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Relating leaf area index of natural eucalypt vegetation to climate variables in southern Australia

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  • Ellis, T.W.
  • Hatton, T.J.

Abstract

We address a need for a rapid technique to estimate the leaf area index (LAI) of pre-existing natural vegetation. This is required to determine the effects of agroforestry plantings on deep drainage from agricultural land. Previous work shows: (1) a relationship between the hydrologic 'footprint' of tree belts and their lineal leaf area (leaf area per metre of belt, LLA, m2 m-1), relative to the LAI of natural vegetation and (2) that the LAI of natural vegetation is related to plant-available soil moisture and climate. We evaluated relationships between LAI measured at 37 sites across southern Australia and (1) annual average rainfall, P; (2) annual average pan evaporation, E0; (3) 'available rainfall'--annual average rainfall, P, minus annual average pan evaporation, E0; (4) a climate wetness index P/E0; (5) Specht's soil evaporative index, k = 0.0045 + 71.57/E0. P was the best indicator for the data set used, i.e. LAI = 0.003P + 0.41 (r2 = 0.80).

Suggested Citation

  • Ellis, T.W. & Hatton, T.J., 2008. "Relating leaf area index of natural eucalypt vegetation to climate variables in southern Australia," Agricultural Water Management, Elsevier, vol. 95(6), pages 743-747, June.
    • Handle: RePEc:eee:agiwat:v:95:y:2008:i:6:p:743-747
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    References listed on IDEAS

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    1. Ellis, Tim & Hatton, Tom & Nuberg, Ian, 2005. "An ecological optimality approach for predicting deep drainage from tree belts of alley farms in water-limited environments," Agricultural Water Management, Elsevier, vol. 75(2), pages 92-116, July.
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    Cited by:

    1. V. Phogat & N. J. Potter & J. W. Cox & J. Šimůnek, 2017. "Long-Term Quantification of Stream-Aquifer Exchange in a Variably-Saturated Heterogeneous Environment," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(13), pages 4353-4366, October.

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