The Stormwater Experts

Morocco water management for two big catchments

PPP Morocco

Public–private partnership (PPP) is a government service or private business venture which is
funded and operated through a partnership of government and one or more private sector companies.
PPP involves a contract between a public sector authority and a private party, in which
the private party provides a public service or project and assumes substantial financial, technical
and operational risk in the project.
Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) and the privately held company
Ingenieurgesellschaft Prof. Dr. Sieker mbH (IPS) has been commissioned to develop an optimized
model based water management for two pilot areas in Morocco.

Water management in the Atlas mountains, Morocco

In the Moroccan region of the Atlas mountains an increased pressure on water resources have been observed in recent years. The scarce river and groundwater levels are reduced by supplying the
growing population with drinking water and mainly for agricultural use. In addition to this, urbanization and the intensification of agriculture have increased the erosion and flooding problems.

Aims and objectives

The main objective of the project is to develop an optimized model based water management for
two big catchments (Tensift and Dades valley) in the region of the Atlas mountains. the Haouz catchment and Dades Valley in Morocco. Additionally IPS provides local agencies with planning tools (Software STORM) in the field of water resources management.Based on case studies, the different Watermangagement Agencies (ABH) will be also trained in the use of modern planning tools.

Set up run off models

The GIZ Morocco, the data of the IMPETUS project and the ABH Tensift delivered a huge database to set up the models. The data itself had to be prepared, classified, assessed (supported by Software programs, i.e. Geographical information Systems). For some data the runoff model needs daily or hourly values, like metrological data, were delivered data was not sufficient. Other sources were found, like the TRMM rain data with 3 hours resolution or temperature data. After the collection and preparation of the data they were imported into the runoff model STORM.
The STORM runoff model Haouz was finally set up and able to calculate the complete catchment. In order to calibrate the model, storm events of the past were studied, but as well general statistics of the river runoff.


The STORM models could finally be established and used for first runoff simulations. Although a calibration of extreme events could not be carried out, the general runoff behaviour shows reasonable results. It is possible to calculate runoff at many hydrological key points.

The main aspects of modern runoff modeling were implemented as follows:
•    Interpretation of soil parameters
•    Interpretation of landuse parameters
•    TRMM data (precipitation) were applied catchment wide. It was possible to simulate rain data of high resolution (15 years of 3h resolution) for the HAOUZ runoff model of 16.000km²
•    An implementation of temperature values (morning and afternoon) was realized and interpolated to the different climate regions within the catchment. This leads to a better calculation of the snow modul, integrated into STORM
•    The main Seqiuas coordinates were set up and included into STORM
•    Realization of many rural BMPs into the model (new developments of Software STORM)
•    Realization of infiltration parameters for river elements (new developments of Software STORM)






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Project information

Period: 2016 - 2017

Articles 1 Projects 1 Products 1
Dipl.-Geogr. Stephan Bandermann
+49 3342 3595-14
Prof. Dr.-Ing. Heiko Sieker
+49 3342 3595-0
Dr.-Ing. Mariusz Merta
+49 3342 3595-26
Gesellschaft für internationale Zusammenarbeit