Kurikka aquifer project 11

Introduction

Geological Survey of Finland (GTK), in collaboration with the Centre for Economic Development, Transport and the Environment of South Ostrobothnia (ELY Centre), is continuing advanced hydrogeological investigations in the Kurikka region. The primary objectives of the project are to quantify groundwater formation in the area, assess the long-term sustainability of groundwater abstraction, and evaluate protective measures. These goals will be pursued primarily through numerical groundwater flow modeling, integrating all previously collected datasets. Notably, the project does not involve any new fieldwork activities.

GTK’s groundwater research efforts in the area began approximately 15 years ago, focusing initially on the Aronlähde and Kuusistonloukko groundwater zones. Early geological investigations revealed thick sequences of sand and gravel separated by moraine layers found from bedrock depressions. Subsequent studies have confirmed that the region is characterized by unusually thick and geologically complex surficial deposits. In addition, the highly fractured bedrock contributes to increased groundwater storage capacity. Groundwater formation occurs across a broad spatial extent, and the quality of the deep groundwater has been found to be generally high. Furthermore, the aquifers are well protected beneath substantial clay formations, enhancing their resilience against surface contamination.

Partner: ELY Centre of South Ostrobothnia

The coordinator of the project: GTK

Funding authority: GTK and the ELY Centre of South Ostrobothnia

Contact person: Niko Putkinen

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