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Table 1

List and definition of criteria selected

Criterion no.Criterion nameDefinition
C1 Access duration Time necessary to access the station 
C2 Access quality (easyness) Asphalted roads provide easy and quick access to the locations. Most paths are unpaved tracks but accessible with 4 × 4 vehicles. Worse cases include unpaved track in bad state and access by foot 
C3 Land use/land cover Station's close environment: open space area or presence of obstacles like trees, building, walls, cables, etc. (for rain gauges) 
C4 Drainage area at the station Stream catchment, after an important stream's confluence or at the outlet of the catchment, based on Strahler's number (for streamflow stations) 
C5 Catchment representativeness Site physiography, i.e. high (over 3,000 m a.s.l.) open areas (for rain gauges). Type of stream at the site, i.e. major/permanent stream or small/temporary stream (for stream gauges) 
C6 Level of correlation between stations A low correlation (<0.5) means that the data recorded may not be representative of the area or that the distance between adjacent stations is too large for data prediction at ungauged locations. A high correlation between a station and the next closest station means data redundancy (r > 0.99) 
C7 Running and maintenance cost Additional cost of operating the station (depending on equipment, visit frequency, field mission organization, etc.) and maintenance (cleaning, spare parts, etc.) 
C8 Security Risk of vandalism and equipment theft 
C9 Time in operation Data record length 
C10 Data quality Data records continuity, quantity of data gaps (which hinder strongly its further use) 
C11 Usefulness of the station Value of data generated by the station for the users, on the basis of user surveys 
Criterion no.Criterion nameDefinition
C1 Access duration Time necessary to access the station 
C2 Access quality (easyness) Asphalted roads provide easy and quick access to the locations. Most paths are unpaved tracks but accessible with 4 × 4 vehicles. Worse cases include unpaved track in bad state and access by foot 
C3 Land use/land cover Station's close environment: open space area or presence of obstacles like trees, building, walls, cables, etc. (for rain gauges) 
C4 Drainage area at the station Stream catchment, after an important stream's confluence or at the outlet of the catchment, based on Strahler's number (for streamflow stations) 
C5 Catchment representativeness Site physiography, i.e. high (over 3,000 m a.s.l.) open areas (for rain gauges). Type of stream at the site, i.e. major/permanent stream or small/temporary stream (for stream gauges) 
C6 Level of correlation between stations A low correlation (<0.5) means that the data recorded may not be representative of the area or that the distance between adjacent stations is too large for data prediction at ungauged locations. A high correlation between a station and the next closest station means data redundancy (r > 0.99) 
C7 Running and maintenance cost Additional cost of operating the station (depending on equipment, visit frequency, field mission organization, etc.) and maintenance (cleaning, spare parts, etc.) 
C8 Security Risk of vandalism and equipment theft 
C9 Time in operation Data record length 
C10 Data quality Data records continuity, quantity of data gaps (which hinder strongly its further use) 
C11 Usefulness of the station Value of data generated by the station for the users, on the basis of user surveys 
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