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Overview

EFAS SOS is a web API for retrieving EFAS forecasts as data. The API returns an xml file. Example api requests can be found on the SOS services's web page. Note that in order to download recent forecasts, EFAS SOS credentials are required. These can be requested from the EFAS project.

Within EFAS, four streamflow forecast products are produced. These are listed in below table which includes various characteristics that are relevant for the configuration of the present Delft-FEWS import.

ForcingTypeEnsemble rangeprocedure
DWD ICONdeterministic
eud_lisflood
COSMO-LEPSensemble1 - 20cos_lisflood
ECMWF-HRESdeterministic
eud_lisflood
ECMWF-ENSensemble1 - 50eue_lisflood


The European Flood Awareness System(EFAS) Sensor Observation Service(SOS) import function (<importType>EfasSosServer</importType>) imports XML files from the EFAS SOS API. 

The EfasSosServer import supports observations as defined in http://schemas.opengis.net/sos/2.0/sosGetObservation.xsd.

Example import module xml file

Below is an example of an xml config for the EFAS SOS Import Module Instance. Some highlights include:

  • import type is <importTypeStandard>EfasSosServer</importTypeStandard>
  • credentials are required to download recent EFAS forecasts, i.e. forecasts that were produced in the last 30 days.
  • The procedure property specifies which product is requested. See above table for possible options.
  • For ensemble products:
      • the following property should be included: <bool key="ensemble" value="true"/>
      • the timeSeriesSet element should include both an <ensembleId> and an <ensembleMemberIndexRange> element. The latter should specify which ensemble members should be requested. Example: <ensembleMemberIndexRange start="1" end="20"/>
<?xml version="1.0" encoding="UTF-8"?>
<timeSeriesImportRun xmlns="http://www.wldelft.nl/fews" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.wldelft.nl/fews http://fews.wldelft.nl/schemas/version1.0/timeSeriesImportRun.xsd">
	<import>
		<general>
			<importTypeStandard>EfasSosServer</importTypeStandard>
			<serverUrl>https://efas-sos.efas.eu/sos/?service=SOS&version=2.0.0</serverUrl>
			<user>xxxx</user>
			<password>xxxxxxxxxx</password>
			<idMapId>id_import_efas_sos</idMapId>
		</general>
		<properties>
			<string key="procedure" value="dwd_lisflood"/>
		</properties>
		<timeSeriesSet>
			<moduleInstanceId>import_efas_sos</moduleInstanceId>
			<valueType>scalar</valueType>
			<parameterId>Q</parameterId>
			<locationId>X007318</locationId>
			<timeSeriesType>external forecasting</timeSeriesType>
			<timeStep unit="hour" multiplier="6"/>
			<readWriteMode>add originals</readWriteMode>
			<ensembleId>dwd_lisflood</ensembleId>
		</timeSeriesSet>
	</import>
	<import>
		<general>
			<importTypeStandard>EfasSosServer</importTypeStandard>
			<serverUrl>https://efas-sos.efas.eu/sos/?service=SOS&version=2.0.0</serverUrl>
			<user>xxxx</user>
			<password>xxxx</password>
			<idMapId>id_import_efas_sos</idMapId>
		</general>
		<properties>
			<string key="procedure" value="cos_lisflood"/>
			<bool key="ensemble" value="true"/>
		</properties>
		<timeSeriesSet>
			<moduleInstanceId>import_efas_sos</moduleInstanceId>
			<valueType>scalar</valueType>
			<parameterId>Q</parameterId>
			<locationId>X007318</locationId>
			<timeSeriesType>external forecasting</timeSeriesType>
			<timeStep unit="hour" multiplier="6"/>
			<readWriteMode>add originals</readWriteMode>
			<ensembleId>cos_lisflood</ensembleId>
			<ensembleMemberIndexRange start="1" end="20"/>
		</timeSeriesSet>
	</import>
	<import>
		<general>
			<importTypeStandard>EfasSosServer</importTypeStandard>
			<serverUrl>https://efas-sos.efas.eu/sos/?service=SOS&version=2.0.0</serverUrl>
			<user>xxxx</user>
			<password>xxxx</password> 
		    <idMapId>id_import_efas_sos</idMapId>
		</general>
		<properties>
			<string key="procedure" value="eud_lisflood"/>
		</properties>
		<timeSeriesSet>
			<moduleInstanceId>import_efas_sos</moduleInstanceId>
			<valueType>scalar</valueType>
			<parameterId>Q</parameterId>
			<locationId>X007318</locationId>
			<timeSeriesType>external forecasting</timeSeriesType>
			<timeStep unit="hour" multiplier="6"/>
			<readWriteMode>add originals</readWriteMode>
			<ensembleId>eud_lisflood</ensembleId>
		</timeSeriesSet>
	</import>
	<import>
		<general>
			<importTypeStandard>EfasSosServer</importTypeStandard>
			<serverUrl>https://efas-sos.efas.eu/sos/?service=SOS&version=2.0.0</serverUrl>
  			<user>xxxx</user>
			<password>xxxx</password>
      <idMapId>id_import_efas_sos</idMapId>
		</general>
		<properties>
			<string key="procedure" value="eue_lisflood"/>
			<bool key="ensemble" value="true"/>
		</properties>
		<timeSeriesSet>
			<moduleInstanceId>import_efas_sos</moduleInstanceId>
			<valueType>scalar</valueType>
			<parameterId>Q</parameterId>
			<locationId>X007318</locationId>
			<timeSeriesType>external forecasting</timeSeriesType>
			<timeStep unit="hour" multiplier="6"/>
			<readWriteMode>add originals</readWriteMode>
			<ensembleId>eue_lisflood</ensembleId>
			<ensembleMemberIndexRange start="1" end="50"/>
		</timeSeriesSet>
	</import>
</timeSeriesImportRun>




Example url for retrieval of ensemble of 50 from api.
https://efas-sos.efas.eu/sos/?service=SOS&version=2.0.0&request=GetObservation&featureOfInterest=ID_1&procedure=eue_lisflood_50&temporalFilter=om:resultTime,2020-08-10T00:00:00Z

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