Cheers MikeB, Rambaldi and DivePirate.
[Riverina weather report]
Last week it was snowing, few days ago it was sweltering 34C and in a few days ...snowing.
The Riverina is Australia's 'Food Bowl' and has 100 years of Irrigation fame. Canals are everywhere. Alas, they are muddy brown with -3cm viz (deduct space between eyes and mask) and dangerous in regards to 'suctioning' between sections, strong current and snakes. Some canals are dug to the size of 3-lane Freeways. I currently work for Sunrice Australia and there are rice fields aplenty out here. Of course Droughts can dry up even this region, but the area looks as green as the North Island with all the (La Nina) rains ...it even flooded for the first time in 42 years and the Canals certainly helped allieviate what would have been an immense floodplain which is common around most of Australia when it floods. Alas it didn't flood 'deep' enough for me to 'dive' anywhere.