Remote sensing of fire regimes in semi-arid Nusa Tenggara Timur, eastern Indonesia: current patterns, future prospects
Rohan Fisher A B G , Wilfrida E. Bobanuba C , Agus Rawambaku D , Greg J. E. Hill B E and Jeremy Russell-Smith A FA Tropical Savannas Management Cooperative Research Centre, Darwin, NT 0909, Australia.
B Charles Darwin University, Darwin, NT 0909, Australia.
C Badan Perencanaan Pembangunan Daerah, Bajawa, Nusa Tenggara Timur 861412, Indonesia.
D Badan Perencanaan Pembangunan Daerah, Waingapu, Nusa Tenggara Timur 87112, Indonesia.
E University of the Sunshine Coast, Maroochydore, Qld 4558, Australia.
F Bushfires Council NT, Winnellie, NT 0821, Australia.
G Corresponding author. Email: cycadmedia@bigpond.com
International Journal of Wildland Fire 15(3) 307-317 https://doi.org/10.1071/WF05083
Submitted: 12 September 2005 Accepted: 3 May 2006 Published: 5 September 2006
Abstract
Substantial areas of eastern Indonesia are semi-arid (with a pronounced dry season extending from April to November) with extensive areas of uncultivated vegetation dominated by savanna grasslands and woodlands. These are highly fire-prone, despite high population densities reliant on intensive subsistence agriculture and an official national fire policy that prohibits all burning. To date, no regional studies have been undertaken that reliably assess the seasonal extent and patterning of prescribed burning and wildfire. Focusing on two case studies in east Sumba (7000 km2) and central Flores (3000 km2) in the eastern Indonesian province of Nusa Tenggara Timur, the present paper addresses: (1) the efficacy of applying standard remote sensing and geographic information system tools as developed for monitoring fire patterns in savanna landscapes of adjacent northern Australia, for (2) describing the seasonal patterning of burning at village and broader regional scales in 2003 and 2004. Despite recurring cloudiness, which significantly affected daily fire detection of ‘hotspots’ from Advanced Very High Resolution Radiometer and Moderate Resolution Imaging Spectroradiometer sensors, fire mapping from Landsat imagery was undertaken successfully to reveal: (1) fires burnt an annual average of 29% of eastern Sumba (comprising mostly grassland savanna), and 11% of central Flores (with large forested areas); (2) most fire extent occurred in savanna grassland areas, and significantly also in cultivated lands and small remnant patches of forest; (3) most fire activity occurred under harsh, late dry season conditions; and (4) while the great majority of individual fires were less than 5 ha, some late dry season fires were hundreds of hectares in extent. The potential routine application of different image sensors for fire mapping and hotspot detection is considered in discussion.
Additional keywords: extent; fire mapping; frequency; livelihoods; management; patch size; policy; savanna; seasonality.
Edwards A, Hauser P, Anderson M, McCartney J, Armstrong M, Thackway R, Allan GE, Hempel C , Russell-Smith J (2001) A tale of two parks: Contemporary fire regimes of Litchfield and Nitmiluk National Parks, monsoonal northern Australia. International Journal of Wildland Fire 10, 79–89.
| Crossref | GoogleScholarGoogle Scholar |
Justice C, Smith R, Gill M , Csiszar I (2003) A review of current space-based fire monitoring in Australia and the GOFC/GOLD program for international coordination. International Journal of Wildland Fire 12, 247–258.
| Crossref | GoogleScholarGoogle Scholar |
Markham BL, Storey JC, Williams DL , Irons JR (2004) Landsat sensor performance: History and current status. Geoscience and Remote Sensing 42, 2691–2694.
| Crossref | GoogleScholarGoogle Scholar |
Mudiyarso D, Lebel L, Gintings AN, Tampubolon SMH, Heil A , Wasson M (2004) Policy responses to complex environmental problems: policy activity on transboundary haze from vegetation fires in Southeast Asia. Agriculture Ecosystems & Environment 104, 47–56.
| Crossref | GoogleScholarGoogle Scholar |
Russell-Smith J, Yates CP, Edwards A, Allan GE, Cook GD, Cooke P, Craig R, Heath B , Smith R (2003) Contemporary fire regimes of northern Australia: change since Aboriginal occupancy, challenges for sustainable management. International Journal of Wildland Fire 12, 283–297.
| Crossref | GoogleScholarGoogle Scholar |
Siegert F, Ruecker G, Hinrichs A , Hoffmann AA (2001) Increased damages from fires in logged forests during droughts caused by El Nino. Nature 414, 437–440.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
Yates CP , Russell-Smith J (2003) Fire regimes and vegetation sensitivity analysis: An example from Bradshaw Station, monsoonal northern Australia. International Journal of Wildland Fire 12, 349–358.
| Crossref | GoogleScholarGoogle Scholar |