The Centre for the Study of Hydrogeological Processes

Dr Geol. Andis Kalvāns is the head of the Centre for the Study of Hydrogeological Processes. He is lead author of many scientific publications and leader of many fundamental and applied research projects. His research is mostly focused on interactions between groundwater, soil water and ecosystems. 

1. Collenteur, R. A., Haaf, E., Bakker, M., Liesch, T., Wunsch, A., Soonthornrangsan, J., White, J., Martin, N., Hugman, R., de Sousa, E., Vanden Berghe, D., Fan, X., Peterson, T. J., Bikše, J., Di Ciacca, A., Wang, X., Zheng, Y., Nölscher, M., Koch, J., Schneider, R., Benavides Höglund, N., Krishna Reddy Chidepudi, S., Henriot, A., Massei, N., Jardani, A., Rudolph, M. G., Rouhani, A., Gómez-Hernández, J. J., Jomaa, S., Pölz, A., Franken, T., Behbooei, M., Lin, J., and Meysami, R.: Data-driven modelling of hydraulic-head time series: results and lessons learned from the 2022 Groundwater Time Series Modelling Challenge, Hydrol. Earth Syst. Sci., 28, 5193–5208, (2024): https://doi.org/10.5194/hess-28-5193-2024 
2. Bikše, Jānis, Inga Retike, Ezra Haaf, and Andis Kalvāns. ‘Assessing Automated Gap Imputation of Regional Scale Groundwater Level Data Sets with Typical Gap Patterns’. Journal of Hydrology 620 (May 2023): 129424. https://doi.org/10.1016/j.jhydrol.2023.129424. 
3. Babre, Alise, Andis Kalvāns, Zanita Avotniece, Inga Retiķe, Jānis Bikše, Marta Jemeljanova, Konrāds Popovs, Artjoms Zelenkevičs, and Aija Dēliņa. ‘The Use of Predefined Drought Indices for the Assessment of Groundwater Drought Episodes in the Baltic States over the Period 1989–2018’. Journal of Hydrology: Regional Studies 40, no. March (April 2022): 101049. https://doi.org/10.1016/j.ejrh.2022.101049. 
4. Retike, I., Bikše, J., Kalvāns, A., Dēliņa, A., Avotniece, Z., Zaadnoordijk, W. J., Jemeljanova, M., Popovs, K., Babre, A., Zelenkevičs, A., Baikovs, A. Rescue of groundwater level time series: How to visually identify and treat errors. Journal of Hydrology, 605, 127294. (2022): https://doi.org/10.1016/j.jhydrol.2021.127294 
5. Kalvāns, Andis, Konrāds Popovs, Agnese Priede, Oliver Koit, Inga Retiķe, Jānis Bikše, Aija Dēliņa, and Alise Babre. ‘Nitrate Vulnerability of Karst Aquifers and Associated Groundwater-Dependent Ecosystems in the Baltic Region’. Environmental Earth Sciences 80, no. 18 (2021): 628. https://doi.org/10.1007/s12665-021-09918-7. 
6. Kalvāns, Andis, Aija Dēliņa, Alise Babre, and Konrāds Popovs. ‘An Insight into Water Stable Isotope Signatures in Temperate Catchment’. Journal of Hydrology 582, no. December 2019 (2020): 1–12. https://doi.org/10.1016/j.jhydrol.2019.124442. 

Peatland restoration for greenhouse gas emission reduction and carbon sequestration in the Baltic Sea region, LIFE21 - CCM - LV - LIFE - PeatCarbon, European Commission LIFE Programme Climate Change mitigation Programme Project, 2022-2027: Geological and hydrological investigation and monitoring of the project sites  

Survey of the areas to be restored and assessment of the hydrological and vegetation monitoring status in the project areas, the commissioning party AS “Latvian State Forests”, 2025-2029. Assessment and monitoring of the hydrological status of five degraded marshes. 

Soil and groundwater regime study in Grīvu sala, Balvu county, 2024, commissioning party GMBH aeco, Germany: establishment of non-stationary groundwater level hydrogeological model 

Ensuring water Availability in a Changing Climate, 2025, International Atomic Energy Agency project RER7017 

EU-integrated management system of cross-border groundwater resources and anthropogenic hazards (EU-WATERRES), 2020-2023 of the Programme “Funds for Regional Cooperation” of the European Economic area and the Norwegian Financial Mechanism.