Poster ORE - INSU

The ORE AGRHYS
an outdoor laboratory to study hydrological and hydrochemical fluxes and processes in agricultural catchments
Molénat J.(1), Ruiz L.(1), Gruau G. (2), Aquilina L.(2), Gascuel C.(1) and Mérot, P .(1),Faucheux M.(1), Fauvel. Y.(1), Gilliet N.(1), Hamon Y. (1), Hénin O. (2), Le Hénaff G. (1), Petitjean P. (2), Davranche M. (2), Dia A.(2), Durand
P.(1), Grimaldi C.(1), Jaffrezic A.(1), Labasque T. (2), Lecorre P.(3), Lecoz-Boutnik M.(2), Le Gall A.H.(2),Le Roy Maryvonne(1), Pierson-Wickmann A.-C.(2),Tarits C. (3)
(1) UMR 1069 INRA-Agrocampus Rennes, FR CAREN, France, (2) UMR 6118 Geosciences Rennes CNRS-Univ. of Rennes1, FR CAREN, France, (3)UMR 6538 Dynamique océanique, CNRS-UBO, IFR IUEM, France
OBJECTIVE AND PRESENTATION
In 2001, the French Ministry for Scientific Research created the
Research Observatories in Environment (Observatoires de
Recherche en Environnement –ORE). AgrHys is one of these 29
OREs. The main objective of AgrHys ORE is to observe and to
understand the response times of hydrological and
hydrochemical fluxes to the evolution of agro-hydro system. An
agro-hydro system is a catchment where the dynamics of
chemical elements and water are modified by agricultural
activities. The Observatory AgrHys is an original and outstanding
tool with an average 10 year long and high frequency records of
chemical and hydrological internal and global variables
CURRENT ISSUES ADDRESSED IN AGHRYS
OBSERVED DATA AND DATA MANAGEMENT
Catchment intrinsic properties
• Response time of hydrosystems to the evolution of agricultural activities
• Stream flow generation (Figure 5)
• Solute transfer in the vadose zone-groundwater continuum,
• Bedrock weathering processes
• Hydrologic controls on nitrate export (Figure 6)
• Nitrogen dynamics in soils and wetlands,
• Sediment dynamics in stream,
• Tracing the origin and fate of organic matter in watershed,
• Role of hydroclimatic variability on the cycling and transport of DOC and trace metals across
the wetland-stream transition (Figure 4)
•topography
•soil and geologic structures
Continuous hydrological recording:
•stream water level (/1-6 min)
•water table level (/15-60 min)
•meteorological variables –rainfall, wind, air and soil temperature, global radiation - (/1hr-1day)
Chemical analysis and measurements:
•major anions and trace elements in stream water, rain water and groundwater
•pH, redox potential, temperature, electric conductivity measured in situ
Water sampling frequency
•stream water: 1/day to 1/week
•groundwater: 1/week to 1/3months
•rainfall: 1/month
Agricultural surveys
2 SITES
Western France (Amorican Massif)
Humid and temperate climate
Shallow groundwater controlled hydrology
Figure 4: Dissolved organic carbon
concentration and stream discharge in the KervidyNaizin catchment over 4 years
•land use, crop yield, cattle grazing management
•type and rate of fertilisation applied on fields
The Kervidy-Naizin catchment and the Kerbernez catchments
DATABASE SYSTEM AND INFORMATION TRACING
a database system with a web interface: a tool to store data as well as a tool to provide fast,
effective and open access to ORE AgrHys data per se. Metadata (data relative to datalogger, sensors,
equipment calibration and management) are also inserted in the database and provided to users.
Kervidy-Naizin
Kerbernez
Kervidy-Naizin
Kerbernez
Le Puits
Kerbernez
N
1 3 0
1
Pressure sensor with
datalogger for water
table monitoring
Float-operated encoder with
datalogger for stream water
level monitoring
FROM THE FIELD TO AGHRYS DATABASE
Automatic weather
station
STEP 1: Transfer of records in situ
into a laptop computer or from the lab by GSM
STEP 2: Data are checked, can be corrected and are affected
with a level of correction (0 or 1) and of reliability
2 0
Kerrien
Gueriniec
hillslope
Kerolland
hillslope
Water
table
Guerveur
STEP 3: Data are inserted in the AgrHys database
stream
1 0 0
Deep wells (-40m)
C
o ‘t
D
Mercy
wetland
STEP 4: Data extraction can be done. Extracted data are stored
in a text file that is downloaded by users
Piezometers (3-15m)
Cased piezometers
1 km
a n
Stream
gauge station
bedrock
<br> filename :sastransfert/jerome_extraction18-01-2007-17-31
Figure 1: map and location of the Kervidy-Naizin and Kerbernez catchments
EQUIPMENT
stream gauge stations with sensor and datalogger
piezometers
•20 in Kervidy-Naizin (12 with sensor and datalogger)
•68 in Kerbernez (15 with sensor and datalogger)
Weather stations
Lysimeter
•8 in Kerbernez
Extraction de données
Fichier : sastransfert/jerome_extraction18-01-2007-17-31
le 18/01/2007
BV : Kerrien
Catchment name
Site : Transect_F
Site name
Point de mesure : F4
Location name
Données de niveau d eau du : 01-01-2005 00:00:00 au :07-11-2006 12:00:00
File heading
;Instrument;date;valeur;correction;fiabilite;
;de mesure;; en m;(0:ext 1:non;(0:ext 1:fort;
;;;; 2:oui); 2:moyen 3:faible);
;CAN-BUL-04;01/01/2005 00:00:00;-9.18;1;1;
;CAN-BUL-04;01/01/2005 12:00:00;-9.16;1;1;
;CAN-BUL-04;02/01/2005 00:00:00;-9.14;1;1;
;CAN-BUL-04;02/01/2005 12:00:00;-9.13;1;1;
;CAN-BUL-04;03/01/2005 00:00:00;-9.12;1;1;
;CAN-BUL-04;03/01/2005 12:00:00;-9.11;1;1;
;CAN-BUL-04;04/01/2005 00:00:00;-9.09;1;1;
;CAN-BUL-04;04/01/2005 12:00:00;-9.07;1;1;
Reliability level
Correction level
Measured value
Time
Name of the sensor
Figure 2: A file of data extracted from AgrHys data base.
Data are water table depths recorded in the F4
piezometer of the transect F in Kerrrien catchment from
01-0162005 to 07-11-2006
Poster presented at the EGU General Assembly 2007, Vienna (Austria), 15-20 April 2007
Figure 5: Specific stream discharge and water table depth along
hillslopes in Kervidy-Naizin (blue line), Kerbernez (green line) and
Kerrien (red line) catchment over 5 water years.
Figure 3: A window of AgrHys data base interface
Figure 6: stream nitrate
concentration .vs. stream
discharge in Kerrien, Kerbernez
and Kervidy-Naizin catchments
For more information and data, the web sites
the ORE AgHYs web site: http://www.caren.univ-rennes1.fr/ORE-AgrHyS/
The database web site: http://www.rennes.inra.fr/hysae