Kakadu Case Study

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Computer Modelling undertaken Specific Models for these locations • Freshwater catchment Influenced by rainfall / runoff only • Tidal Interface Influenced by both rainfall / runoff and sea level rise • Floodplain Influenced by both rainfall / runoff and sea level rise • Lower estuary Influenced by sea level rise Impacts - Rainfall Complex rainfall +/- • +/- 10% by 2030 to +/- 20% by 2070 • Runoff and sediment supply proportional • Data reduced to number of days wet and dry for risk analysis Increased flows and velocities • Increased channel width / velocity • Increased inception of dendritic channels • But decreased length of dry season may impact veg/soils Decreased flows and velocities • Decreased channel width / velocity • Decreased inception of dendritic channels • But increased length of dry season may impact veg/soils
Impacts – Sea Level Rise (SLR) Assumptions • SLR is transmitted to tidal interface • Lower estuary contained in channel • Floodplain level set at 5mAHD from GA data Increased tidal pressure • SLR => 143mm by 2030 to 700mm by 2070 (on top of 6m tide +) • Storm surge increase ~ 0.15m Increased levee overtopping 60% by 2030 and 400% by 2070 Increased saline intrusion on floodplain • Levee overtopping • Dendritic channel threat to billabongs Increased tidal flows and velocities – increased channel cross section – pressure on tidal head Tourism Mining Health and Safety Ecology Adaptation options Promote new tourism at existing sites Open new sites Replicate sites and/or create ‘Living Museum’ Maintain access to priority sites Maintain infrastructure at priority sites Manage crocodile numbers and minimise human contact Maintain World Heritage listing Rehabilitate past mining facilities Upgrade infrastructure for proposed mines Prevent introduction of tropical diseases Develop incidence response plan Upgrade safety communication Educate visitors and residents and businesses Manage extractive uses for the Park Manage key ecological sites to build resilience Structural protection of priority sites Transport and Communication Develop alternative forms of transport into and within Park Construct all weather road access
Page 1 and 2: Kakadu National Park Case study An
Page 3 and 4: Unique biodiversity Wetlands
Page 5 and 6: Cultural anthropological significan
Page 7: Potential impacts of climate change

Kakadu Case Study

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