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Hydrology

Hydrology

22 items

Two rivers meeting in a mountain valley: clear turquoise water on the left and muddy light brown water on the right flow side by side with a sharp foamy boundary, beside a gravel bar and steep slopes. — Muk su + Qezel su => Surkhob Hossein Barkhordari

View at dusk over a river curving through an old city, with a tall stone bell tower, a stone arched bridge, a domed church and a construction crane under a pink sky, framed by dark tree branches. — ° Following the Adige River, Wherever I go ° Roshanak Tootoonchi

Composite of two photos with altered blue-green colours: a small instrument boat tethered by a rope floats on a flowing river below a footbridge where a person stands, light and dark specks scattered on the water. — LSPIPhone - iPhone HDR Nick Everard

Close-up of a row of green ivy leaves covered in raindrops, growing along the ground among wet brown fallen leaves and twigs. — A wet understory plant John Van Stan

Dark cave with a clear green underground pool lit by headlamps, a person in a helmet on each side holding a rope that pulls a small floating instrument across, another watching from a rock. — Field work as a karstologist Cyril Mayaud

Person crouching with a tripod-mounted instrument at the edge of a round brown pool in a sinkhole, in a flat barren landscape of pale mud and salt, with a sea on the horizon. — A study of sinkholes in the former bed of the Dead Sea, Jordan. Eoghan Holohan

View from a wooded clifftop down a broad river winding through a steep forested gorge with pale rock outcrops and early autumn colours, a small white passenger boat on the water. — Europe's second longest river Thiago Massao Inagaki

Calm blue lake with a white passenger boat, a wooded hill with houses on the left shore and forested mountains beyond under a blue sky with wispy clouds. — Blue lake in the Bavarian Alps Thiago Massao Inagaki

Shafts of golden morning sunlight streaming through misty conifer and beech trunks onto a sloping forest floor of dry leaves and a moss-covered fallen log. — Early Morning Fieldwork in Sihlwald, Switzerland Simon Etter

Misty forest of tall dark trunks lit by slanting beams of low sunlight, with a path on the left and a slope of glowing red-orange leaves on the right. — Early Morning Fieldwork in Sihlwald Simon Etter

Shallow clear stream winding through yellow-green grass and grey boulders on a rocky upland, fading into thick fog. — Persuasive calmness of headwater streams Nilay Dogulu

Close-up of a cave flowstone formation with pale glistening ribs draped over orange-brown hollows, like folds of a curtain, with a blurred orange background. — Stomach of the Earth Anton Chupilko

Slender white stalagmite tapering to a point, its surface knobbly and tiered, in front of a blurred brown cave wall with white stalactites hanging from the ceiling at top left. — Doing era Anton Chupilko

Silhouette of a person with a rifle on their back walking through a dark ice tunnel with scalloped glassy walls towards a bright opening filled with snow drifts. — Into the dark 2: exploring englacial conduits in Svalbard Evan Miles

Line of people wearing headlamps walking in silhouette along a dark ice tunnel, its rippled scalloped walls lit blue-white by a bright opening ahead. — Into the dark 1: exploring englacial conduits in Svalbard Evan Miles

Coastal town of high-rise apartment blocks, including one large curved building, filling the slope of a hill beside a bay with a sandy beach and a jetty. — How to break water and sediments connectivity Antonio Jordán

Black-and-white close-up of a lump of white ice with clear dripping icicles on a stone, beside blurred silky water cascading over dark boulders. — Mountain stream in winter Daniele Penna

Small weather station instrument on a tripod standing on a rocky ledge, overlooking a deep green alpine valley with a river and forest, between steep grey mountain walls and peaks. — Alpine Meteorology James Thornton

Three people working at dusk around field instruments on a sandy surface: two bend over cable-linked white boxes while a third watches, with an orange measuring wheel beside them. — Final effort Patrick Klenk

Silhouette of a person bending over equipment at dusk beside instrument boxes and poles, with dark trees and an orange and red band of sunset sky behind. — True enthusiasm Patrick Klenk

Flooded forest of bare birches and other trees standing in still, murky water, with uprooted trees, fallen trunks and floating branches reflected on the surface. — Beavers millpond Denis Zhilin

Close-up of round water drops sitting on dry, dusty soil with small pebbles, the beads staying on the surface without soaking in. — Repellence two years after wildfire. Diana Vieira

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