MOPEX PARIS Workshop July 1-3, 2004 ENGREF, Paris, France

CEMAGREF Website and Data Links for Paris Workshop

AGU Eos Article - June 1, 2004

1. General Scientific Objectives

MOPEX (Model Parameter Estimation Experiment) was established to aid in the development of techniques for the a priori estimation of parameters used in land surface parameterization schemes of atmospheric and hydrological models. Workshops have been held each of the past three years to investigate various issues related to parameter estimation and regional applications. The 4^th International MOPEX workshop will be held this summer in Paris, focusing on the estimation of parameters for ungaged watersheds in humid regions. To allow for maximum participation, the workshop is designed so that modelers can chose varying levels of involvement (based on resources and the number of basins they wish to study). A well defined set of science objectives are also planned to allow for a coordinated and meaningful analysis of workshop results. A last objective for the workshop is the development of an international database with basins from various countries. Please visit the MOPEX website for more information (http://www.nws.noaa.gov/oh/mopex).

2. Workshop Structure
Participation Level Choices:

Level 1 - using 3 basins (3 French)
Level 2 - using 12 basins (12 French, including those from Level 1)

Level 3 - using 40 basins (including those from Level 2)

Optional Basins for Study include 12 U.S. Basins (Humid Climatology).
These basins may be found at the NOAA/NWS ftp site: ftp.nws.noaa.gov/oh/gcip/mopex2004.

3. Presentations during workshop - Pre-defined elements that are required to be addressed by each participants
a. Present the details of the model structure you applied.
b. What approach did you use to estimate the a priori value of your parameters?
c. What approach did you use to calibrate your parameters?
d. Present the results of your sensitivity analysis, and of the streamflow predictions for the a priori and the calibrated case.

Simulations and files to be submitted for each basin:

Link to Simulation and Analysis Requirements (Cemagref website)

Possible complementary research paths for the MOPEX Paris workshop

Provide an estimate of the soil moisture state (time-series) of the watershed.

        Develop new a priori estimates for model parameters based on the characteristics of the whole watershed sample.
Compare and discuss criteria used for the assessment of model results.

        Assess how results depend on the time step used by the model (compare for example the results obtained at the daily time step, depending on the time step that has been used for the precipitation input: hourly vs. daily).

        Multi-model Analysis

        Calibrate the hydrologic model using only ten days chosen in the first half of the time period and predict the daily streamflow for the second half. (Participants may use a combination of an a priori parameter estimates and a calibration on these ten days).

4. Instructions for interested participants
The MOPEX group welcomes all new participants who would like to contribute to the Paris workshop with their own model, using the common data sets. Data and instructions for the naming of file may be found on the Cemagref ’s ftp file. To access the data participants should first download sign and return the data exchange agreement. Once the document is received, instructions to access the site, logins and passwords will be emailed. Please fax the form to CEMAGREF at 33-1-40-96-61-99. Result files should be submitted before the 22^nd of June.

DATA AGREEMENT FORM

5. Organization

The Paris workshop is organized by the CEMAGREF in collaboration with the ENGREF, Météo France, the National Weather Service and the SAHRA –University of Arizona.

Members of the local committee are : France : Vazken Andréassian and Nanée Chahinian (CEMAGREF), Florence Habets (Météo France), Eric Parent (ENGREF).

USA: Qingyun Duan (Lawrence Livermore National Laboratory), Hoshin Gupta (SAHRA/University of Arizona), Terri Hogue (UCLA), George Leavesley (USGS) John Schaake (National Weather Service), Thorsten Wagener (SAHRA/University of Arizona).

6. Registration

All participants are requested to fill in the registration form and return it by June 15^th 2004. The registration form can be downloaded using the following link.

Registration Form

Invitation Letter for Visa

7. Travel Information (maps)
The workshop will be held at the ENGREF, 19 avenue du Maine 75015 Paris.

Nearest metro station is Montparnasse-Bienvenuë.

Air France buses can transfer you directly from CDG and Orly airports to the gare de Montparnasse train station located 500 m from the workshop venue » 10 minutes walk away.

From “Place Raoul Dautry” head to “Boulevard Vaugirard”, walk on straight for 81 m, turn left on “Place the Bienvenuë” and head towards the Avenue du Maine.

8. Hotel Booking
Each participant should take care of his/her own hotel booking. A list of hotels located within close distance of the venue has been supplied by the ENGREF. Participants can also search for accommodation through

ELYSEES WEST RESERVATION

Tél : 01 47 75 92 90

Fax : 01 47 75 92 99

The Paris tourist board:  http://www.paris-touristoffice.com/index_va_v2.html

We advise you to book your accommodation well in advance.

Hotels selected by the ENGREF
Name	Address	Rate (*)
HOTEL DE LA TOUR	19 boulevard Edgar Quinet 75014 PARIS Tel : 01 43 20 67 09 Fax : 01 40 47 04 31	35 (5)
ETAP HOTEL PARIS PORTE D'ORLEANS	15-21 boulevard Romain Rolland 75014 PARIS Tel : 01 46 56 26 27 Fax : 01 46 56 57 40	42,5 (3,80)
PETIT PALACE HOTEL	131 avenue du Maine 75 014 PARIS Tel : 01 43 22 19 75 Fax : 01 43 21 79 01	54 (5)
HOTEL MISTRAL	24 rue de Cels 75014 PARIS Tel : 01 43 20 25 43 Fax : 01 43 21 32 59	56 (6)
CAMPANIL MONTPARNASSE	146 avenue du Maine 75 014 PARIS Tel : 01 53 74 60 00 Fax : 01 40 47 01 49	67 (6,42)
TRIANON/ IBIS	22 avenue du Maine 75 015 PARIS Tel : 01 45 48 95 52 Fax : 01 45 48 82 44	79 (6)

Rates are for a single room with shower and WC. Breakfast is not included but can be purchased for the sum given in parenthesis.

The Rates are in Euros as stated on April 24 2003.