Field-based hydro-meteorological observations and monitoring

A comprehensive hydrological and meteorological observation system is a prerequisite for assessing the impacts of climate change on the hydrological regimes of mountain catchments, high-altitude catchments, and glacier-fed catchments. 

The purpose of this component is to strengthen hydrological and meteorological observations in the high-altitude Himalayan region of Nepal, to develop capacity in generating essential data for running and implementing hydrological models, and to assess current and future water availability scenarios.

The activities under this component include

  • Meteorological monitoring through automatic weather stations installed mostly in Langtang valley, Nepal, to collect much-needed high-altitude baseline glacier climate data: wind speed, air temperature, humidity, solar radiation, and glacier surface height changes due to snow deposition or ice/snow melt.
  • Stream flow discharge monitoring to understand the hydrological regimes of glacier-fed catchments. 
  • Snow height and snow water equivalent in-situ monitoring coupled with snow melt models validated with collected data, which helps to study the contributions of snow melt to water runoff in a given catchment.
  • Modeling future changes in stream flow discharge due to future glacier evolution.  

Photo: Jitendra Raj Bajracharya/ICIMOD