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Modeling of Irrigation, Water Flow and Nutrient Transport in Soils

November 29-30, 2018

PASCAL │ November 26-30, 2018 │ WASCAL Headquarters, Accra, Ghana

Call for application


Global food security is an ever-increasing, worldwide problem. Over the coming decades, a changing climate, growing global population, rising food prices, and environmental stressors will have significant yet highly uncertain impacts on food security. With almost a billion people around the world who do not have access to a sufficient supply of nutritious and safe food, establishing global food security is important not only to hundreds of millions of hungry people, but also to the sustainable economic growth of these nations. It is essential to increase agricultural productivity through the use of modern irrigation techniques and other agricultural practices and to assess the complex impact of climate change on food security.

Numerical modeling is becoming an increasingly important tool for analyzing complex problems involving water flow, nutrient transport in the unsaturated zone, and irrigation management. This course is designed to familiarize participants with the principles and mathematical analysis of variably-saturated flow and transport processes, and the application of state-of-the-art numerical codes to site-specific subsurface flow and transport problems.

© Jirka ŠimůnekCopyright: Jirka Šimůnek

Keynote Speakers & Hands-on Sessions

  • Prof. Dr. Jirka Šimůnek, main co-developer of the widely popular HYDRUS models and Professor of Hydrology with the Department of Environmental Sciences of the University of California Riverside
  • Dr. Roland Baatz, Scientific Coordinator of International Soil Modelling Consortium, Agrosphere (IBG-3), Forschungszentrum Jülich

Course Description, Software, and Handouts

The course begins with a detailed conceptual and mathematical description of water flow and solute transport processes in the vadose zone. Alternative methods for describing and modeling the hydraulic functions of unsaturated porous media are also described.
"Hands-on" computer sessions provide participants an opportunity to become familiar with the Windows-based HYDRUS computer software packages, including several additional modules, such as ROSETTA. Emphasis is on the preparation of input data for a variety of applications, including flow and transport in a soil profile with a subsurface drip, modified atmospheric forcing and irrigation schemes. Course participants will have an opportunity to use the HYDRUS models for their own data..


The course introduces a new generation of Windows-based numerical models for simulating water, heat and/or solute transport in variably-saturated porous media. These include the HYDRUS-1D and HYDRUS (2D/3D) codes for one- and two-dimensional simulations, respectively, and the Rosetta code for estimating the soil hydraulic properties (and their uncertainty) from soil texture and related data. HYDRUS-1D and HYDRUS (2D/3D) are supported by interactive graphics-based interfaces for data-preprocessing, generation of unstructured as well as structured finite element grid systems, and graphic presentation of the simulation results.


Course material include lecture notes prepared by the instructor. Documentation of HYDRUS-1D and HYDRUS 2D/3D models can be downloaded from the HYDRUS website.

Course outline (preliminary)

Depending on the pre-knowledge and interest of the participants, the program will be adapted.

Lecture 1Vadose zone flow and transport modeling: An overview.
Lecture 2The HYDRUS-1D software for simulating one-dimensional variably-saturated water flow and solute transport.
Computer session 1
HYDRUS-1D: Infiltration of water into a one-dimensional soil profile.
Computer session 2HYDRUS-1D: Water flow and solute transport in a layered soil profile.
Lecture 3HYDRUS (2D/3D) software for simulating two- and three-dimensional variably-saturated water flow and solute transport, Version 2. Domain types.
Computer session 3HYDRUS (2D/3D): Subsurface line source.
Computer session 4 HYDRUS (2D/3D): Furrow infiltration with a solute pulse.
Lecture 4Selected HYDRUS modules and applications.
The use of HYDRUS on participants' data
LecturesPresentations of course participants of their own data and what they would like to accomplish using the HYDRUS software.
Computer sessionIndividual work by participants on their own datasets with an accessional help and under the guidance of the course instructors.
LecturesPresentations of course participants of their HYDRUS simulations using their own data.

Date & Venue

The Hackathon will take place from November 29-30, 2018 at the:

WASCAL Headquarters
CSIR Office Complex
Agostino Neto Road
Airport Residential Area
PMB CT 504 Cantonments-Accra


To apply as a participant (hackathon, HPC training, and/or side programme), please use the online registration form and apply until 30 June 2018 at the latest. Please notice that you will receive a notification after the deadline whether your application was successful and you were granted a place. Participation in PASCAL events is free of charge for applicants who have been granted a place. All participants need to cover their expenses for travel and accommodation by themselves.

Note on image and sound recordings

We would like to point out that during the event image and sound recordings are created, which we also use as part of our public relations work. By participating in the event, you agree to the use of this material.