Data for Pegase

Input Data

The amount of data necessary to gather in order to perform Pegase simulations can look huge. It is necessary to consider though:

• in a general way, this data is normally collected by the administrations in charge of the management of surface water (it is therefore not needed to perform specific measurement campaigns)
• the absence of some data, although useful, does not prevent from doing some simulations with hard coded default values
• if some processes ar of a minor importance in some watershed, it is not necessary to spend a lot of time and effort to collect the related data (e.g. semi-hourly sunlight energy data is not useful if there is no or few phytoplankton)

The main input data to collect are:

• Map backgrounds
  • Digital Terrain Model (DTM) or Digital Elevation Model (DEM)
  • land use (Corine Land Cover…)
  • Digitisation of hydrographic zones outline
  • Digitisation of municipality outlines
• Watershed Data
  • River Digitisation
  • River Network Topology
  • Network Singularities (canals, dams…)
• Releases and Loads
  • Urban releases (location + inhabitant-equivalent + link with WWTP)
  • Industrial Releases (location + load + link with WWTP)
  • Waste Water Treatment Plants (WWTP) (Location, capacity, abatement)
  • Livestock (bovines, pigs…)
• Hydro-meteorology
  • Daily average flow measured at a few gauging stations where the flows are representative of the watershed behaviour
  • Natural Temperatures of water at a few measuring stations
  • Insolation
• Misc.
  • Quality measurements (not used for calculations, but required for validation)

The following table shows a summary of data required:

Pegase: Inventory of required data

Data	Format	Description / comment
1. Geographical Data
1.1 Hydrographic Network	shapefile	full hydrographic network, digitised layer of the watercourses to model
1.2 Digital Terrain Model	ASCII GRID, altitudes of points (x,y,z)	resolution 25 to 100 m
1.3 Subbasins	shapefile	Delimitation of "hydrographic zones" or subbasins. Unique identifier (hydrographic codes) required (4 characters)
1.4 Land use	shapefile, ASCII GRID, georeferenced images	Land usage: eg Corine LandCover
1.5 Administrative Borders	shapefile	Outline of Municipalities (required if data provided per municipality eg livestock)
1.6 Singularities of hydrographic network
1.6.1 Canals	Var.	Position, management characteristics
1.6.2 Dams	Var.	Position & stage management
1.6.3 Water takes	Var.	Position, value and evolution with time
1.7 Hydrographic Network Characteristics	Var.	width, slopes, water bodies…
2. Meteo Data
Prerequisite: A Reference Year shall be chosen
2.1 Insolations	.txt, .xls, .csv, .dbf…	semi-hourly values (eventually hourly or daily) of the net solar irradiation at ground level (J/cm2, W/m2…)
2.2 River Flows	.txt, .xls, .csv, .dbf…	Daily Average Flow per day (non-stationnary) or characteristic flow (steady-state) at gauging stations
2.3 Water Temperatures	.txt, .xls, .csv, .dbf…	Daily average Water temperature at measurement stations
2.4 Rainfall	.txt, .xls, .csv, .dbf…	Daily average of rainfall (mm/day) at meteo station, optional, needed for Rain weather urban runoff
2.5, 2.6, 2.7, 2.8 : Stations location	.txt, .xls, .csv, .dbf, shapefile	Identifier, location (x,y), identifier of river (hydrographic code) of stations for the 4 former measurements
3. Releases
3.1 Urban	.txt, .xls, .csv, .dbf…	identifier, location (x,y), WWTP connexion, equivalent-inhabitants
3.2 Industrial	.txt, .xls, .csv, .dbf…	identifier, location (x,y), WWTP connexion, loads (kg/day), discharge (l/day), type of industry
3.3 Waste Water Treatment Plants	.txt, .xls, .csv, .dbf…	identifier, location (x,y), capacity, type, starting date
3.4 Abatement of WWTP	.txt, .xls, .csv, .dbf…	identifier, input/output fluxes (or efficiency)
3.5 Livestock	.txt, .xls, .csv, .dbf…	Cheptel (bovins, porcins…) per administrative unit (municipality, county, bourough…)
4. Quality Measurements
4.1 Measurement stations	.txt, .xls, .csv, .dbf, shapefile	identifier, location (x,y), river identifier (hydrographic code)
4.2 Mesures de qualité	.txt, .xls, .csv, .dbf, …	identifier, date, measurements (DCO, NH4, Ptot…) as often as possible

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Aquapole
Quartier Polytech 1
Allée de la découverte, 11
4000 Liège
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