DOI: 10.16904/envidat.69
title: Hydro-CH2018 reservoirs

description: The dataset Hydro-CH2018 reservoirs provides estimates of current and future water supply, water demand, and storage volumes for 307 medium-sized catchments in Switzerland. 
Water supply for current (1981-2010) and future (2070-2099) climate conditions was simulated using the hydrological model PREVAH. For modeling current water supply, observed meteorological time series were used as input, while simulated meteorological time series derived from 39 model chains of the CH2018 initiative were used as an input for simulating future climate conditions.
Water demand was estimated for six categories: 
- 1) Drinking water (households and tourism),
- 2) industry (second and third sector), 
- 3) artificial snow production, 
- 4) agriculture (irrigation and livestock feeding), 
- 5) ecology (residual flows), and 
- 6) hydropower.
Future estimates consider changes in demand related to population growth and changes in the hydrological conditions.
Storage volumes are provided for natural lakes (storage capacities and usable volumes), artificial reservoirs, reservoirs for artificial snow production, and drinking reservoirs.
A detailed description of the simulation and estimation procedures can be found in 
* Brunner, M.I., Björnsen Gurung, A., Zappa, M., Zekollari, H., Farinotti, D., Stähli, M., 2019. Present and future water scarcity in Switzerland: Potential for alleviation through reservoirs and lakes. Sci. Total Environ. 666, 1033–1047. https://doi.org/10.1016/j.scitotenv.2019.02.169.
This dataset contains the following information:
1. Shapefile with the 307 medium-sized Swiss catchments.
2. Textfiles with the water supply simulations for the control run and the 39 climate model chains (one file per chain) at daily resolution for the 307 catchments.
3. Textfiles with the current and future demand estimates per category at monthly resolution for the 307 catchments.
4. Textfiles with the storage volumes per category and catchment.
description: Resource Title: Shapefile of 307 catchments in Switzerland
 Size: 100341 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/3fc83159-6e65-47f9-9fd8-dd60f749fda4/resource/b30c2b9e-71f9-4798-b841-104a58d79667/download/shapefile_307_regions.zip
 Description: Shapefile of 307 catchments for which estimates of water supply, demand, and reservoir volumes are provided. The OBJECTID entry corresponds to the catchment ID which is used as a reference in the other datasets provided.
description: Resource Title: Reservoir volumes
 Size: 7781 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/3fc83159-6e65-47f9-9fd8-dd60f749fda4/resource/d601bc26-6f1a-46a3-9ccd-603fca11920b/download/reservoirs.zip
 Description: Reservoir volume for the 307 medium-sized catchments for different storage categories: natural lakes, artificial reservoirs, reservoirs for artificial snow production, drinking water reservoirs, and usable volumes of natural lakes. Unit: Mio m<sup>³</sup>. One column per catchment (see shapefile).
description: Resource Title: Water supply
 Size: 1113489603 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/3fc83159-6e65-47f9-9fd8-dd60f749fda4/resource/340da6dc-991a-4f2e-9ff1-75b9daea4dcb/download/supply.zip
 Description: Simulated discharge series for a reference period 1981-2010 and till the end of the century. Data are provided for 39 climate model chains and a control run based on the observed meteorology. Data are provided at daily resolution (mm/d).
description: Resource Title: Water demand version 2 (corrected version)
 Size: 1007064 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/3fc83159-6e65-47f9-9fd8-dd60f749fda4/resource/15462633-0157-4027-9f17-1e80ec4c1f92/download/demand.zip
 Description: Water demand estimates for the 307 medium-sized catchments for different categories for current and future conditions. One text file is provided per demand category. One column corresponds to one catchment (IDs compare to shapefile), The data are provided at monthly resolution in mm/d and can be converted to volumes by using the catchment area. E.g. 
Q[mm/d] * catchment area [m<sup>²</sup>] /1000 = Q[m<sup>³</sup>/d] 
or to obtain discharge in m<sup>³</sup>/s 
Q[mm/d] * catchment area [m<sup>²</sup>]/1000/24/3600 = Q [m<sup>³</sup>/s].
Future irrigation and hydropower water demand are provided per climate model chain.
description: Resource Title: Water demand (deprecated)
 Size: 920391 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/3fc83159-6e65-47f9-9fd8-dd60f749fda4/resource/ab06042e-059a-40b0-b9da-101958dab5e7/download/demand.zip
 Description: Warning: please use the corrected version 2, since this file contains errors for certain categories such as Livestock, Industry or Houshold. 

Water demand estimates for the 307 medium-sized catchments for different categories for current and future conditions. One text file is provided per demand category. One column corresponds to one catchment (IDs compare to shapefile), The data are provided at monthly resolution in mm/d and can be converted to volumes by using the catchment area. E.g. 
Q[mm/d] * catchment area [m<sup>²</sup>] /1000 = Q[m<sup>³</sup>/d] 
or to obtain discharge in m<sup>³</sup>/s 
Q[mm/d] * catchment area [m<sup>²</sup>]/1000/24/3600 = Q [m<sup>³</sup>/s].
Future irrigation and hydropower water demand are provided per climate model chain.