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Runoff modeling of a river basin with a debris-covered glacier in Langtang Valley, Nepal Himalaya

1996; Volume: 14; Issue: 14 Linguagem: Inglês

0913-4190

Birbal Rana, Yoshihiro Fukushima, Yutaka Ageta, Masayoshi Nakawo,

Arctic and Antarctic ice dynamics

A conceptual runoff model is used to simulate the daily runoff from 67% glacierized basin of Lirung Khola. To estimate the melt from the debris-covered areas of the glacier, a simple calculation requiring global radiation, air temperature and albedo of debris-free ice and critical thermal resistance is introduced in the model. The sensitivity of the albedo and the thickness of the debris -cover are tested; the calculations with the albedo of 0.1 and 0.2 resulted in similar daily discharge. Under the assumption of the debris thickness 0.5-1 m, simulated results agreed fairly well with the observed discharge.