Riana flood map & planning overlays
A planning-constraint profile of Riana
(Central Coast, TAS) - 58.04 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
58.04 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Riana's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Riana
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
Observed overflight - sampled 4 Sep to 3 Oct 2026
Night movements: observed, lowest 5,500 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
Traffic is sampled rather than watched continuously, so every figure is a floor: aircraft not captured between samples are not represented. Rates are per 500 m square - the busiest square in the suburb, not a count of flights over the suburb - and a square is only rated where enough traffic was seen to measure it. Altitudes are above mean sea level. Flight paths change with runway use, weather, season and airspace design. This is a record of observed traffic; it is not a noise contour and not a planning control.
Riana at a glance
How Riana is zoned
Buying in Riana? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 58.04 km², Riana is highly constrained by planning overlays. About 5% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. The dominant land-use zone is Agriculture. The median lot measures about 96,894 m² across 252 parcels.
Who lives in Riana
Census 2021 figures published by the ABS for the Riana suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 946, and decile 6 within Tasmania. The national average is 1000.
Age profile
Share of Riana's 313 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Burnie - Ulverstone Surrounds, the wider ABS statistical area containing Riana. There is no annual population series published at suburb level, so this describes the surrounding area rather than Riana itself.
5,410 in 2001 to 5,426 in 2025, up 0%.
Source: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Riana data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Bushfire-prone mapping | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Zoning | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Heritage and environment | Mapped where published | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Aircraft noise contours (ANEF) | Not held | the Tasmanian Planning Scheme and the LIST (Land Tasmania), Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 3 October 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
Check a specific Riana address
See exactly which overlays touch a single property - the interactive map is free. Need it on paper? A full planning PDF is just $9.
The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Published flood models are held here: a Flood Model Report is available for about 150 Riana addresses (+$9 with the planning report).
See what's in the $9 report →Riana planning - frequently asked
Is Riana flood-prone?
About 5% of Riana falls within a mapped flood overlay, against the council-wide suburb average of 10%. Modelled flood depth, velocity and flood level are held for about 150 Riana addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Riana bushfire-prone?
Around 100% of Riana is mapped as bushfire-prone, compared with a Central Coast average of 96%.
Is Riana under a flight path?
Aircraft were observed over about 8% of Riana in the period sampled, but only above 3,000 ft - the lowest measured was 1,500 ft. Traffic is sampled rather than watched continuously and flight paths change with runway use, weather and season; the ANEF contour is the planning instrument.
What is the zoning in Riana?
The dominant planning zone in Riana is Agriculture, though the suburb also includes Rural and Environmental Management.
Does Riana have heritage-listed places?
No heritage-listed places are on record within Riana.
What is the typical lot size in Riana?
Across 252 surveyed parcels in Riana, the median lot size is about 96,894 m².
What is the population of Riana?
At the 2021 Census Riana had 313 usual residents, with a median age of 45 and an average household size of 2.5 people. The wider Burnie - Ulverstone Surrounds statistical area, which contains Riana, went from 5,410 people in 2001 to 5,426 in 2025, up 0%.
Is Riana an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Riana scores 946 and sits in decile 3 of 10 nationally and decile 6 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Riana?
Median household income in Riana was $1,575 a week at the 2021 Census, against $1,374 for the typical suburb in Central Coast. Median rent was $250 a week and the median mortgage repayment $1,343 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Camena | 4.0 km | 9% | 100% |
| South Riana | 5.3 km | 9% | 100% |
| Natone Burnie |
6.2 km | 7% | 100% |
| West Pine | 6.9 km | 6% | 100% |
| North Motton | 8.8 km | 10% | 100% |
| Upper Natone Burnie |
9.0 km | 6% | 100% |
| Cuprona | 9.0 km | 6% | 100% |
| Upper Stowport Burnie |
9.4 km | 6% | 100% |
| Gunns Plains | 9.4 km | 15% | 100% |
| Penguin | 9.8 km | 7% | 95% |