Layla Hashweh

Research themes
  • Institutions
Research countries
  • Kenya
Research projects
Wetlands in East Africa

B.Sc. in Agricultural Economics and Management & Environmental Studies (Hebrew University)


M.Sc. in Hydrology & Water Quality (Ben Gurion University)

Funding institutions


Thesis title

The hydrochemistry and hydrogeology of Ewaso Narok wetland in Kenya Modelling of a floodplain in a data-scarce environment

Thesis abstract

The study focuses on understanding the spatial-temporal dynamics of ground- and surface water Ewaso Narok, a wetland in Kenya. Ewaso Narok is one of four other wetlands that are being researched as part of the BMBF funded project “Wetlands in East Africa” where the main focus is to reconcile future food production with environmental protection. It determines the variability of water quality, evaluates water quality with respect to human consumption and food production, and tries to quantify and understand the proportion of groundwater and the sources of pollution within the wetland system.

Drought in the north of Kenya is driving people, mainly tribesman with their livestock, south. Human’s activity around the Ewaso Narok’s catchment is increasing and pollution is expected to increase as the wetland is vulnerable and will be altered in ways that could be hard to reverse. There has been no detailed hydrochemical or hydrogeological investigations and/or modelling of the pollutants fate in the Ewaso Narok catchment. Furthermore, the effect of intensification and use options on resource base quality changes is quantified in terms of hydrological and hydrogeological processes and water quality.

This was achieved by conducting surveys, sampling groundwater, stream water, flood water, and springs in a campaign conducted in 2016, which included in-situ measurements, major elements, trace elements, stable water isotopes, and rock/soil samples. These tests were performed to understand the aquifer, its constituents, and the chemical quality of the water. Geological records and well drillings are gathered and are being used to build geological and hydrogeological maps and cross-sections. The results of the water quality combined with the historical data will be used in a model to understand the trend of chemical evolution of pollutants by quantification along the stream and the wetland. The survey has provided an insight about the intensification and the change in management options on water quality. It has as well provided potential points of pollution input into the wetland.

Hydrochemical modelling will be used next to understand the evolution of chemical pollution in this data-scarce environment. Accordingly, appropriate management measures to reduce chemical pollution of the water will be developed to sustain the wetland’s short- and long-term functioning.

The results of the modelling will be used as input parameters in future crop growth simulation models and scenario building to assess wetlands, catchment, and regional agricultural production potentials.

This study will provide essential information to decision makers and locals to grow their food and use the wetland for daily consumption. It will identify and quantify the main sources and causes of chemical pollution, and hence help to develop appropriate management measures to reduce water chemical pollution.


Supervisors of
doctoral work

Prof. Dr. Barbara Reichert

There are no publications of this person.

Additionals, Curriculum Vitae
and Downloads

Layla Hashweh

Junior Researcher


Department :
ZEF C: Department of Ecology and Natural Resources Management