Chukhung GlacierToday’s Chukung Glacier is only a small remnant, 2.5 km long, of a large glacier that descended from the Ombigaichen ridge. For us, the main interest was that this glacier once had a moraine-dammed lake that was breached prior to 1962, although with little negative impact downstream. The lake floor is of particular interest sedimentologically, as is the breach itself and the boulder fan below it. The GLOF from this glacier has been described and numerically modelled by Westoby et al. (2014). | |||
 Overview of the breached moraine of Chukhung Glacier, the remnants of which are visible top left on the ridge between Ombigaichen and Ama Dablam. |  The breach in the Little Ice Age moraine with the debris fan below. The height of the breach is about 100 m. |  Chukhung Glacier has receded considerably up the steep hillside. Its surface is relatively free of debris, and an ice avalanche cone has developed below it. |  Inside the breached moraine, the floor of the former lake basin is exposed, and new fluvial processes are reworking the sediment. |
 Also remaining in the former lake basin are hummocky moraines, with dead glacier ice beneath. |  The inside wall of the Little Ice Age moraine showing the sandy gravel with large boulders that characterize such moraines. |  Laminated sand, silt and gravel – typical of the former lake deposits. |  Boulders in glaciofluvial sediment inside the moraine, left behind as the ice dam drained rapidly. |
 A boulder train on the outside of the Little Ice moraine. The stable surface is now grass-covered. |  The debris fan with gravel and boulders just below the breach, sorted by the outburst flood, and showing the power of such floods in transporting debris. |  One feature of an outburst flood is a boulder jam, where on boulder becomes lodged and others pile up behind it. |  View down-valley of the debris-fan produced by the outburst flood, where it passed through the moraines of Ama Dablam Glacier. |
| Photos Michael Hambrey, April-May, 2003 | |||