arid Australia blue clouds country diminishing distance distant environment environmental erosion freshwater ground ground-water lake lake-side land landscape limited natural-environment natural-landscape outback patterns receding rural sand shrinking sky Soil surface surfaces texture textured textures trees vegetation water water-resources wetland reflections abstract background fresh illustration reflection ripple sea summer concept drop fast park stream time flow fountain ridges wet pool shine waves river shadows afloat floating green leaves lilly pad peaceful still tranquil water lillies appearance cold cool growth hail hailstones ice path pathway pavestones paving scattered scattering shapes Sizes surfaced surfacing thick thin weeds white