which together with its network of drainage channels delivers runoff to Mirrool Creek. The Griffith CBD catchment has an area of approximately 9 km2. The upper part of the catchment is steep and covered in scattered timber and bushland. South of the bushland area the urban area begins and continues south to Wakaden St and the Temora-Roto Railway Line. This area is predominantly low density residential development. Griffith CBD lies to the south of the railway line, and is characterised by commercial and light industrial land uses. At the downstream extents of the CBD is the Main Canal which is raised above normal ground levels and is consequently a substantial obstruction to overland flow. The City of Griffith is not located on the banks of a major river system and therefore does not experience mainstream flooding as occurs at other centres within the Murrumbidgee River catchment for example Wagga Wagga. However, Griffith and its surrounding areas are affected by high volume rainfall events and also from flooding from the Main Drain J system. In the past, frequent flooding has occurred throughout the commercial areas of Griffith including Yambil Street, even in small rainfall events less than the 6 month ARI for example. Studies have indicated that this flooding has been due to a combination of catchment runoff, blockage and/or insufficient capacity of the sub-surface drainage systems and the associated siphon drainage systems, as well as the elevated railway and canal embankments that impede downstream overland flow paths. Within the study area flows are predominantly distributed and shallow at the upstream or northern sections of the CBD catchment and runoff generally ponds behind the various embankments that tend to be aligned normal to general flow direction such as the Main Canal and railway line, before being gradually discharged through the siphon outlets located under the Main Canal at the downstream boundary of the study area. The Flood Study (Reference 1) also found that the actual flow at the siphons was largely restricted by the upstream drainage system.
Northern Beaches Council - Mona Vale / Bayview Floodplain Risk Management Study and Plan
공공데이터포털
This Floodplain Risk Management Study and Plan for Mona Vale/Bayview has been undertaken by Cardno Lawson Treloar for Pittwater Council to identify and examine options for the management of flooding within the Mona Vale Main Drain and Cahill Creek floodplain. The study has been undertaken in accordance with the NSW Government Floodplain Development Manual (2005). A locality plan can be found in Figure 1.1. The outline of the study area can be found in Figure 1.2. Study Context This study forms two of the multiple stages of the Floodplain Management process which includes:,
Lake Macquarie City Council - Stony Creek Floodplain Risk Management Plan
공공데이터포털
This Floodplain Risk Management Study investigates what can be done to reduce or manage the effects of flooding in the catchment. The Floodplain Risk Management Plan recommends a mix of strategies to manage the risks of flooding. Using the merits-based approach advocated in the NSW State Government’s Floodplain Development Manual (2005) and in consultation with the community, Council and state agency stakeholders, a number of potential options for the management of flooding were identified. These options included: • flood modification measures; • property modification measures; and • emergency response measures. An extensive list of options was assessed against a range of criteria (technical, economic, environmental and social). Hydraulic modelling of some of the flood modification options was undertaken to provide a comprehensive analysis of those options that would involve significant capital expenditure.
Bayside Council - Bardwell Creek 2D Flood Study Review - Final Report
공공데이터포털
The study was commissioned by Bayside Council, with the assistance of the NSW Government Office of Environment and Heritage (OEH). Additional information has been provided by Sydney Water Corporation (SWC). The Flood Study comprises the development of computational hydrologic and hydraulic models that define design flood behaviour for the 20% AEP (0.2 EY), 10% AEP, 5% AEP, 1% AEP and 0.5% Annual Exceedance Probability (AEP) design storms and the Probable Maximum Flood (PMF) in the Bardwell Creek and Wolli Creek catchments.
Northern Beaches Council - Manly Lagoon Floodplain Risk Management Study and Plan
공공데이터포털
This report comprises an overview of the work that has been undertaken by WMAwater on the Manly Lagoon Floodplain Risk Management Study and Plan. It builds on prior stage reports and, in accordance with the Brief, it additionally includes a discussion of: • hydraulic and hazard categorisation; • future development scenarios; • review of climate change; • flood damages assessment; and • emergency management.
Northern Beaches Council - South Creek Floodplain Risk Management Plan report
공공데이터포털
Study Context The preparation of this plan follows on from the Flood Study (WMA, 2006) and Floodplain Risk Management Study (Cardno Lawson Treloar, 2007a) and forms the fifth stage of the Floodplain Risk Management Process which includes:,
moretonbaygis - MBRC Planning Scheme - Flood Hazard Overlay Drainage Investigation Areas
공공데이터포털
Version 1 February 2016 Moreton Bay Regional Council has finalised a new planning scheme that supports growth and maintains the region’s unique characteristics. The MBRC Planning Scheme is to commence 1 February 2016. Please use this data in conjunction with the Flood Hazard and North Lakes Locality.Planning schemes use zones and overlays to show the location and extent of special features that need to be considered, such as where land may be subject to hazards or other characteristics. Overlay maps may apply to all or part of your property and your property may be affected by more than one overlay. Having an overlay on your property will only affect you if you intend to develop (i.e. extent or build, change use, subdivide, clear native vegetation, fill or excavate). The attribute fields are defined as per Qld Planning Provisions, Schedule 2. The Queensland Planning Provisions (QPP) are the standard planning scheme provisions made by the Minister for Planning under Chapter 2, Part 5, Division 2 and Chapter 2, Part 6 of the Sustainable Planning Act 2009.
목록