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  • Meadow Site
    area 324cm2 automatic Climatic Variables in database 1 Solar radiation NR01 net radiometer Located on the mast In and outgoing long and shortwave radiation automatic 10 min average 2 Windspeed Gill ultrasonic anemometer located on the mast in an elevation of 7m above the meadow measuring interval 0 60 m sec automatic 10 Hz 10 min and 30 min average 3 Wind direction Gill ultrasonic anemometer located on the mast in an elevation of 7m above the meadow measuring interval 0 60 m sec automatic 10 Hz 10 min and 30 min average 4 Air temperature and humidity HMP 45 C located on the mast in an elevation of 5m above the meadow automatic 10 min average 5 Soil temperature Sensors placed in the depths of 5cm 10cm and 20cm ca 50 m from the mast automatic 10 min average 6 Soil heat flux Hukseflux plates at 5 cm depth placed ca 50 m from the mast automatic 10 min average Fluxes not in database 1 Water vapour and CO2 Li Cor LI 7500 open path sensor placed on the mast in an elevation of 7 m automatic 10 Hz 30 min average Li Cor LI 7000 closed path tube inlet placed at 7 m automatic 10 Hz 30 min average 2 CH4 flux Not in database Los Gatos DLT 100 tube inlet placed at 7 m automatic 10 Hz 30 min average Vacuum pump Soil moisture not in database TDR system Probe 1 20 4 horizontal probes in the depths of 20cm 40cm 60cm 80cm and 1m Probe 21 24 75cm probes Probe 25 1m groundwater level probe Probe 26 29 surface probes depth 20cm vertical Probe 30 33 surface probes depth 5cm horizontal probe lengths 20cm 10 Decagon sensors 5TE at 5 cm depth logging every 30 min

    Original URL path: http://www.hobe.dk/index.php/feltstationer/meadow-site (2016-05-02)
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  • Stream Sites
    Bang Poulsen 1 Discharge measurements Acoustic Doppler Current Profiler discharge measurements monthly 2 Water velocity measurements Acoustic Doppler Velocity meter 15 min intervals Download Google Earth Placemark Stream Site 3 Ahlergaarde Jane Bang Poulsen Water measurements not in database 1 Water level measurements Pressure transducer 2 Discharge measurements Acoustic Doppler Current Profiler discharge measurements monthly completed 3 Water velocity measurements Acoustic Doppler Velocity meter 15 min intervals completed Download Google Earth placemark Stream Site 4 Nørbjerg Eva Sebök Temperature not in database 1 Temperature measurements on the streambed Distributed Temperature Sensing DTS system DTS column 2 Multi level temperature measurements in the streambed and water column Temperature probes thermocouples wire depth approx 0 5m below streambed Logger box including multiplexer and thermistor 3 Temperature measurements in the streambed and water column Titbit HOBO Dataloggers Water measurements not in database 1 Water level measurements Pressure transducer 2 Hydraulic head measurements of the aquifer Measuring tape Streambed elevation data not in database Monthly GPS survey Climate Station not in database Air temperature Wind speed wind direction Relative humidity Solar radiation Other installations Solar panels Piezometer transect multilevel DTS logger and batteries Campbell datalogger GSM mobile connection Data gathering method Automatic DTS and Temperatures Manually Hydraulic head and Streambed elevation Previous stream site installations Stream Site 1 Hygild Sachin Karan Precipitation not in database Tipping bucket Temperature not in database 1 Temperature measurements in the top bottom of the water column Titbit HOBO Dataloggers 2 Multi level temperature measurements in the streambed Temperature probes thermocouples wire depth approx 1 6m Logger box including multiplexer and thermistor Water measurements not in database 1 Water level measurements Pressure transducer 2 Hydraulic head measurements of the aquifer Measuring tape Completed 3 Discharge measurements Gauging station daily measurements DMU Vingemåler point measurements 4 Water sampling Point measurements

    Original URL path: http://www.hobe.dk/index.php/feltstationer/steam-site (2016-05-02)
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  • Catchment
    Data Contact Staff HOBE s UAV Test flights at HOBE s agricultural site at Voulund UAV equipped with several cameras UAV weight 4 kg Top speed 100 km h Sensors installed Light weight material soft impact landing You are here Home Field Sites Catchment Courses Surface ground water interaction From watershed processes to hyporheic exchange 27 06 2016 9 00 am Geocenter Undervisningslokale 14 Area 4 5th International COSMOS Workshop

    Original URL path: http://www.hobe.dk/index.php/feltstationer/catchment (2016-05-02)
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  • Workpackages
    site at Voulund UAV equipped with several cameras UAV weight 4 kg Top speed 100 km h Sensors installed Light weight material soft impact landing You are here Home Workpackages Courses Surface ground water interaction From watershed processes to hyporheic exchange 27 06 2016 9 00 am Geocenter Undervisningslokale 14 Area 4 5th International COSMOS Workshop 22 08 2016 8 00 am Forest and Landscape College Airborne Campaigns Weather Radar

    Original URL path: http://www.hobe.dk/index.php/workpackages (2016-05-02)
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  • WP1 - Precipitation
    1 To develop an improved model for correction of precipitation for wind induced errors and to validate it against Danish climate conditions 2 To improve the estimation of regional precipitation by radar data including spatial dependence of the radar rain gauges correction factors 3 To analyze the effect of different precipitation estimation schemes on hydrological model predictions 4 To prepare guidelines for precipitation estimation based on commonly available data in Denmark Work content Task 1 Development of correction factors for point precipitation measurements Test field s has been established for intercomparison of rain gauges against an accurate reference gauge Measurements from the lysimeter Task 3 provides a basis for comparison of integrated precipitation An improved model for correction of liquid and solid precipitation will be developed and validated against local climate conditions A dense network of rain gauges equipped with weather sensors has been established in a sub catchment to study the effects of local shelter and spatial variability of wind speed temperature and precipitation type Task 2 Precipitation estimation using weather radar Sub catchment rain gauges provide support for converting radar data into precipitation estimates Attention is paid to the effects of vertical variations of the reflectivity profile reflectivity enhancement due to melting of hydrometeors clutter and anomalous propagation of the radar beam A survey on radar adjustment methods is being carried out in order to identify the most suitable adjustment technique The adjustment is being optimized by using meteorological parameters such as temperature and weather type to account for spatial and temporal variations of precipitation type Special radar scanning strategies is being adapted to measure the radar radial Doppler winds This is being used to study their effect on the radar rain gauges corrections factors in task 1 Data from radars is used to investigate the spatial dependence

    Original URL path: http://www.hobe.dk/index.php/workpackages/wp1-precipitation (2016-05-02)
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  • WP2 - Evapotranspiration
    the main land use types Measurements have been running since they were established in 2008 thus providing information on both the geographical and interannual variability and will to an increasing extent be used for modeling and scaling of exapotranspiration to the entire catchment Data are processed using the Alteddy software Wageningen University and Research Centre The Netherlands Task 2 Vegetation specific potential evapotranspiration The most appropriate methods to assess crop specific evapotranspiration will be studied and tested at different scales Project data as well as standard meteorological data and data on surface characteristic will be utilized Transfer functions which relate meteorological data to net radiation and reference evapotranspiration to crop specific potential evapotranspiration will be developed Task 3 Remote sensing based estimation of evapotranspiration Sensible and latent heat fluxes evapotranspiration will be estimated by means of different remote sensing dataset The models used are based on the physically based Two Source Energy Balance Model TSEB which partitions the fluxes into soil and canopy soil evaporation and canopy transpiration Data from different satellite sensors with varying viewing and spectral characteristics will be compared and evaluated for the evapotranspiration modeling The different approaches will exploit different remote sensing platforms such as TERRA and AQUA MODIS for the assessment of the morning temperature rise and ENVISAT AATSR to assess directional effects on Land Surface Temperature and the retrieval of canopy and soil temperatures The results will be related to the approaches used for remote sensing of soil moisture described in WP3 and will be essential for the regionalization of evapotranspiration The data and results from the eddy correlation masts and the scintillometer are essential for the validation of the remote sensing algorithms and serve as a basis for improving the remote sensing methods Task 4 Regionalization of evapotranspiration Upscaling of evapotranspiration from plot

    Original URL path: http://www.hobe.dk/index.php/workpackages/wp2-evapotranspiration (2016-05-02)
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  • WP3 - Soil Moisture & Recharge
    sensors have been placed from 0 50 cm and from 1 to 4 m depths to measure profile soil moisture and temperature Suction cups from 1 4 m were installed to sample soil water and infer recharge rates from a field tracer experiment At the forest and wetland HOBE field sites Gludsted and Skjern Enge equivalent TDR and temperature sensors have been installed near the surface Additionally profile soil moisture and soil temperature data is acquired from 30 distributed permanent stations with Decagon 5TE sensors installed at three depths in the top 0 5 m of the soil Task 2 Geophysical arrays Geophysical arrays are installed for cross borehole monitoring of the spatio temporal variations of water content and a saline tracer The setup consists of five ERT and four GPR boreholes drilled to the water table Eight boreholes form a cross consisting of two lines with the last ERT borehole in the centre Along each line the outer two boreholes are equipped with ERT instrumented PVC tubes while the inner two boreholes have access tubes for GPR antennae An array of piezometers will be installed for automatic recordings of water table fluctuations Task 3 Soil physical parameters Soil cores samples were used for laboratory analysis of soil hydraulic characteristics Soil texture water retention and saturated soil hydraulic conductivity were measured The laboratory analysis was further expanded to include near saturated hydraulic conductivity on 20 by 20 cm soil cores Large scale effective hydraulic properties will be estimated using both inverse approaches based on the collected data on water content and tracer concentrations and various upscaling techniques including the stochastic approaches Task 4 Airborne remote sensing of soil moisture During a selected time window airborne brightness temperature measurements of the EMIRAD 2 microwave L band radiometer Technical University of Denmark

    Original URL path: http://www.hobe.dk/index.php/workpackages/wp3-soil-moisture-recharge (2016-05-02)
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  • WP4 - Aquifer Interactions
    Two different wetland stream sites have been monitored site I in the period 2007 2011 and site II from 2009 2012 A new site III is under development 2007 2011 Data has been collected from a wetland stream site I and from 15 stream stations The hydrogeology of the wetland stream site has been mapped with different geophysical techniques MEP georadar and the flow dynamics in the wetland from regular monitoring of water level changes in 23 piezometers Forty temperature probes have recorded seasonal changes in temperature in the stream bed and used to quantify the seepage to the stream Stream discharge CFC apparent ages and water temperature at two levels have been measured at the stream stations 2010 2012 A fiber optic cable DTS has been installed at site II partly shaded for longer periods up to several months to record spatio temporal changes in temperature at the stream bed Two DTS columns have been installed to record the temperature at the atmosphere stream aquifer interfaces Furthermore a climate station was installed The long term placement of the DTS cable allows us to investigate the importance of sedimentation scouring 2012 2013 Site II has now been abandoned and moved to site III with less shading Two different streams within the Skjern catchment have been monitored with pressure transducers and acoustic Doppler instruments during the period 2010 2012 Acoustic Doppler Velocity Meters AVMs have been installed in two three different levels where they record the average flow velocity Monthly discharge measurements using an Acoustic Doppler Current Profiler ADCP have also been performed at the two sites Influences from seasonal and short duration changes in weed distribution and abrupt changes in stage have been recognized in the velocity gradients in the streams It has been shown that the joint use of

    Original URL path: http://www.hobe.dk/index.php/workpackages/wp4-aquifer-interactions (2016-05-02)
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