SLATS vegetation management analysis

Statewide Landcover and Trees Study (SLATS) is an annual scientific monitoring program undertaken by the Department of Environment and Science’s Remote Sensing Centre. SLATS uses satellite imagery to monitor changes in woody vegetation extent in Queensland.

In conjunction with the Remote Sensing Centre, the Department of Resources utilises the Early Detection System (EDS) as the primary tool to rapidly detect vegetation canopy cover change (every 16 days) within regulated vegetation areas. This provides timely monitoring, and the opportunity for early engagement with landholders if unexplained clearing is identified.

Further analysis of SLATS data is used as a validation tool to complement EDS. This SLATS analysis provides the department further intelligence regarding annual clearing activity in the context of the vegetation management framework. The analysis intersects SLATS data with available property-level data derived from accepted development vegetation clearing code notifications, development approvals and area management plans as well as spatial layers that represent exemptions. This generates a detailed breakdown of the statewide clearing identified in SLATS.

Regulated vegetation clearing data

Clearing of regulated vegetation reduced from about 195,000 hectares in 2018-19 to 96,000 hectares in 2019-20.

Clearing of Category X areas reduced from about 486,400 hectares in 2018-19 to 321,200 hectares in 2019-20. Areas are classified Category X if they have been previously cleared. They are generally exempt under the vegetation management framework.

Categories include the following:

  • Category X areas are divided into Category X areas on property maps of assessable vegetation (PMAV) or Category X areas on the regulated vegetation management map (RVMM) respectively. Clearing in all Category X areas is generally exempt from requirements under the vegetation management framework.
  • Accepted development vegetation clearing codes (ADVCCs) are self-assessable codes that apply to low-risk vegetation management activities. Landholders must notify of their intention to clear and then comply with the provisions of the relevant code.
  • Exempt other clearing represents clearing that can be identified as exempt (other than Category X areas) under the vegetation management framework using available spatial layers. This includes tenures and grasslands not regulated under the Vegetation Management Act 1999 as well as clearing for resource activities (which are regulated under other legislation) and exempt clearing in urban areas.
  • Development applications under the Planning Act may be approved for a specified purposes that involve the clearing of vegetation. When approvals are granted, the approved clearing of identified regulated vegetation is lawful.
  • Area management plans (AMPs) apply to self-assessable, region-specific low-risk vegetation management activities. Landholders must notify the department of their intention to clear and then comply with the provisions of that AMP.
  • All remaining clearing is categorised as ‘unexplained clearing’. Further analysis is undertaken by vegetation management staff to evaluate the identified clearing areas and assess these for further action as appropriate.

For more information, read an explanation of vegetation management framework mapping. You can also read details of vegetation management classes (i.e. endangered, of concern, least concern).

Figure 1: SLATS total clearing under the vegetation management framework Comparison between 2018-19 (681,000ha) and 2019-20 (418,000ha)

Clearing purposes/codes that are not displayed in the table made up less than 1% of the total clearing in both 2018-19 and 2019-20.

Clearing purpose 2018-19 area cleared (ha)
(% of total 102,500ha)
2019-20 area cleared (ha)
(% of total 33,500ha)
Multiple purposes 19,900
(19.4%)
13,200
(39%)
Fodder harvesting 71,300
(69.2%)
12,000
(35.4%)
Native forest practice 5,400
(5.2%)
6,600
(19.5%)
Encroachment (<1%) 950
(2.8%)
Managing weeds (<1%) (1.1%)

Clearing purposes/codes that are not displayed in the table made up less than 1% of the total clearing in both 2018-19 and 2019-20.

Clearing purpose2018-19 area cleared (ha)
(% of total 2,800ha)
2019-20 area cleared (ha)
(% of total 2,000ha)
Managing thickened vegetation 1,430
(51.8%)
1,250
(63.5%)
Managing thickened vegetation/Encroachment  440
(22.3%)
Managing weeds 670
(24.4%)
180
(9.1%)
Encroachment (<1%)92
(4.7%)
Fodder harvesting 620
(22.3%)

Clearing purposes/codes that are not displayed in the table made up less than 1% of the total clearing in both 2018-19 and 2019-20.

Clearing purpose 2018-19 area cleared (ha)
(% of total 6,100ha)
2019-20 area cleared (ha)
(% of total 1,600ha)
MCU/RaL 620
(10.2%)
740
(43.3%)
High-value-agriculture 89
(1.5%)
550
(32.1%)
Fence/Firebreak/Road/Infrastructure (<1%) 150
(8.8%)
Multiple purposes 100
(1.7%)
120
(7.1%)
Managing thickened vegetation (<1%) 69
(4%) 
Extractive industry (<1%) 44
(2.6%)
Necessary environmental clearing   35
(2.1%)
Fodder harvesting 5,200
(85.6%)

Figure 2: SLATS full and partial clearing of regulated vegetation under the vegetation management framework Comparison between 2018-19 (195,000ha) and 2019-20 (96,000ha)

For detailed definitions of full and partial clearing, see the SLATS report 2018-19.

Type of clearing Full clearing (ha) Partial clearing (ha) Total (ha)
2018-192019-202018-192019-202018-192019-20
Unexplained 34,300 21,100 29,400 17,200 63,700 38,300
ADVCC 45,700 10,400 56,800 23,100 102,500 33,500
Exempt other 13,700 14,200 6,100 6,900 19,800 21,100
DA 800 1,200 5,300 400 6,100 1,600
AMP 1,500 500 1,300 1,500 2,800 2,000

Clearing by vegetation management class of regulated vegetation

Read details of vegetation management classes (i.e. endangered, of concern, least concern).

Clearing type Vegetation management category Endangered (ha) Of concern (ha) Least concern (ha)
Unexplained Regulated remnant 2,680 7,262 23,754
Regulated regrowth 1,259 1,607 1,769
ADVCC Regulated remnant 674 9,223 21,864
Regulated regrowth 212 820 676
Exempt other Regulated remnant 651 1,701 16,503
Regulated regrowth 469 820 903
DA Regulated remnant 60 197 1,319
Regulated regrowth 9 32 39
AMP Regulated remnant 0 1,194 763
Regulated regrowth 0.001 0.003 8
Total 6,014 22,857 67,596

Read details of vegetation management classes (i.e. endangered, of concern, least concern).

Clearing type Vegetation management category Endangered (ha) Of concern (ha) Least concern (ha)
Unexplained Regulated remnant 2,563 9,708 46,092
Regulated regrowth 1,096 1,809 2,469
ADVCC Regulated remnant 744 7,659 91,973
Regulated regrowth 276 751 1,045
Exempt other Regulated remnant 655 1,061 15,805
Regulated regrowth 425 1,031 745
DA Regulated remnant 43 159 5,805
Regulated regrowth 18 40 20
AMP Regulated remnant 0 1,432 1,297
Regulated regrowth 0 0 31
Total 5,820 23,650 165,282