Logo of State of the Environment 2011; Photo by Andrew Griffiths, Lensaloft

State of the Environment 2011 (SoE 2011)

State of the Environment 2011 Committee. Australia state of the environment 2011.
Independent report to the Australian Government Minister for Sustainability, Environment, Water, Population and Communities.
Canberra: DSEWPaC, 2011.

9 Heritage

4.5 Outcomes

Assessing heritage management outcomes requires informed evaluation of the way in which current pressures and emerging risks to heritage values are being reduced and the resilience of heritage is being improved to retain values. In short, this is an assessment of whether management objectives are being met.

A nationwide lack of monitoring and evaluation programs makes these assessments challenging and highly reliant on individual examples, anecdotal evidence and phenomenological data. Therefore, the judgements presented in this section are based on opinions expressed during the workshops held as part of the SoE 2011 reporting process (as outlined in Chapter 1).

4.5.1 Natural heritage

Australian national parks and other recognised natural heritage places are accessible to the community, strongly promoted both within Australia and overseas, presented to visitors in engaging ways and often important elements in community identity and sense of place.

Each Australian jurisdiction has a separate statutory basis and different structures and processes for natural heritage place management. At a national level, there is a strong focus on the National Reserve System, whose targets provide one way to assess the outcome for Australia's reserved lands. Judged in this way, our reserved lands include a sample of more than 10% of 51 of the nation's 85 bioregions. However, taking other factors into account such as subregions determined by vegetation communities, habitat and whole-of-landscape connectivity, reserved lands possibly cover as little as one-third of an adequate selection.18

Limited information is available on the conservation outcomes for natural heritage in Australian national parks, as only New South Wales and Victoria undertake substantive formal monitoring and evaluation of the state of parks (Box 9.34). Australia's Strategy for the National Reserve System 2009–2030 proposes that the states and territories standardise approaches to data collection and evaluation of management effectiveness.17 The sparse data that are available suggest that heritage values are generally being retained, although some decline in habitat and species loss is evident. Virtually no reliable national data are available to make objective judgements about natural heritage outside the parks system. The data we have relate primarily to inputs—many natural heritage areas have management measures in place to address threats within the bounds of available resources.

Box 9.34 Evaluation of heritage management effectiveness in Yuraygir National Park

Yuraygir National Park protects 65 kilometres of undeveloped coastline, the longest such stretch in New South Wales. Its rainforest, dry eucalypt forest, heathland and wetlands contain threatened species including the ground parrot, spotted-tailed quoll and sand spurge. A major fire in a remote section of the coastline in October 2009 led to an expansion of weeds in the park, with negative effects on reserve values. However, the thinned understorey presented an opportunity for weed control, with a focus on bitou bush and lantana.

After careful planning, approximately 95% of a five-kilometre stretch of coastline had ground-based and aerial weed control of post-fire weed growth. Following this intense control, regenerating natural vegetation has flourished. The work has protected three newly discovered populations of endangered sand spurge and two populations of sea bindweed, a priority species within the Bitou Threat Abatement Program.

The accumulated weed seedbank will need ongoing attention, as will exposed dunes because of their slower natural regeneration. The outcomes will continue to be monitored through on-ground surveys, and subsequent actions will continue to support recovery of native vegetation.

In New South Wales, the results of programs like this are captured annually through regional operational plans and the triennial management effectiveness survey called State of the Parks. The survey provides a standard framework for assessing all parks in the New South Wales reserve system and brings together multiple sources of evidence to contribute to evaluations, such as staff and specialist experience, planning documents, research and monitoring results, community information and corporate data. After a comprehensive review, this information is used to determine the overall effectiveness of management for issues across the reserve system and support ongoing planning and decision-making.

Jones Point before (left) and after (right) bitou bush control (photos by Jeff Thomas, New South Wales National Parks and Wildlife Service)

Source: Donna Quinn and Andrew Growcock, New South Wales National Parks and Wildlife Service

4.5.2 Indigenous heritage

There is no cohesive national picture for Indigenous heritage and no adequate action by government agencies to coordinate management of Indigenous heritage resources and share information. Assessing outcomes for Australia's Indigenous heritage is therefore severely hampered by lack of comparable data and the absence of formal monitoring and evaluation programs.

Differences between jurisdictional systems prevent reliable conclusions being drawn about the coverage of listed and protected Indigenous heritage places. However, the heritage values of Indigenous places in reserved lands or under Indigenous management are being retained. Little information is available on the effects of management action on the values of other parts of Australia's Indigenous heritage. Incomplete understanding of the resource, the current processes used to respond to development pressures and the tendency of consent agencies to permit site destruction continue to place Indigenous heritage sites at risk.

Despite these shortcomings, Australia's Indigenous heritage is celebrated by Indigenous people, often accessible to the wider community, strongly promoted within Australia and overseas, and increasingly presented by Indigenous people in accordance with relevant cultural practices (Box 9.35).

Box 9.35 Effective Indigenous land and sea management—Magamarra, Arnhem Land coast, Northern Territory

Magamarra is a marine sacred site within the estuarine waters of the Blyth River on the Northern Territory Arnhem Land coast. The site is within the custodial waters of the Guwowura and Mareang A-Jirra groups, upstream from the Blyth River mouth, between the townships of Maningrida and Ramingining.

Magamarra is a significant site to the Guwowura and Mareang A-Jirra people of northern Arnhem Land, and is used mainly for cultural burial ceremonies related to commemorating the dead. It is a place for renewal, reflection and commemoration. It is the final resting place for all Guwowura and Mareang A-Jirra people and where the spirits of their ancestors chose to base themselves for eternity.

When we die, our spirits come here to rest in the mermaids' castle. Our spirits join those of our ancestors. This is where we are reincarnated in the waters. Traditional custodian

Magamarra encompasses objects within the Blyth River waters such as the Barala (sand sculpture), stone statues and other objects that embody ancestral spiritual beings. The site was created by ancestral beings in the dreaming. The physical condition and integrity of this site are vital to the cultural wellbeing of the Guwowura and Mareang A-Jirra people. Magamarra is also part of daily life for approximately 40 people living at remote outstations or on country. The Magamarra site is in the custodial waters of the Guwowura and Mareang A-Jirra clans, but may be used by other groups with shared boundaries. The site is also intrinsically linked to the surrounding cultural landscape that incorporates many other marine and terrestrial sacred sites.

Magamarra is a registered sacred site under the Northern Territory Aboriginal Sacred Sites Act 1989, and access to the site is restricted. The mouth of the Blyth River is registered as a sacred site and is demarcated by signage and a closing line, which is designed to prevent people (especially fisherman) from entering the sacred site. The traditional custodians of Magamarra have unrestricted access to the site as it is situated on Aboriginal land.

In 2009, after many years of consultation and negotiation, the lands around Magamarra were declared Australia's 33rd Indigenous protected area (IPA). The Djelk IPA is managed by the Bawinanga Aboriginal Corporation, based in Maningrida, and is serviced by a large team of rangers known as the Djelk Men's and Women's Rangers.

Magamarra has a high level of protection compared to other Indigenous heritage sites—it is located on Aboriginal lands within an IPA managed by Aboriginal rangers and is registered as a sacred site. Unlike traditional custodians of sacred sites in other parts of Australia, traditional custodians of Magamarra have the legal right to control access to the site and to enforce customary laws associated with the site through offences such as trespass and desecration of sacred sites. Nevertheless, the effectiveness of Magamarra's legal protection is questioned by traditional custodians who have customary responsibility for its protection.

The Blyth River is also a well-known place for recreational and commercial barramundi fishers. Traditional custodians perceive illegal fishing activities at Magamarra as the most significant threat to the site's condition and integrity. Traditional custodians report ongoing problems with commercial fishermen not respecting Aboriginal law or culture and entering the site at night.

The Djelk Rangers who manage the whole protected area support the traditional custodians. The rangers mainly deal with environmental issues relating to the area, but are also called in when people are destroying or desecrating sites. However, the long distances from fisheries enforcement officers often mean offenders cannot be apprehended and prosecuted. There would be merit in exploring the possibility of Indigenous rangers becoming fully-fledged fisheries officers with enforcement powers.

Source: Schnierer et al.12

4.5.3 Historic heritage

Historic heritage places are usually accessible, often cherished, increasingly presented to visitors in engaging ways and recognised as important elements in community identity and sense of place.

Through the Historic Heritage Chairs and Officials of Australia and New Zealand, there is some national coordination of the management of Australia's historic heritage resources, despite the separate statutes and different government structures in each jurisdiction.

Australia's listed historic sites are numerous, but have been assessed, listed and protected in an ad hoc manner. Although the Australian heritage database offers a convenient portal to information about more than 20 000 natural, historic and Indigenous heritage places, it does not include all the statutory heritage lists and is difficult to use. There are no readily available national data that allow assessment of the representativeness of the national set of listed historic places. Limited information is available on the effectiveness of historic heritage management, as very little monitoring and evaluation takes place. However, select sampling of a small set of historic places suggests that the heritage values of our listed historic sites are generally being retained.11

Assessment summary 9.3—Effectiveness of heritage management
  Summary Assessment grade Confidence
Ineffective Partially effective Effective Very effective in grade in trend
Natural heritage
Identification Context: Australian parks managers have a good understanding of Australia's bioregions and subregions. The specific heritage values of most reserved lands are understood. Discussion and debate continues on matters such as what constitutes an adequate sample, how to create landscape connectivity, the size and configuration of reserves, and how to account for habitat, resilience and recovery Recent trends: stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Planning: There is a clear aim to include 10% of each of Australia's bioregions within the National Reserve System
Natural heritage should be better represented on statutory heritage registers
Recent trends: deteriorating Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Inputs: Funding for survey and assessment of natural values is declining. Reservation of additional lands of conservation value continues to be substantially dependant on public sector budget allocations and opportunistic acquisition Recent trends: deteriorating   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
Processes: The National Reserve System provides an overall framework for assessments, which generally take place at the state or local level Recent trends: stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
Outcomes: Australia's reserved lands include a sample of more than 10% for 51 of the nation's 85 bioregions; however, taking other factors like habitat and connectivity into account, the reserved lands may only cover one-third of an adequate selection Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Management Context: Management needs and processes are well understood by Australian park managers Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
Planning: Many, but not all, major national parks and reserved lands have management plans, with well-resolved provisions and appropriate regulatory controls. Responses to pressures and management responsibilities are clearly identified Recent trends: Improving Confidence: Limited evidence or limited consensus Confidence: Limited evidence or limited consensus
Inputs: The majority of Australian parks are understaffed and lack adequate resources to address major conservation priorities, including emerging urgent pressures. Conservation programs are constrained by available resources Recent trends: deteriorating Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Processes: Management systems in parks identify conservation needs and make well-informed decisions about impact assessment and resource allocation. However, formal monitoring and evaluation occurs in few jurisdictions Recent trends: Unclear Confidence: Limited evidence or limited consensus Confidence: Evidence and consensus too low to make an assessment
Outcomes: Limited information is available on the state of parks, as only New South Wales and Victoria undertake substantive monitoring and evaluation of outcomes. Available data suggest that heritage values are generally being retained, with some decline evident Recent trends: Improving Confidence: Limited evidence or limited consensus Confidence: Limited evidence or limited consensus
Protection Context: Statutory controls for listed natural heritage places and the reservation system are well understood by park and place managers Recent trends: stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Planning: The National Reserve System program is seeking to include bioregions that are poorly represented in reserved lands. However, additional work on related factors such as habitat and connectivity is needed to understand what constitutes an adequate sample of reserved lands Recent trends: stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Inputs: Additional land reservation occurs without proportional increases in public sector resourcing. Resourcing for survey and assessment is modest compared to the size and significance of the resource, and is declining Recent trends: deteriorating Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Processes: The National Reserve System offers a coordinated response to the need for a nationwide reserve system. Listing processes for other aspects of natural heritage are less well coordinated and transparent. Federal, state and local protective measures and controls are less well understood by the general community Recent trends: Unclear Confidence: Adequate high-quality evidence and high level of consensus Confidence: Evidence and consensus too low to make an assessment
Outcomes: Natural heritage areas have management measures in place to address threats within the bounds of available resources. Natural heritage values of parks and listed natural heritage sites are generally being retained Recent trends: stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Leadership At a national level, there is a strong focus on the National Reserve System and a structure is in place to facilitate information sharing. However, each jurisdiction has a separate statutory basis, and different structures and processes for natural heritage management Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Celebration Australian national parks and other recognised natural heritage places are accessible to the community, strongly promoted within Australia and overseas, presented to visitors in engaging ways, and often important elements in community identity and sense of place Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Indigenous heritage
Identification
 

Context: Understanding of the nature and extent of Australia's Indigenous heritage, both tangible and intangible, is inadequate. Indigenous places are also typically seen as individual physical sites rather than part of the rich cultural landscape that is country

Recent trends: Stable     Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
 

Planning: There is a clear need for nationally coordinated policies and programs that proactively document and assess Indigenous heritage, rather than reactively responding to threats

Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
  Inputs: Funding for survey and assessment of Indigenous heritage values is usually directly proportional to the threat posed by a particular development. Resources available for documenting intangible heritage and country are inadequate Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Processes: The Australian Government provides little leadership or coordination in Indigenous heritage assessment. Most assessments occur at the state level in response to threats. Some state jurisdictions are significantly improving assessment processes Recent trends: Improving   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Outcomes: It is not possible to ascertain whether identified, listed and protected Indigenous heritage places provide a representative or adequate sample     Confidence: Evidence and consensus too low to make an assessment Confidence: Evidence and consensus too low to make an assessment
Management
 

Context: Managers and decision-makers do not always fully understand the needs and processes that apply to Indigenous heritage, especially the role of traditional land and sea management. However, there has been significant recent improvement, including an increasing role for Indigenous people

Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Planning: Management plans for reserved lands usually include provisions for Indigenous heritage management, with well-resolved provisions that have been prepared in consultation with traditional owners. Stand-alone Indigenous land and sea management plans are also being prepared. Unlisted Indigenous heritage places suffer from lack of planning processes Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Inputs: Australia's listed Indigenous sites (and even land-management programs such as Caring for our Country) do not allocate adequate resources to address major conservation priorities. Conservation programs for intangible heritage are severely constrained by limits on available resources   Recent trends: Stable Confidence: Limited evidence or limited consensus Confidence: Limited evidence or limited consensus
 

Processes: Management systems for Indigenous heritage do not always make well-informed decisions about impact assessment and resource allocation, especially in the case of development-driven impact assessment in the absence of knowledge of the total resource

Little if any formal monitoring and evaluation occurs

  Recent trends: Stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Outcomes: Very limited, partial information is available on the effects of management action on the values of Australia's Indigenous heritage There is no evidence of formal evaluation of outcomes     Confidence: Evidence and consensus too low to make an assessment Confidence: Evidence and consensus too low to make an assessment
Protection
  Context: Statutory controls for Indigenous heritage places are generally understood, despite jurisdictional inconsistencies Recent trends: Stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
 

Planning: Indigenous heritage is under-represented on statutory heritage lists and registers and is not effectively supported by statutes that claim to provide blanket protection, but also allow progressive site destruction

Recent trends: Deteriorating   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
  Inputs: Resources allocated for listing and protection of Indigenous heritage places are inadequate and often a post-event reaction to adverse impacts. Insufficient attention is paid to intangible values and places, and to effective means of providing protection in ways other than listing or reservation Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
  Processes: Management systems for Indigenous heritage places within reserved lands identify conservation needs, involve traditional owners and make generally well-informed decisions about impact assessment and resource allocation. However, outside the reserved lands system, Indigenous heritage decisions are less consultative and often reactive to threats Recent trends: Improving   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Outcomes: The heritage values of Indigenous places in reserved lands or under Indigenous management are being retained. However, our incomplete understanding of the resource and the current processes used to respond to development pressures mean that other Indigenous heritage sites continue to be at risk Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
Leadership
  There is no cohesive national picture for Indigenous heritage, and no adequate action by government agencies to coordinate management of Indigenous heritage resources and share information. Each jurisdiction has a separate statutory basis and different structures and processes for Indigenous heritage management Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Celebration
  Australia's Indigenous heritage is celebrated by Indigenous people, often accessible to the wider community, strongly promoted within Australia and overseas, and increasingly presented by Indigenous people in accordance with relevant cultural practices Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Historic heritage
Identification
  Context: Statutory lists and registers have grown in an ad hoc manner and provide a partial understanding of the extent of Australia's historic heritage. In some areas, systematic thematic survey and assessment provides more thorough coverage, but this is the exception. Historic places are also typically seen as individual sites rather than part of a cultural landscape Recent trends: Improving   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Planning: While the assessment and listing process might be improved, most Australian jurisdictions include identification and listing of historic heritage items at all levels of government Recent trends: Stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Inputs: Funding for surveying and assessing historic values is difficult to measure on a national basis, but is declining for the National Heritage List Recent trends: Deteriorating   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
 

Processes: The Australian Government provides leadership in historic heritage assessment through the Heritage Chairs and Officials of Australia and New Zealand, which has identified a range of relevant standards and consistent assessment criteria

Most assessments take place at the state or local level

Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
  Outcomes: Australia's listed historic sites are numerous, but are protected in an ad hoc manner that does not facilitate judgement of total adequacy or representativeness Recent trends: Improving   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
Management
  Context: Management needs and processes are well understood by Australian historic heritage managers   Recent trends: Stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Planning: Many, but not all, major listed historic sites have conservation management plans with well-resolved provisions and appropriate regulatory controls. However, other significant sites lack such plans, or their plans are outdated or have inappropriate content Recent trends: Stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
 

Inputs: Many Australian historic sites in public ownership are understaffed and lack adequate resources to address major conservation priorities, including emerging urgent pressures

Private owners of historic sites do not receive incentives that are proportional to the public value of the places they own and manage. Grant funding, though substantial during the Jobs Fund initiative, is now in decline

Recent trends: Deteriorating   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Processes: Management systems at all levels of government generally facilitate well-informed decisions about impact assessment and resource allocation for historic heritage; however, formal monitoring and evaluation occurs in few jurisdictions Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
 

Outcomes: Limited information is available on the effectiveness of historic heritage management, as there is only partial monitoring and evaluation of outcomes

Available data suggest that heritage values are generally being retained

Recent trends: Unclear   Confidence: Limited evidence or limited consensus Confidence: Evidence and consensus too low to make an assessment
Protection
  Context: Statutory controls for historic heritage places are generally understood, despite inconsistencies and overlap both within and between jurisdictions   Recent trends: Stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Planning: Historic sites receive a high degree of statutory protection once they are identified and included in statutory heritage lists   Recent trends: Stable Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Inputs: Some historic heritage places are allocated resources for conservation, but rarely at a level that will ensure heritage values are retained across the nation. Private owners in particular could be better supported, especially through indirect means (such as tax or rates relief) Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
 

Processes: Management systems for listed historic places in public ownership identify conservation needs and generally make well-informed decisions about impact assessment and resource allocation; however, formal monitoring and evaluation occurs in few jurisdictions

For privately owned, listed historic places, the systems for assessing impact and resource allocation vary across jurisdictions but usually consider heritage value and stakeholder opinion

Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
  Outcomes: Many historic heritage places, especially those in public ownership, have management measures in place to address threats within the bounds of available resources. The values of listed historic heritage sites are generally being retained Recent trends: Stable   Confidence: Adequate high-quality evidence and high level of consensus Confidence: Limited evidence or limited consensus
Leadership
  Through the Historic Heritage Chairs and Officials of Australia and New Zealand, a structure is in place to coordinate management of historic heritage resources and share information, despite the separate statutory basis and different structures in each jurisdiction. However, recent funding cuts at the national level pose a direct threat to the Australian Government's important leadership role   Recent trends: Deteriorating Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Celebration
  Historic heritage places are usually accessible, often cherished, increasingly presented to visitors in engaging ways, and recognised as important elements in community identity and sense of place Recent trends: Improving Confidence: Adequate high-quality evidence and high level of consensus Confidence: Adequate high-quality evidence and high level of consensus
Recent trends  Improving  Stable Confidence  Adequate high-quality evidence and high consensus
 Deteriorating  Unclear  Limited evidence or limited consensus
 Evidence and consensus too low to make an assessment
Grades  Very effective
 Effective
 Partially effective
 Ineffective
Old wurlie (dust storm shelter), near Lake Torrens, South Australia. Photo by Peter Ahrens