Lightning Lecture AMOS Annual Meeting and International Conference on Tropical Meteorology and Oceanography

Identifying Drought Resilience in Eastern Australia (#2039)

Abraham J Gibson 1 , Danielle C Verdon-Kidd 1 , Gregory R Hancock 1
  1. University of Newcastle, Callaghan, NSW, Australia

A key focus of developing effective drought management practices is maintenance and protection of resources during periods of climate stress, and promoting quick recovery when relief occurs; i.e. being resilient to drought. Anecdotal evidence suggest that some regions of Australia are more ‘drought resilient’ than others.  One of these regions is the high rainfall zone of eastern Australia (i.e. east of the Great Dividing Range), which displays a lower degree of interannual climate variability than west of the divide. However, to determine which regions are most resilient requires quantification of drought propagation throughout a catchment, and, the subsequent catchment response and recovery. Therefore, this study aims to measure the response to drought of two agricultural catchments in the eastern Australia high rainfall zone. The analyses are underpinned by the Scaling and Assimilation of Soil Moisture And Streamflow (SASMAS) field-measured soil moisture dataset and remote sensed vegetation data. It is shown that during drought periods vegetation stress increased while soil moisture declined, however, both recovered quickly and displayed small variation between drought and non-drought periods. As a result, the catchments may be considered resilient to drought; with specific catchment characteristics playing a role in this. The study diversifies traditional approaches to studying droughts by quantifying catchment response to drought. This highlights the potential to use similar techniques to better understand drought resilience in other catchments in Australia and globally. This is a key step towards better drought management and reducing the impacts of drought globally.