Confined flow in a Cylindrical aquifer. The flow is 1D from left to right as shown by the piezometric «surface» (line in this case).

Flow in a confined aquifer. Note the piezometric surface above the top of the aquifer.

Unconfined flow in an experimental aquifer composed of 3mm beads

Visualisation of flow during pumping in an unconfined aquifer.

Unconfined groundwater flow in and experimental aquifer composed of 4mm glass beads. Flow from right to left

Bayanbulak Grassland, Xinjiang, China

Transition from a braided to meandering morphology in the Bayanbulak Grassland, Xinjiang, China.

Channel cross section of a secondary sand channel of the Kosi River, Kosi Fan, Bihar, India

Lacey's law compared to the threshold theory, for natural rivers (gray) and laboratory rivers (green). See Reference

Lacey's law and threshold theory in laboratory experiments. Green: single-thread channels; blue: threads from braided rivers. Red line corresponds to the threshold theory. See Reference

Meandering River, Bayanbulak Grassland, Xinjiang, China

Large amplitude meanders of the Kaidu River in the Bayanbulak Grassland, Xinjiang, China.

Oxbow Lake cut by the Kaidu River in a vegetalized dune field, Bayanbulak Grassland, Xinjiang, China

Sapping channel, Bayanbulak Grassland, Xinjiang, China

Trace of recirculation cells in a secondary sand channel of the Kosi River, Kosi Fan, Bihar, India

Urumqi River near the Glacial Station of the Chinese Academy of Sciences, Summer 2006, Houxia, Xinjiang, China.

Total flux of mass, both dissolved and solid, measured in the Urumqi River during the summer of 2005. see reference

Glacial Valley of the Urumqi River, summer 2005, Tianshan China.

Braided Kosi near Nirmali bridge at low flow (May 2012)

Saping process and gully formation on the west embankment of Kosi river near Nirmali bridge.

Incised meander of the Hutubi river in Tianshan. strath terraces on the left bank

Braided Urumqi river bed. View to the north at the Bogda shan. Terraces on the sides. Nov 2008.

Meander cutoffs on the Rio Mamore, Bolivia, 2001

On the mamore near Guayaramerin

Tributary of the Urumqi river (originates from ground water sapping) entranched into the holocene terraces and forming a fan at the confluence

Barchane dunes in the Shanshan sand field, Xinjiang.