1 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 1 st, Task Team on WIGOS MetaData (TT-WMD) WMO Headquarters.

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1 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March st, Task Team on WIGOS MetaData (TT-WMD) WMO Headquarters in Geneva, Switzerland from 11 to 15 March 2012 REQUIREMENTS FOR OBSERVATIONAL METADATA from the perspective of the Commission for Hydrology – CHy submitted by the Global Runoff Data Centre (Irina Dornblut, Ulrich Looser)

2 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Information about the dataset: –identificationInfo: citation, abstract, language, topicCategory –extent: bounding box/polygon, vertical extent, temporal extent –resourceConstraints: useLimitations, access-/useConstraints –descriptiveKeywords: keyword, type, thesaurusName as defined within the WMO Core Metadata 1.3 (July 2012) Additional information is required with respect to time series –identify time series (representation information) –describe time series as temporal coverages (WML2) –identify time series as result of observation (content information) –describe hydrologic variable, monitoring point, observation process (observation details) WIS Discovery Metadata provide

3 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 WIGOS Discovery Metadata provide Details about the observation whose result is the dataset: -hydrologic object under observation -hydrologic variable observed -monitoring station / platform used -instrument / sensor or algorithm applied Assure thematic accuracy of data compiled in the dataset Should use common concepts as far as suitable -sampling-/sampledFeature, observedProperty and procedure (ISO19156) as implemented within WML2.0 Part 1: Time series (OGC10-126r3) -HY_Features concepts (documented in OGC r2, under review)

4 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Compilations / collections of hydrologic data each value at a position in time different from that of the others  time series of ordered time-value pairs (provided in WaterML2.0 Part1: Time Series) each value at a position in space different from that of the others  coverages of points, lines or polygons (vector data)  regular-grid files (raster data), e.g. square-grids (concepts provided within ISO 19123:Coverage geometry …) Hydrologic Datasets

5 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 describe real-world properties of a hydrologic object water: physical, chemical, biological properties, … water body: water level, discharge, volume of recharge, … containing unit: conveyance, conductivity, porosity, … result from observation, or its simulation using a sampling feature as proxy: observing station, gauging site, observation well, water sample, etc applying a suitable procedure: sensor, calculation process, rating, model, etc Hydrologic Datasets

6 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 refer to objects which represent units of shared interest wherein the hydrologic processes take place, … Unit of study across scientific disciplines and sub-disciplines, addressed in inter-disciplinary programs, inter-program collaboration and cross-domain research projects Unit of management across administrative jurisdictions, addressed by Integrated Water Ressources Management Unit of monitoring and reporting crossing political boundaries, addressed in reporting systems, information and data portals Hydrologic Datasets

7 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Datasets –Time-Series Example ContentInformation::Coverage Description::RangeDimension (WML2)TimeseriesMetadata ContentInformation::Coverage Description::RangeDimension (WML2)TimeseriesMetadata (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property Series of time-value pairs using a monitoring point on a river and applying a process (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Result from measurement Measurement Monitoring Point Observation Process Hydrologic Variable: Q Streamflow River Basin representing the basin where the flow process takes place describe a hydrologic variable of the river WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss ContentInformation::Coverage Description. type: PhysicalMeasurement (Observation result) ModelResult (Simulation)...Attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement (Observation result) ModelResult (Simulation)...Attribute. name: observableProperty: e.g. Discharge description:TimeValuePair observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries Q

8 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Hydrological study in the Niger River Basin: For a streamflow study in the Niger river basin, time series of daily discharge data, between 1981 and 2010, longer then 15 years, at stations on the rivers in the Niger river basin are requested. As far as available information should be provided about missing values. find extent and temporal resolution of time series, e.g , 15, daily, … f... missing value information of the time series, e.g. percentage of missing values. f... the hydrologic variable of which time series are avaiable, e.g. discharge. f... the hydrologic process characterised by the variable, e.g. streamflow. f... the river characterised by the variable, e.g. Benue river. f... the basin represented by the Benue river, e.g. Niger basin. A list, and a map, of all stations in the Niger river basin should be provided comprising the available time series of daily data between 1981 and 2010 with a minimum length of 15 years which enables the user to identify a station of interest and select the time series by percentage of missing values. Discovery of hydrologic datasets, useCase 1

9 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 1 ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries … of measured DISCHARGE, Q, characterising the RIVER, or the STREAMFLOW, representing the BASIN ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper find time-value pairs … Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin

10 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Time series collected by a data centre: A regional data center collect time series of daily data from decentralised stations whose data are provided in automated way. As far as available information should be provided how the data values are aggregated and about the instrument or method used for the value determination. find extent and temporal resolution of time series, e.g. daily f... options to transfer time series, e.g. semi-automated transfer, protocols, … f... aggregated data value compiled in the time series, e.g. aggregation interval. f... the hydrologic variable of which time series are available, e.g. discharge. f... determination of discharge values, e.g. ADCP, float gauge, rating. f... the station for which discharge data are available, e.g (Cochem). f... the river on which is located, e.g. Moselle. f... the basin represented by the Moselle river, e.g. Rhine basin. A list, and a map, of all stations in the Rhine basin should be provided comprising the available time series of daily data which enables the collecting data center to identify a station of interest by data transfer mode, and select the time series by data aggregation and the value determination. Discovery of hydrologic datasets, useCase 2

11 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 2a (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty ::Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty ::Any_Property (WML2)ObservationProcess Instrument,Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument,Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper … of Q, measured using a specific PROCESS at MONITORING POINT on the RIVER, representing the BASIN find time-value pairs … Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries

12 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 2b (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty ::Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty ::Any_Property (WML2)ObservationProcess Instrument, Sensor/ Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument, Sensor/ Calculation platform:: MonitoringPoint constrainedProperty::anyVariable Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper … of Q, measured using the MONITORING POINT, sampling the RIVER, representing the BASIN find time-value pairs … Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries

13 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 3 (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)ObservationProcess Instrument, Sensor/ Calculation platform:: MonitoringPoint constrainedProperty::anyVrble (WML2)ObservationProcess Instrument, Sensor/ Calculation platform:: MonitoringPoint constrainedProperty::anyVrble Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper … at a MONITORING POINT, using a specific PROCESS, observing Q of the RIVER, representing the BASIN find time-value pairs … Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries

14 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 4 (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)ObservationProcess Instrument, Sensor/ Calculation platform:: MonitoringPoint constrainedProperty::anyVrble (WML2)ObservationProcess Instrument, Sensor/ Calculation platform:: MonitoringPoint constrainedProperty::anyVrble Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy ISO/WMO ISO19156 / OGC10-126r3 (WML2) OGC11-039r2 (HY_Features) discussion paper GRDC Metadata (Draft) … using a specific PROCESS, observing Q, characterising the RIVER / STREAMFLOW, representing the BASIN find time-value pairs … Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries

15 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 5 ContentInformation::Coverage Description::RangeDimension (WML2)TimeseriesMetadata ContentInformation::Coverage Description::RangeDimension (WML2)TimeseriesMetadata (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper … of measured Q, characterising the RIVER, representing the STREAMFLOW in the BASIN find time-value pairs … Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin ContentInformation::Coverage Description. type: PhysicalMeasurement (Observation result) ModelResult (Simulation)...Attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement (Observation result) ModelResult (Simulation)...Attribute. name: observableProperty: e.g. Discharge description:TimeValuePair observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss

16 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 6 (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper find time-value pairs … … at a MONITORING POINT, sampling the RIVER, representing the BASIN Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance Q WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries

17 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Discovery of hydrologic datasets, useCase 7 (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty:: Any_Property Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper find time-value pairs … … resulting from a specific PROCESS at a MONITORING POINT on the RIVER, representing the BASIN observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance observableProperty::hydrol…Variable carrierOfCharacteristics:: River / HydrologicProcess constrainedBy::[anyConstraint] Algorithm / Configuration / Location Material / Organism / Substance WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description::… (WML2)TimeseriesMetadata ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair ContentInformation::Coverage Description. type: PhysicalMeasurement ModelResult... attribute. name: observableProperty: e.g. Discharge description:TimeValuePair SpatialRepresentationInfo:: (applied to Time domain) TimeSeries SpatialRepresentationInfo:: (applied to Time domain) TimeSeries

18 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Access to hydrologic data, e.g. via SOS (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Monitoring Point sampledFeature::HydroFeature hostedProcedure: …Process (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty ::Any_Property (WML2)Timeseries Observation featureOfInterest:: MonitoringPoint procedure::Observ ationProcess observedProperty ::Any_Property (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable (WML2)ObservationProcess Instrument, Sensor / Calculation platform:: MonitoringPoint constrainedProperty::anyVariable AnyProperty::(hydrologic)Variable characterisedFeature:: HydroFeature characterisedProcess::Hydrolo..Prcss constrainedBy:: anyConstraint Algorithm / Configuration / Location Material / Organism / Substance AnyProperty::(hydrologic)Variable characterisedFeature:: HydroFeature characterisedProcess::Hydrolo..Prcss constrainedBy:: anyConstraint Algorithm / Configuration / Location Material / Organism / Substance Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy Catchment / Basin: (reporting region) containingBasin:: Basin containingSystem:: BasinHierarchy TimeSeries (WML2) of TimeValuePairs where observedProperty:Variable (at the) FoI:MonitoringPoint (on the) sampledFeature:River (using) procedure:Instrument TimeSeries (WML2) of TimeValuePairs where observedProperty:Variable (at the) FoI:MonitoringPoint (on the) sampledFeature:River (using) procedure:Instrument sos:getObservation… om:result ISO/WMO ISO19156 / OGC10-126r3 (WML2) GRDC Metadata (Draft) OGC11-039r2 (HY_Features) discussion paper … time-value pairs of Q, observed using a SENSOR / CALCULATION at STATION on the RIVER Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin Hydrologic Process Streamflow Groundwater flow Water use hostingUnit::Basin WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss WaterBody, spec. River representedCatchment::Basin representedProcess::hy..Procss

19 Global Runoff Data Centre (GRDC) at the German Federal Institute of Hydrology (BfG), March 2013 Requirements for WIGOS metadata from the perspective of the Commission for Hydrology, CHy References: GRDC (2012): Hydrologic Information – Metadata: a semantic structure for the description of hydrologic data (GRDC Hydrologic Metadata). Summary prepared for the 14th session of WMO CHy. Koblenz, GRDC (2013): Hydrologic Information – Metadata: a semantic structure for the description of hydrologic data (GRDC Hydrologic Metadata). – in preparation (June 2013). ISO (2012): Geographic information -- Metadata -- Part 1: Fundamentals (ISO/DIS ). Draft ISO (2011): Geographic information -- Observation and Measurements (ISO 19156). International Standards Organisation, Geneva. OGC (2012): OGC Implementation Standard -- OGC® WaterML 2.0: Part 1- Timeseries (OGC r3 ). Open Geospatial Consortium OGC (2012): OGC Discussion Paper -- HY_Features: a Common Hydrologic Feature Model Discussion Paper (OGC r2 ). Open Geospatial Consortium WMO (2012): WMO Core Metadata Profile version Specification. Draft. Geneva, 2012