LPB

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LPB HYPEApplication of the HYPE model in the
La Plata BasinJohan Strömqvist, Berit Arheimer,
Joel Dahné, Chantal Donnelly, Jörgen Rosberg, Wei
Yang_at_ Swedish Meteorological and Hydrological
Institute
The HYPE model (Hydrological Predictions for the
Environment)

• A new daily time-stepping hydrological model for
  small-scale and large-scale assessments of water
  resources and water quality has been developed at
  the SMHI. In the model the landscape is divided
  into classes according to soil type, vegetation
  and altitude. Soils are divided into 1-3 layers
  and the model simulates surface runoff, macropore
  flow, tile drainage and groundwater outflow from
  the individual soil layers. Rivers and lakes are
  described separately. Parameters in the model are
  either general or related to soil type or land
  use.

The La Plata Basin application

• La Plata Basin was modelled with HYPE. Sub-basins
  were automatically delineated using information
  from the Hydro1k database (USGS 2000). ERA40 data
  was used as driving data (temperature and
  precipitation) and the ECOCLIMAP (Champeaux et
  al. 2005) database was used to obtain landuse and
  soil information. The model over-estimates
  discharge in the western mountainous part of the
  basin, mainly due to too high precipitation
  signal from ERA40. Within the CLARIS project
  local data will be included in the model setup to
  improve the results.
• Scope for improvements
• Improved precipitation data
• Evapotranspiration
• Regulation strategies of reservoirs
• Wetland dynamics
• Soil characteristics

Example of input data to the model
First results from La Plata simulations
Paraná (Station Timbues)
Overestimation due to ERA40 precipitation!
Climate change impact
When calibrated and validated for present
climate, the model will be used to analyse
climate change impact on hydrological variables.
The signal from climate models (RCMs) will be
adjusted to relevant scale and an ensemble of
climate results will be used. Interesting
hydrological variables in a future climate to be
analysed could be soil moisture, low and high
flow conditions, and wetland dynamics.
References Champeaux, J.L., Masson, V. Chauvin,
F. (2005). ECOCLIMAP a global databaseof land
surface parameters at 1 km resolution. Meteorol.
Appl. 12, 29-32. USGS (2000) Hydro1k (available
online at http//edc.usgs.gov/products/elevation/g
topo30/hydro/index.html