Dr. Ulf Mallast
Contact
Department Monitoring- and Exploration Technologies
eLTER Head Office
Helmholtz Centre for Environmental Research- UFZ
Permoserstr. 15
04318 Leipzig
Tel: +49 (0) 341 6025 1553
Fax: +49 (0) 341 235 451553
Research interests
- Application of remote sensing to scale in-situ data (greenhouse gas emissions, soil moisture, surface temperature, vegetation, etc.)
- Standardised application of UAVs for marine and terrestrial monitoring
- Coupling of spatially explicit satellite- and UAV-based SST analyses (mono- and multi-temporal) with hydrochemical in-situ data (222Rn, 18O, 2H) to detect and characterize submarine groundwater discharge (SGD)
Academic background
since 03/2024
Lead of WP1 within the EU Horizon Europe Project "eLTER EnRich" at the Helmholtz Centre for Environmental Research - UFZ / eLTER Head Office
since 04/2024
Lead of the Service Portfolio Development of eLTER
06/2022-04/2024
Lead of WP7 (Transnational Access) within the EU H2020 Project "eLTER PLUS" at the Helmholtz Centre for Environmental Research - UFZ / eLTER Head Office
11/2019-04/2023
ShowCase co-lead of SC4 within the EU H2020 Project "e-shape" at the Helmholtz Centre for Environmental Research - UFZ / eLTER Head Office
10/2017-
12/2017
DFG Merctor Fellow within the DFG Research Training Group "Baltic Transcoast"
01/2016-
03/2016
YSEP research fellow at the Geological Survey of Israel
01/2013-
10/2019
PostDoc at the Helmholtz Centre for Environmental Research - UFZ
02/2009-
01/2013
Dr. rer. nat (PhD) in Remote Sensing; PhD thesis "Current status and long-term insights into the western Dead Sea groundwater system using multi-sensoral remote sensing"
04/2008-
10/2008
Study at the Institute of Geography, University of Leipzig; Diploma thesis "A hydrological event modeling of the Río Maipo watershed (Chile) based on remote sensing data"
Publications
2024 (7)
- Böttcher, M.E., Mallast, U., Massmann, G., Moosdorf, N., Müller-Petke, M., Waska, H. (2024):
Coastal–groundwater interfaces (submarine groundwater discharge)
In: Krause, S., Hannah, D.M., Grimm, N.B. (eds.)
Ecohydrological interfaces
Wiley, Hoboken, NJ, p. 123 - 147 10.1002/9781119489702.ch6 - Gupta, S.K., Schulze, F., Gründling, R., Mallast, U. (2024):
Drone4Tree: A cloud-based geospatial platform for large-scale UAV data processing and tree canopy detection
EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024
EGUsphere
Copernicus Publications, EGU24-18370 10.5194/egusphere-egu24-18370 - Ohnemus, T., Zacharias, S., Dirnböck, T., Bäck, J., Brack, W., Forsius, M., Mallast, U., Nikolaidis, N.P., Peterseil, J., Piscart, C., Pando, F., Poppe Terán, C., Mirtl, M. (2024):
The eLTER research infrastructure: Current design and coverage of environmental and socio-ecological gradients
Environ. Sustain. Indic. 23 , art. 100456 10.1016/j.indic.2024.100456 - Siebert, C., Ionescu, D., Mallast, U., Merchel, S., Merkel, B., Möller, P., Pavetich, S., Pohl, T., Rödiger, T., Yechieli, Y. (2024):
A new type of submarine chimneys built of halite
Sci. Total Environ. 955 , art. 176752 10.1016/j.scitotenv.2024.176752 - Spinosa, A., Eleveld, M., Mallast, U., Peterseil, J., Mobilia, V., Karisma, K., Fuentes-Monjaraz, M.A., El Serafy, G. (2024):
Automated gross primary production application for monitoring ecosystem health within GEOSS
2024 IEEE International Geoscience and Remote Sensing Symposium, Athens, Greece, 07-12 July 2024
International Geoscience and Remote Sensing Symposium IGARSS 2024
Institute of Electrical and Electronics Engineers (IEEE), New York, NY, p. 4544 - 4547 10.1109/IGARSS53475.2024.10642481 - Tessema, T., Mortimer, D., Gupta, S.K., Mallast, U., Uzor, S., Tosti, F. (2024):
Urban green infrastructure monitoring using remote sensing techniques
In: Schulz, K., Michel, U., Nikolakopoulos, K.G. (eds.)
Earth Resources and Environmental Remote Sensing/GIS Applications XV, Edinburgh, United Kingdom, 16-19 September 2024
Proceedings / SPIE 13197
SPIE, Bellingham, WA, p. 131970Z 10.1117/12.3034031 - Zill, J., Perujo, N., Fink, P., Mallast, U., Siebert, C., Weitere, M. (2024):
Contribution of groundwater-borne nutrients to eutrophication potential and the share of benthic algae in a large lowland river
Sci. Total Environ. 951 , art. 175617 10.1016/j.scitotenv.2024.175617
2023 (3)
- Arévalo-Martínez, D.L., Haroon, A., Bange, H.W., Erkul, E., Jegen, M., Moosdorf, N., Schneider von Deimling, J., Berndt, C., Böttcher, M.E., Hoffmann, J., Liebetrau, V., Mallast, U., Massmann, G., Micallef, A., Michael, H.A., Paasche, H., Rabbel, W., Santos, I., Scholten, J., Schwalenberg, K., Szymczycha, B., Thomas, A.T., Virtasalo, J.J., Waska, H., Weymer, B.A. (2023):
Ideas and perspectives: Land–ocean connectivity through groundwater
Biogeosciences 20 (3), 647 - 662 10.5194/bg-20-647-2023 - Zill, J., Siebert, C., Rödiger, T., Schmidt, A., Gilfedder, B.S., Frei, S., Schubert, M., Weitere, M., Mallast, U. (2023):
A way to determine groundwater contributions to large river systems: The Elbe River during drought conditions
J. Hydrol. Reg. Stud. 50 , art. 101595 10.1016/j.ejrh.2023.101595 - Zill, J., Siebert, C., Weitere, M., Mallast, U. (2023):
Diffuse nutrient input to large rivers: quantifying the dimension of groundwater discharge and its effects on riverine eutrophication in the Elbe
Extreme hydrologische Ereignisse und deren Folgen im Einzugsgebiet der Elbe. Magdeburger Gewässerschutzseminar 2023 = Magdeburský seminář o ochraně vod 2023, 11.–12.10.2023
Povodí Ohře (státní podnik), Chomutov, p. 175 - 176
2022 (1)
- Lausch, A., Schaepman, M.E., Skidmore, A.K., Catana, E., Bannehr, L., Bastian, O., Borg, E., Bumberger, J., Dietrich, P., Glässer, C., Hacker, J.M., Höfer, R., Jagdhuber, T., Jany, S., Jung, A., Karnieli, A., Klenke, R., Kirsten, T., Ködel, U., Kresse, W., Mallast, U., Montzka, C., Möller, M., Mollenhauer, H., Pause, M., Rahman, M., Schrodt, F., Schmullius, C., Schütze, C., Selsam, P., Syrbe, R.-U., Truckenbrodt, S., Vohland, M., Volk, M., Wellmann, T., Zacharias, S., Baatz, R. (2022):
Remote sensing of geomorphodiversity linked to biodiversity — Part III: Traits, processes and remote sensing characteristics
Remote Sens. 14 (9), art. 2279 10.3390/rs14092279
2021 (2)
- Moosdorf, N., Böttcher, M.E., Adyasari, D., Erkul, E., Gilfedder, B.S., Greskowiak, J., Jenner, A.-K., Kotwicki, L., Massmann, G., Müller-Petke, M., Oehler, T., Post, V., Prien, R., Scholten, J., Siemon, B., Ehlert von Ahn, C.M., Walther, M., Waska, H., Wunderlich, T., Mallast, U. (2021):
A state-of-the-art perspective on the characterization of subterranean estuaries at the regional scale
Front. Earth Sci. 9 , art. 601293 10.3389/feart.2021.601293 - Nylund, A.T., Arneborg, L., Tengberg, A., Mallast, U., Hassellöv, I.-M. (2021):
In situ observations of turbulent ship wakes and their spatiotemporal extent
Ocean Sci. 17 (5), 1285 - 1302 10.5194/os-17-1285-2021
2020 (4)
- Mallast, U., Staniek, M., Koschorreck, M. (2020):
Spatial upscaling of CO2 emissions from exposed river sediments of the Elbe River during an extreme drought
Ecohydrology 13 (6), e2216 10.1002/eco.2216 - Mallast, U., Waska, H., Moosdorf, N. (2020):
Königshafen submarine groundwater discharge network (KiSNet)
EGU General Assembly, EGU2020, Online, 4-8 May 2020
EGUsphere
Copernicus Publications, EGU2020-5424 10.5194/egusphere-egu2020-5424 - Rödiger, T., Magri, F., Geyer, S., Mallast, U., Odeh, T., Siebert, C. (2020):
Calculating man-made depletion of a stressed multiple aquifer resource on a national scale
Sci. Total Environ. 725 , art. 138478 10.1016/j.scitotenv.2020.138478 - Wilske, C., Suckow, A., Mallast, U., Meier, C., Merchel, S., Merkel, B., Pavetich, S., Rödiger, T., Rugel, G., Sachse, A., Weise, S.M., Siebert, C. (2020):
A multi-environmental tracer study to determine groundwater residence times and recharge in a structurally complex multi-aquifer system
Hydrol. Earth Syst. Sci. 24 (1), 249 - 267 10.5194/hess-24-249-2020
2019 (2)
- Mallast, U., Siebert, C. (2019):
Combining continuous spatial and temporal scales for SGD investigations using UAV-based thermal infrared measurements
Hydrol. Earth Syst. Sci. 23 (3), 1375 - 1392 10.5194/hess-23-1375-2019 - Mallast, U., Siebert, C. (2019):
UAV in combination with a thermal infrared sensor for the use in groundwater research
21st EGU General Assembly, EGU2019, Proceedings from the conference held 7-12 April, 2019 in Vienna, Austria
Geophysical Research Abstracts 21
European Geosciences Union (EGU), EGU2019-15129
2018 (1)
- Oehler, T., Eiche, E., Putra, D., Adyasari, D., Hennig, H., Mallast, U., Moosdorf, N. (2018):
Seasonal variability of land-ocean groundwater nutrient fluxes from a tropical karstic region (southern Java, Indonesia)
J. Hydrol. 565 , 662 - 671 10.1016/j.jhydrol.2018.08.077
2017 (3)
- Oehler, T., Eiche, E., Putra, D., Adyasari, D., Hennig, H., Mallast, U., Moosdorf, N. (2017):
Timing of land–ocean groundwater nutrient fluxes from a tropical karstic region (southern Java, Indonesia)
Hydrol. Earth Syst. Sci. Discuss. 10.5194/hess-2017-621 - Schubert, M., Knöller, K., Stollberg, R., Mallast, U., Ruzsa, G., Melikadze, G. (2017):
Evidence for submarine groundwater discharge into the Black Sea—investigation of two dissimilar geographical settings
Water 9 (7), art. 468 10.3390/w9070468 - Siebert, C., Merkel, B., Pohl, T., Yechieli, Y., Hazan, E., Ionescu, D., Mallast, U. (2017):
New types of submarine groundwater discharge from a saliferous clay formation – the case of the Dead Sea
EGU General Assembly 2017, Vienna, Austria, 23–28 April 2017
Geophysical Research Abstracts 19
European Geosciences Union (EGU), EGU2017-14991
2016 (2)
- Kottmeier, C., Agnon, A., Al-Halbouni, D., Alpert, P., Corsmeier, U., Dahm, T., Eshel, A., Geyer, S., Haas, M., Holohan, E., Kalthoff, N., Kishcha, P., Krawczyk, C., Lati, J., Laronne, J.B., Lott, F., Mallast, U., Merz, R., Metzger, J., Mohsen, A., Morin, E., Nied, M., Rödiger, T., Salameh, E., Sawarieh, A., Shannak, B., Siebert, C., Weber, M. (2016):
New perspectives on interdisciplinary earth science at the Dead Sea: The DESERVE project
Sci. Total Environ. 544 , 1045 - 1058 10.1016/j.scitotenv.2015.12.003 - Siebert, C., Rödiger, T., Geyer, S., Laronne, J.B., Hillel, N., Sauter, M., Mallast, U. (2016):
Multidisciplinary investigations of the transboundary Dead Sea basin and its water resources
In: Borchardt, D., Bogardi, J., Ibisch, R.B. (eds.)
Integrated water resources management: concept, research and implementation
Springer, Basel, p. 107 - 127 10.1007/978-3-319-25071-7_5
2015 (2)
- Schulz, S., Horovitz, M., Rausch, R., Michelsen, N., Mallast, U., Köhne, M., Siebert, C., Schüth, C., Al-Saud, M., Merz, R. (2015):
Groundwater evaporation from salt pans: examples from the eastern Arabian Peninsula
J. Hydrol. 531 (Part 3), 792 - 801 10.1016/j.jhydrol.2015.10.048 - Siebert, C., Merkel, B., Pohl, T., Ionescu, D., Mallast, U. (2015):
Exploration of SGD structures by remote sensing technologies and aquatic geochemistry
EGU General Assembly 2015, Vienna, Austria, 12–17 April 2015
Geophysical Research Abstracts 17
European Geosciences Union (EGU), EGU2015-3686
2014 (6)
- Mallast, U., Gloaguen, R., Friesen, J., Rödiger, T., Geyer, S., Merz, R., Siebert, C. (2014):
How to identify groundwater-caused thermal anomalies in lakes based on multi-temporal satellite data in semi-arid regions
Hydrol. Earth Syst. Sci. 18 (7), 2773 - 2787 10.5194/hess-18-2773-2014 - Rödiger, T., Geyer, S., Mallast, U., Merz, R., Krause, P., Fischer, C., Siebert, C. (2014):
Multi-response calibration of a conceptual hydrological model in the semiarid catchment of Wadi al Arab, Jordan
J. Hydrol. 509 , 193 - 206 10.1016/j.jhydrol.2013.11.026 - Schubert, M., Scholten, J., Schmidt, A., Comanducci, J.F., Pham, M.K., Mallast, U., Knoeller, K. (2014):
Submarine groundwater discharge at a single spot location: evaluation of different detection approaches
Water 6 (3), 584 - 601 10.3390/w6030584 - Siebert, C., Mallast, U., Rödiger, T., Ionescu, D., Schwonke, F., Hall, J.K., Sade, A.R., Pohl, T., Merkel, B. (2014):
Multiple sensor tracking of submarine groundwater discharge: concept study along the Dead Sea
EGU General Assembly 2014, Vienna, Austria, 27 April–02 May 2014
Geophysical Research Abstracts 16
European Geosciences Union (EGU), EGU2014-11217 - Siebert, C., Mallast, U., Rödiger, T., Strey, M., Ionescu, D., Häusler, S., Noriega, B., Pohl, T., Merkel, B. (2014):
Submarine groundwater discharge at the Dead Sea
In: Wiederhold, H., Michaelsen, J., Hinsby, K., Nommensen, B. (eds.)
SWIM 2014 : 23rd Salt Water Intrusion Meeting; Programme and Proceedings
Leibniz-Institut für Angewandte Geophysik, Hannover, p. 366 - 370 - Siebert, C., Rödiger, T., Mallast, U., Gräbe, A., Guttman, J., Laronne, J.B., Storz-Peretz, Y., Greenman, A., Salameh, E., Al-Raggad, M., Vachtman, D., Zvi, A.B., Ionescu, D., Brenner, A., Merz, R., Geyer, S. (2014):
Challenges to estimate surface- and groundwater flow in arid regions: The Dead Sea catchment
Sci. Total Environ. 485-486 , 828 - 841 10.1016/j.scitotenv.2014.04.010
2013 (3)
- Mallast, U., Schwonke, F., Gloaguen, R., Geyer, S., Sauter, M., Siebert, C. (2013):
Airborne thermal data identifies groundwater discharge at the north-western coast of the Dead Sea
Remote Sens. 5 (12), 6361 - 6381 10.3390/rs5126361 - Mallast, U., Siebert, C., Schwonke, F., Gloaguen, R., Rödiger, T., Geyer, S., Sauter, M., Merz, R. (2013):
Airborne thermal data reveal groundwater discharge at the north-western coast of the Dead Sea
EGU General Assembly 2013, Vienna, Austria, 07–12 April 2013
Geophysical Research Abstracts 15
European Geosciences Union (EGU), EGU2013-5586 - Mallast, U., Siebert, C., Wagner, B., Sauter, M., Gloaguen, R., Geyer, S., Merz, R. (2013):
Localisation and temporal variability of groundwater discharge into the Dead Sea using thermal satellite data
Environ. Earth Sci. 69 (2), 587 - 603 10.1007/s12665-013-2371-6
2012 (2)
- Mallast, U., Siebert, C., Gloaguen, R., Wagner, B., Schwonke, F., Rödiger, T., Geyer, S., Krieg, R., Sauter, M., Kühn, F., Merz, R. (2012):
Remote sensing application possibilities on groundwater characterization in arid regions at the example of the Dead Sea
EGU General Assembly 2012, Vienna, Austria, 22–27 April 2012
Geophysical Research Abstracts 14
European Geosciences Union (EGU), EGU2012-5273 - Mallast, U., Siebert, C., Schwonke, F., Wagner, B., Rödiger, T., Geyer, S., Gloaguen, R., Sauter, M., Kühn, F., Merz, R. (2012):
Application of thermal data for groundwater studies in arid regions at the example of the Dead Sea
In: Rausch, R., Schüth, C., Himmelsbach, T. (eds.)
Hydrogeology of arid environments : proceedings ; [results of the Conference "Hydrogeology of Arid Environments", March 2012 in Hannover (Germany)]
Borntraeger, Stuttgart, p. 84 - 88
2011 (2)
- Mallast, U., Gloaguen, R., Geyer, S., Rödiger, T., Siebert, C. (2011):
Derivation of groundwater flow-paths based on semi-automatic extraction of lineaments from remote sensing data
Hydrol. Earth Syst. Sci. 15 (8), 2665 - 2678 10.5194/hess-15-2665-2011 - Mallast, U., Schwonke, F., Siebert, C., Maraschek, U., Kemper, G., Geyer, S., Kühn, F. (2011):
Hochauflösende flugzeuggestützte Thermalfernerkundung zur Kartierung submariner und terrestrischer Grundwasserquellen in der hochsalinaren Uferzone des Toten Meeres. Erste Ergebnisse von Befliegungskampagnen am Westufer des Toten Meeres im Januar 2011
In: Seyfert, E. (Hrsg.)
Geodaten – eine Ressource des 21. Jahrhunderts. Vorträge 31. Wissenschaftlich-Technische Jahrestagung der DGPF, 13. - 15. April 2011 in Mainz
Publikationen der Deutschen Gesellschaft für Photogrammetrie, Fernerkundung und Geoinformation e.V. 20
Geschäftsstelle der DGPF, Münster, 1 - 10