Journal - Palaeohydrological reconstruction of Siwalik Group in Surai Khola section of west Nepal Himalaya

Palaeohydrological reconstruction of Siwalik Group in Surai Khola section of west Nepal Himalaya

Prakash Das Ulak

Department of Geology, Tri–Chandra Campus,

Tribhuvan University, Kathmandu, Nepal

Jour. Nep. Geol. Soc., Vol. 31, 2005, 33-42


Abstract

About 5 km thick Neogene Siwalik Group in the Surai Khola section of west Nepal comprises many fining-upward cycles, which are from several metres to tens of metres thick. However, the Siwalik sequence as a whole reveals a coarsening upward trend. The palaeohydrological reconstruction of the Siwalik Group was based mainly on two parameters: the sediment grain size and the thickness of individual fining-upward successions. The estimated palaeoflow velocity in the Siwalik Group varies from 0.32 to 4.76 m/s, palaeochannel gradient ranges from 5.29x10-5 to 9.59x10-4 m/m, and palaeodischarge fluctuates from 1 to 104 m3/s, in the stratigraphically upward direction. These palaeohydrological parameters indicate a gradual change in fluvial system, presumably owing to the southward propagation of thrusts.

Member Login
NEWS AND EVENTS
  • May
    21

    Nepal Geological Society has organized a press meeting on the memory of 2015 Gorkha Earthquake on 2075/1/12 at the conference hall of Department of Irrigation, Jawalakhel

  • Feb
    06

    Nepal Geological Society organized a one day workshop on Earthquake Safety Day-2074 in 2074/10/13 at the conference hall of the United World Trade Center, Tripureshwor, Kathmandu, Nepal in association with Private and Boarding School Association Nepal (BAPSON Kathmandu Province).

Activities and Information

Activities of 17th and 18th Executive Committee
Nepal Geological Society
P.O.Box No. 231
Kathmandu, Nepal
FREEPHONE: +977-01-4437874
Email: info@ngs.org.np