地理漫步·世界地理英语30篇（4）

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墨累-达令盆地：压力下的澳大利亚粮仓

Australia’s largest river system drains one-seventh of the continent yet supports 40% of its agricultural output.
Overallocation of water licenses led to unsustainable extractions, especially during multi-year droughts.
Native river red gums depend on periodic flooding—now disrupted by upstream dams and weirs.
Salinity rose sharply as irrigation drew groundwater, bringing dissolved salts to the surface.
The Murray-Darling Basin Plan sets binding limits on water use and funds environmental water buys.
Aboriginal groups co-manage cultural flows—water allocations honoring spiritual and ecological needs.
Farmers adopt laser-guided leveling and soil moisture sensors to optimize irrigation timing.
River red gum forests provide nesting hollows for endangered glossy black cockatoos.
Climate projections show winter rainfall declining 15% by 2050, intensifying summer evaporation.
Citizen scientists monitor frog calls and waterbird counts to track wetland recovery progress.