en
Scientific article
Open access
English

Streamflow Modeling in a Highly Managed Mountainous Glacier Watershed Using SWAT: The Upper Rhone River Watershed Case in Switzerland

Published inWater resources management, vol. 27, no. 2, p. 323-339
Collection
  • Open Access - Licence nationale Springer
Publication date2013
Abstract

Stream flow simulation is often challenging in mountainous watersheds because of irregular topography and complex hydrological processes. Rates of change in precipitation and temperature with respect to elevation often limit the ability to reproduce stream runoff by hydrological models. Anthropogenic influence, such as water transfers in high altitude hydropower reservoirs increases the difficulty in modeling since the natural flow regime is altered by long term storage of water in the reservoirs. The Soil and Water Assessment Tool (SWAT) was used for simulating stream flow in the upper Rhone watershed located in the south western part of Switzerland. The catchment area covers 5220 km2, where most of the land cover is dominated by forest and 14 % is glacier. Stream flow calibration was done at daily time steps for the period of 2001–2005, and validated for 2006–2010. Two different approaches were used for simulating snow and glacier melt process, namely the temperature index approach with and without elevation bands. The hydropower network was implemented based on the intake points that form part of the inter-reservoir network. Sub-basins were grouped into two major categories with glaciers and without glaciers for simulating snow and glacier melt processes. Model performance was evaluated both visually and statistically where a good relation between observed and simulated discharge was found. Our study suggests that a proper configuration of the network leads to better model performance despite the complexity that arises for water transaction. Implementing elevation bands generates better results than without elevation bands. Results show that considering all the complexity arising from natural variability and anthropogenic influences, SWAT performs well in simulating runoff in the upper Rhone watershed. Findings from this study can be applicable for high elevation snow and glacier dominated catchments with similar hydro-physiographic constraints.

Keywords
  • SWAT
  • Snow melt
  • Glacier melt
  • Hydropower
  • AMALGAM
Funding
  • European Commission - Assessment of climatic change and impacts on the quantity and quality of water [212250]
Citation (ISO format)
RAHMAN, Kazi et al. Streamflow Modeling in a Highly Managed Mountainous Glacier Watershed Using SWAT: The Upper Rhone River Watershed Case in Switzerland. In: Water resources management, 2013, vol. 27, n° 2, p. 323–339. doi: 10.1007/s11269-012-0188-9
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal0920-4741
831views
379downloads

Technical informations

Creation11/19/2012 9:25:00 PM
First validation11/19/2012 9:25:00 PM
Update time03/14/2023 5:45:26 PM
Status update03/14/2023 5:45:26 PM
Last indexation01/16/2024 12:32:28 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack