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Landslides

, Volume 15, Issue 1, pp 145–159 | Cite as

Location-based environmental factors contributing to rainfall-triggered debris flows in the Ba river catchment, northwest Viti Levu island, Fiji

  • M. StephensEmail author
  • J. H. Lowry
  • A. R. Ram
Recent Landslides

Abstract

Mass movements in tropical Pacific small island developing states (SIDS) can be devastating although studies are relatively few and contributing environmental factors are not often investigated in detail. On 25 January 2012, following 3 days of heavy monsoonal rainfall (c. 550 mm) during a La Niña episode, more than 150 debris flows were triggered in the western part of the Ba river catchment of northwest Viti Levu island, Fiji. Reconnaissance field survey and geographical information system (GIS) analyses using high-resolution satellite imagery were carried out to investigate factors that may have led to the occurrence of the debris flows in the catchment. We evaluated the correlation between the density of mass movements (number of mass movements/km2) and several continuous variables using data measured within the GIS. There was a weak but significant positive correlation between mass movement density and elevation (r = 0.38, p value < 0.01), cyclonic precipitation (r = 0.37, p value < 0.01) and stream density (r = 0.31, p value < 0.01). Ninety-three percent of the mass movements occur within a plantation of Pinus caribaea (Caribbean pine) on slopes oriented mainly to the northeast and east on (trade) windward slopes and may be significant factors for their development. Although forests generally have a stabilizing effect on slopes, the plantation at Ba was a mature stand on its second plantation cycle and is a species that has a shallow rooting system making it more susceptible to failure.

Keywords

Rainfall-triggered mass movements Debris flow GIS Environmental factors Small island developing states Fiji 

Notes

Acknowledgments

The authors are very thankful for a research grant from the Faculty of Science, Technology & Environment at the University of the South Pacific (USP), awarded to MS to conduct fieldwork in the Ba river catchment. The Fiji Meterological Service (FMS) is thanked for kindly providing rainfall data for Lautoka Mill. Gratitude is shown to Mr. Eroni Kata (district officer) for assisting with the fieldwork. Mr. Waisea Tuinuku and Mr. Jokatama Rarasea are also thanked for their invaluable assistance as guides in the field. Mrs. Mereoni Senivesi, Mrs. Luisa Rarasea, and Mrs. Erenesau Kubu are thanked for their hospitality during fieldwork. Mr. Kalivati Qolicokota (field assistant, USP) is also thanked for his very useful assistance in the field. MS would like to acknowledge Mr. Ezekiel Tabua for his correspondence regarding the Caribbean pine plantation at Ba. The authors would like to thank Mr. Tevita Naisau (postgraduate student, USP), for digitizing several of the GIS datasets used in this study. ARR acknowledges the New Zealand goverment’s Ministry of Foreign Affairs and Trade for awarding the Pacific PhD scholarship through the NZ Aid program to undertake doctoral studies at The University of Auckland. Prof. James Terry through the Asia Oceania Geoscience Society (AOGS) is thanked for recommending a fee waiver (to MS whilst at USP) for presentation of this work at the 2013 Brisbane meeting and Dr. Russell Howorth is thanked for discussions in the early stages of the research.

References

  1. Amaranthus MP, Rice RM, Barr NR, Zeimer RR (1985) Logging and forest roads related to increased debris slides in southwestern Oregon. J For 83:229–233Google Scholar
  2. Anderson MG (1983) Road-cut slope topography and stability relationships in St. Lucia, West Indies. Appl Geography 3:104–114Google Scholar
  3. Ayalew L, Yamagishi H (2005) The application of GIS-based logistic regression for landslide susceptibility mapping in the Kakuda-Yahiko Mountains, Central Japan. Geomorphology 65:15–31CrossRefGoogle Scholar
  4. Ayalew L, Yamagishi H, Marui H, Kanno T (2005) Landslides in Sado Island of Japan: part I. Case studies, monitoring techniques and environmental considerations. Eng Geol 81:419–431CrossRefGoogle Scholar
  5. Bagoora F (1988) Soil erosion and mass wasting risk in the highland are of Uganda. Mt Res Dev 8(2/3):173–182CrossRefGoogle Scholar
  6. Baisyet PM (1993) Cyclone damage assessment of the Vaisigano watershed area. Department of Agriculture, Forests and Fisheries, Government of Samoa, United Nations Development Programme, and Food and Agriculture Organization, 15ppGoogle Scholar
  7. Barker D, McGregor DFM (1988) Land degradation in the Yallahs Basin, Jamaica: historical notes and contemporary observations. Geography 73(2):116–124Google Scholar
  8. Berryman K. (1979) Seismotectonic zoning study of the Fiji Islands. New Zealand Survey Report 70Google Scholar
  9. Catane SG, Cabria HB, Tomarong Jr CP, Saturay Jr RM, Zarco MAH, Pioquinto WC (2007) Catastrophic rockslide-debris avalanche at St. Bernard, Southern Leyte, Philippines. Landslides 4:85–90CrossRefGoogle Scholar
  10. Chen C-W, Oguchi T, Hayakawa YS, Saito H, Chen H (2017) Relationship between landslide size and rainfall conditions in Taiwan. Landslides 14:1235–1240CrossRefGoogle Scholar
  11. Cochrane GR (1969) Problems of vegetation change in western Viti Levu, Fiji. In: Gale F, Lawton GH (eds) Settlement and encounter. O.U.P, OxfordGoogle Scholar
  12. Coelho Netto A.L., Mululo Sato A., de Souza Avelar A, Vianna L.G.G., Araújo I.S., Ferreira D.L.C., Lima P.H., Silva A.P.A, Silva R.P. (2013) January 2011: the extreme landslide disaster in Brazil. In: Margottini C, Canuti P, Sassa K (eds.) Landslide science and practice: Volume 6: Risk Assessment, Management and Mitigation. Springer, 377–384Google Scholar
  13. Cooper PJM, Leakey RRB, Rao MR, Reynolds L (1996) Agroforestry and the mitigation of land degradation in the humid and sub-humid tropics of Africa. Exp Agric 32(3):235–290CrossRefGoogle Scholar
  14. Crozier MJ (2005) Multiple-occurrence regional landslide events in New Zealand: hazard management issues. Landslides 2(4):247–256CrossRefGoogle Scholar
  15. Crozier MJ, Howorth R, Grant IJ (1981) Slope stability study, Viti Levu, Fiji: a case study of the Wainitubatolu catchment. Pacific Viewpoint 22:69–80Google Scholar
  16. Crozier MJ, Howorth R, Grant IJ (1982) Landslide activity during Cyclone Wally at Fiji: a case study of Wainitubatolu catchment. Water Res J:132–139Google Scholar
  17. Cruden D.M., Varnes D.J. (1996) - Landslide types and processes. In: Turner A.K.; Shuster R.L. (eds.) Landslides: investigation and mitigation. Transportation Research Board, National Academy of Sciences, Special Report 247, 36–75Google Scholar
  18. Dai FC, Lee CF, Wang SJ (2003) Characterization of rainfall-induced landslides. Int J Remote Sens 24(23):4817–4834CrossRefGoogle Scholar
  19. Devoli G, Strauch W, Chávez G, Høeg K (2007) A landslide database for Nicaragua: a tool for landslide-hazard management. Landslides 4:163–176CrossRefGoogle Scholar
  20. Duc DM (2013) Rainfall-triggered large landslides on 15 December 2005 in Van Canh District, Binh Dinh Province, Vietnam. Landslides 10:219–230CrossRefGoogle Scholar
  21. Dykes AP (2002) Weathering-limited rainfall-triggered shallow mass movements in undisturbed steepland tropical rainforest. Geomorphology 46:73–93CrossRefGoogle Scholar
  22. Dymond JR, Ausseil A-G, Shepherd JD, Buettner L (2006) Validation of a region-wide model of landslide susceptibility in the Manawatu–Wanganui region of New Zealand. Geomorphology 74:70–79CrossRefGoogle Scholar
  23. Eijkelkamp (2012) 14.10 Pocket vane tester. Operating instructions. Eijkelkamp Agrisearch Equipment, Giesbeek, the NetherlandsGoogle Scholar
  24. Elmqvist T, Rainey WE, Pierson ED, Cox PA (1994) Effects of tropical cyclones Ofa and Val on the structure of a Samoan lowland rain forest. Biotropica 26(4):384–391CrossRefGoogle Scholar
  25. FMS (2006) The climate of Fiji. Information Sheet No. 35, Fiji Meteorological Service: Nadi, Fiji. Available at http://www.met.gov.fj (accessed 28 January 2016)
  26. Forbes K., Broadhead J. (2011) Forests and landslides. The role of trees and forests in the prevention of landslides and rehabilitation of landslide-affected areas in Asia. RAP Publication 2011/19. Food and Agriculture Organization of the United Nations Regional Office for Asia and the Pacific, BangkokGoogle Scholar
  27. Gale SJ, Rao B (2015) The stratigraphy and sedimentology of the Waindalithi Conglomerate of northeast Viti Levu, Fiji: hyperconcentrated flows and Pliocene environmental history. Aust J Earth Sci 62:1009–1020CrossRefGoogle Scholar
  28. Glade T (2003) Landslide occurrence as a response to land use change: a review of evidence from New Zealand. Catena 51:297–314CrossRefGoogle Scholar
  29. Goff J, Terry JP (2016) Tsunamigenic slope failures: the Pacific Islands ‘blind spot’? Landslides 13:1535–1543CrossRefGoogle Scholar
  30. Goudie A, Lewin J, Richards K, Anderson M, Burt T, Whalley B, Worsley P (1990) Geomorphological techniques, 2nd edn. Unwin Hyman, LondonGoogle Scholar
  31. Greenbaum D, Bowker MR, Dau I., Dropsy H, Greally KB, McDonald A, Marsh SH, Northmore KJ, O’Connor EA, Prasad S, Tragheim DG (1995) Rapid methods of landslide hazard mapping: Fiji case study. British Geological Survey, 107pp. (WC/95/028) (unpublished).Google Scholar
  32. Harmsworth G, Raynor B (2005) Cultural consideration in landslide risk perception. In: Glade T, Anderson M, Crozier M.J (eds.) Landslide hazard and risk. John Wiley & Sons Ltd, Chichester, West Sussex, England,  https://doi.org/10.1002/9780470012659.ch7
  33. Hathway, B. (1993) The Nadi Basin: Neogene strike-slip faulting and sedimentation in a fragmented arc, western Viti Levu, Fiji. Journal of the Geological Society 150 (3):563-581Google Scholar
  34. Houtz R. (1961) Minor damage caused by the Suva earthquake of June 1961. Geological Survey Department Fiji Note 94 (unpublished)Google Scholar
  35. Houtz R (1962) The 1953 Suva earthquake and tsunami. Bull Seismol Soc Am 52(1):1–12Google Scholar
  36. Howorth R, Crozier MJ, Grant IJ (1981) Effects of tropical cyclone Wally in southeast Viti Levu, easter 1980. Search 12:41–43Google Scholar
  37. Howorth R., Baleivanualala V, Prasad S. (1993) Initial reconnaissance of the effects of cyclone Kina in central and eastern Viti Levu. South Pacific applied geoscience commission (SOPAC), SOPAC Miscellaneous Report 149, 27pGoogle Scholar
  38. Howorth R, Prasad S. (1981) Morphology of typical landslides which occurred Good Friday 1980 in the Serua Hills, Viti Levu, Fiji. Fiji Mineral Resources Department, Report 28, 29pGoogle Scholar
  39. Imaizumi F, Sidle RC, Kamei R (2008) Effects of forest harvesting on the occurrence of landslides and debris flows in steep terrain of central Japan. Earth Surf Process Landf 33:827–840CrossRefGoogle Scholar
  40. Iverson RM, Reid ME, LaHusen RG (1997) Debris flow mobilization from landslides. Annu Rev Earth Planet Sci 25:85–138CrossRefGoogle Scholar
  41. Jakob M, Lambert S (2009) Climate change effects on landslides along the southwest coast of British Columbia. Geomorphology 107(3–4):275–284CrossRefGoogle Scholar
  42. Keefe O. C. (1980) Landslides in the Suva area. Fiji Mineral Resources Department, MRD Report 31, 8pGoogle Scholar
  43. Keim RF, Skaugset AE (2003) Modelling effects of forest canopies on slope stability. Hydrol Process 17(7):1457–1467CrossRefGoogle Scholar
  44. Kellman M, Hudson J (1982) Nutrition of Pinus caribaea in its native savanna habitat. Plant Soil 64(3):381–391CrossRefGoogle Scholar
  45. Kellman, M.C., Tackaberry R. (1997) Tropical environments: The Functioning and Management of Tropical Ecosystems. RoutledgeGoogle Scholar
  46. King J, Loveday I, Schuster RL (1989) The 1985 Bairaman landslide dam and resulting debris flow, Papua New Guinea. Q J Eng Geol 22:257–270CrossRefGoogle Scholar
  47. Kumar R, Stephens M, Weir T (2013a) Rainfall trends in Fiji. Int J Climatol.  https://doi.org/10.1002/joc.3779
  48. Kumar R, Stephens M, Weir T (2013b) Temperature trends in Fiji: a clear signal of climate change. South Pac J Nat Appl Sci 31:27–38Google Scholar
  49. Lamb A.F.A. (1973) Pinus caribaea. Vol 1. Fast Growing Timber Trees of the Lowland Tropics, No. 6. Commonwealth Forestry Institute, OxfordGoogle Scholar
  50. Lawson T. (1991) South-east Viti Levu landslide project. Unpublished internal report. Fiji Mineral Resources Department, SuvaGoogle Scholar
  51. Lawson T. (1993) South east Viti Levu landslide project—preliminary study. Fiji Mineral Resources Department, MRD Note BP59/2, 76pGoogle Scholar
  52. Lawson T, Dau I (1992) Landslides and rainfall in southeast Viti Levu, Fiji. Fiji Mineral Resources Department, MRD Note BP59/6, 14pGoogle Scholar
  53. Lefebvre JP, Dolique F, Gratiot N (2004) Geomorphic evolution of a coastal mudflat under oceanic influences: an example from the dynamic shoreline of French Guiana. Mar Geol 208:191–205CrossRefGoogle Scholar
  54. Leslie D.M. (1997) An introduction to the soils of Fiji. Soil and crop evaluation project, Research Division, Ministry of Agriculture, Fisheries and ALTA, Nausori, FijiGoogle Scholar
  55. Louat R, Pelletier B (1989) Seismotectonics and present-day relative motions in the New Hebrides-North Fiji Basin region. Tectonophysics 167:41–55CrossRefGoogle Scholar
  56. Magliulo P, Di Lisio A, Russo F (2009) Comparison of GIS-based methodologies for the landslide susceptibility assessment. GeoInformatica 13:253–265CrossRefGoogle Scholar
  57. Malo M. (2012) Landslide threat. Fiji Times newspaper article published 12 February 2012Google Scholar
  58. Mikoš M., Yin Y., Sass K. (2017) The fourth World Landslide Forum, Ljubljana, 2017. Landslides, 1–12. doi  https://doi.org/10.1007/s10346-017-0889-5.
  59. Mizuyama T (2008) Structural countermeasures for debris flow disasters. Int J Erosion Control Eng 1(2):38–43CrossRefGoogle Scholar
  60. Montgomery DR (1994) Road surface drainage, channel initiation, and slope instability. Water Resour Res 30:1925–1932CrossRefGoogle Scholar
  61. Morrison R.J., Clarke W.C., Buresova N., Limalevu L. (1990) Erosion and sedimentation in Fiji- an overview. In: Research needs and applications to reduce erosion and sedimentation in tropical steeplands. Proceedings of the Fiji Symposium, June 1990, IAHS-AISH Pub. No. 192, 14–23Google Scholar
  62. Neall VE, Trewick SA (2008) The age and origin of the Pacific Islands: a geological overview. Special issue: evolution on Pacific Islands: Darwin’s legacy. Philos Trans: Biol Sci 363(1508):3293–3308CrossRefGoogle Scholar
  63. Nicoll BC, Gardiner BA, Rayney B, Peace AJ (2006) Anchorage of coniferous trees in relation to species, soil type and rooting depth. Can J For Res 36:1871–1883CrossRefGoogle Scholar
  64. Nieto V.M., Rodriguez J. (2003) Tropical tree seed manual. Part II Species Descriptions - Pinus caribaea Morelet. Corporacion Nacional de investigación of Santaf’e de Bogote ColombiaGoogle Scholar
  65. Nunn PD (1990) Recent environmental change on Pacific islands. Geogr J 156(2):125–140CrossRefGoogle Scholar
  66. Nunn P.D. (1994) Oceanic islands. Wiley-BlackwellGoogle Scholar
  67. Nunn PD (1998) Pacific Island landscapes: landscape and geological development of Southwest Pacific Islands, especially Fiji. Samoa and Tonga, Institute of Pacific StudiesGoogle Scholar
  68. Nunn PD, Ollier C, Hope G, Rodda P, Omura A, Peltier WR (2002) Late Quaternary sea-level and tectonic changes in northeast Fiji. Mar Geol 187:299–311CrossRefGoogle Scholar
  69. Ollier CD, Terry JP (1999) Volcanic geomorphology of northern Viti Levu, Fiji. Aust J Earth Sci 46:515–522CrossRefGoogle Scholar
  70. PCCSP (2011) Climate change in the Pacific: scientific assessment and new research. Volume 2: Country Reports. Pacific Climate Change Science Program (Australian Bureau of Meteorology and CSIRO) Melbourne. www.pacificclimatechangescience.org
  71. Peart M (1991) The Kaiapit landslide: events and mechanisms. Q J Eng Geol 24:399–411CrossRefGoogle Scholar
  72. Ram A. R. (2013) Rainfall, runoff events and fluvial sediment delivery patterns in a small forested coastal watershed in southern Viti Levu, Fiji Islands. Unpublished MSc Thesis, School of Geography, Earth Science and Environment, University of the South PacificGoogle Scholar
  73. Ratiram A. (2013) Investigating the braided system of the Jourdain River, Espiritu Santo, Vanuatu. Unpublished MSc thesis, School of Geography, Earth Science and Environment, University of the South PacficGoogle Scholar
  74. Reichenbach P, Busca C, Mondini AC, Rossi M (2014) The influence of land use change on landslide susceptibility onation: the Briga catchment test site (Messina, Italy). Environ Manag 54:1372–1384CrossRefGoogle Scholar
  75. Rickli C, Graf F (2009) Effects of forests on shallow landslides—case studies in Switzerland. For Snow Landsc Res 82(1):33–44Google Scholar
  76. Robbins JC, Petterson MG, Mylne K, Espi JO (2013) Tumbi landslide, Papua New Guinea: rainfall induced? Landslides 10:673–684CrossRefGoogle Scholar
  77. Rodda P (1967) Outline of the geology of Viti Levu. N Z J Geol Geophys 10(5):1260–1273CrossRefGoogle Scholar
  78. Rodda P. (1994) Geology of Fiji. In: Stevenson, A.J., Herzer, R.H., Ballance, P.F. (eds.) Geology and Submarine Resources of the Tonga-Lau-Fiji Region. SOPAC technical bulletin 8, 131–151Google Scholar
  79. Salinger MJ, Basher RE, Fitzharris BB, Hay JE, Jones PD, Macveigh JP, Schmidely-Leleu I (1995) Climate trends in the south-west Pacific. Int J Climatol 15:285–302CrossRefGoogle Scholar
  80. Santi PM, Hewitt K, VanDine DF, Barillas Cruz E (2011) Debris-flow impact, vulnerability, and response. Nat Hazards 56:371–402CrossRefGoogle Scholar
  81. Selby MJ (1976) Slope erosion due to extreme rainfall: a case study from New Zealand. Geografiska Annaler Ser A Phys Geogr 58(3):131–138CrossRefGoogle Scholar
  82. Seru VB, Leslie, DM (1986) Soil map of Fiji. Scale 1:50,000. Land Use Section, Land Resource Planning and Development Division, Ministry of Primary Industries, FijiGoogle Scholar
  83. Swanson FJ, Dyrness CT (1975) Impact of clearcutting and road construction on soil erosion by landslides in the western Cascade Range. Or Geol 3:393–396CrossRefGoogle Scholar
  84. Terry JP (2007) Tropical cyclones: climatology and impacts in the South Pacific. Chapter 8 Slope stability and mass movements. Springer, New YorkGoogle Scholar
  85. Terry J.P. (2011) Hydrology and fluvial geomorphology. In: Bouchet P, Le Guyader H, Pascal O. (Eds) The Natural History of Santo. MNHN, Paris; IRD, Marseille; PNI, Paris. 572 p. (Patrimoines naturels; 70), p. 46–51Google Scholar
  86. Terry JP, Raj R (1999) Island environment and landscape responses to 1997 tropical cyclones in Fiji. Pac Sci 13:257–272Google Scholar
  87. Toll D.G., Jotisankasa A., Rahardjo H., Kulsawan B. (2008) Studies of rainfall-induced landslides in Thailand and Singapore. In: Toll, D.G., Augarde, C.E., Gallipoli, D., Wheeler, S.J. (eds.) Unsaturated Soils. Advances in Geo-Engineering (Chapter 125). Proceedings of the 1st European Conference, E-UNSAT 2008, Durham, United Kingdom. Taylor & Francis, 901–907, doi:  https://doi.org/10.1201/9780203884430.ch125.
  88. Trustrum N.A., Whitehouse I.E., Blaschke P.M. (1989) Flood and landslide hazard, Northern Guadalcanal, Solomon Islands. Department of Scientific and Industrial Research, New Zealand. Unpublished report for United Nations Technical Cooperation for Development, New York, 6/89 SOI/87/001.43Google Scholar
  89. Trustrum NA, Whitehouse IE, Blaschke PM, Stephens PR (1990) Flood and landslide hazard mapping, Solomon Islands. In: Ziemer RR, O’Loughlin CL, Hamilton LS (eds) Research needs and applications to reduce erosion and sedimentation in tropical steeplands. International Association of Hydrological Sciences, publication no 197, pp. 138–146Google Scholar
  90. Tsou C-Y, Feng Z-Y, Chigira M (2011) Catastrophic landslide induced by typhoon Morakot, Shiaolin, Taiwan. Geomorphology 127:166–178CrossRefGoogle Scholar
  91. Twyford IT, Wright ACS (1965) The soil resources of the Fiji Islands. Department of Agriculture, Suva, FijiGoogle Scholar
  92. Victor S, Neth L, Golbuu Y, Wolanski E, Richmond RH (2006) Sedimentation in mangroves and coral reefs in a wet tropical island, Pohnpei, Micronesia. Estuar Coast Shelf Sci 66(3–4):409–416CrossRefGoogle Scholar
  93. Wang W-D, Guo J, Fang L-G, Chang X-S (2012) A subjective and objective integrated weighting method for landslides susceptibility mapping based on GIS. Environ Earth Sci 65:1705–1714CrossRefGoogle Scholar
  94. Waqanisau, S., Seru, M. (2012) Landslide reconnaissance and preliminary report Lololo Pine Station, Drasa, Lautoka. Fiji Mineral Resources Department, Geological Survey Division, 9ppGoogle Scholar
  95. Waterloo, M. J., Beekman, F.J., Bruunzeel, L.A., Frumau, K.F.A., Harkema, E., Opdam, H.J., Schellekens, J., Vugts, H.F., Rawaqa, T.T. (1993) The impact of converting grassland to pine forest on water yield in Viti Levu, Fiji. Hydrology of Warm Humid Regions (Proceedings of the Yokohama Symposium, July 1993). IAHS Publ no 216., 149–156Google Scholar
  96. Waterloo MJ, Schellekens J, Bruijnzeel LA, Rawaqa TT (2007) Changes in catchment runoff after harvesting and burning of a Pinus caribaea plantation in Viti Levu, Fiji. For Ecol Manag 251:31–44CrossRefGoogle Scholar
  97. Whippy F, Rao B (1986) Korolevu Post Office landslide: April 1980. Fiji Mineral Resources Department, MRD Note BP 39/12, 5pGoogle Scholar
  98. Williams, T. (1858) Fiji and the Fijians. Vol. I. The islands and their inhabitants. Edited by Rowe, G.S. London: Alexander Heylin, 28, Pasternoster RowGoogle Scholar
  99. Yeo SW, Blong RJ, Mcaneney KJ (2007) Flooding in Fiji: findings from a 100-year historical series. Hydrol Sci J des Sci Hydrologiques 52(5):1004–1015CrossRefGoogle Scholar

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Authors and Affiliations

  1. 1.Department of Environmental Science, Faculty of ScienceUniversity of BotswanaGaboroneBotswana
  2. 2.School of Geography, Earth Science and Environment, Faculty of Science, Technology and EnvironmentThe University of the South PacificSuvaFiji
  3. 3.School of People, Environment and Planning, College of Humanities and Social SciencesMassey UniversityPalmerston NorthNew Zealand
  4. 4.School of Environment, Faculty of ScienceThe University of AucklandAucklandNew Zealand

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