Pioneering Groundwater Modelling in Kosovo with Limited Data Availability

Mario Roidt1, Argjend Hajra2, Randolf Rausch3
1 Dorsch International Consultants
2 Community Development Initiatives
3 Dorsch International Consultants, Technische Universität Darmstadt

2.10 in Wasserquantitäts- und qualitätsmodellierung auf regionaler Skale - Herausforderungen und neue Ansätze

27.03.2020, 16:45-17:00, Weißer Saal

In the past decade, the Rural Water and Sanitation Support Program in Kosovo (RWSSP) funded by the Swiss Agency for Development and Cooperation (SDC) and implemented by Dorsch International Consultants and Community Development Initiative has significantly increased the access to public water supply of the rural population of Kosovo. However, groundwater protection is still a challenge. While protecting wells with modelled groundwater protection zones, similar to German standards, is well described in the law, the implementation of modelling based zones is yet to be achieved. The programme is thus supporting the regional water companies of Kosovo to protect groundwater resources used for public water supply.

The publication describes how a hydrogeological model was established to understand groundwater flow in the Ferizaj southern well field in order to delineate the groundwater protection zones.

The well field is located in a north-south oriented plain formed by fluvial processes flanked by bedrock mountain ranges. A porous intergranular aquifer from unconsolidated sediments (sand, gravel, silt) with high and medium hydraulic permeability underlies the plain. The aquifer is recharged by groundwater recharge from precipitation and by inflow from the surrounding mountains. Therefore, the aquifer has favorable conditions for groundwater wells.

Five production wells that supply six villages are investigated with a total groundwater abstraction rate of 45 l/s.

The methodology especially focuses on achieving satisfactory result while modelling with Processing Modflow under limited data conditions. We aim to describe how the water demand was estimated due to a lack of water production data and how data from existing private wells were used to understand groundwater dynamics in the alluvial aquifer. We finally show how the inflow from the adjacent bedrocks to the alluvial aquifer was estimated by a simple modelling approach. The bedrock aquifer was approximated by a homogenous aquifer with a uniform groundwater recharge from precipitation. Constraints for the spatial groundwater head distribution in the bedrock aquifers were the elevation of existing springs and creeks which were simulated as drains. 

The results show how the groundwater flow model leads to satisfactory outcomes.



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