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Water 2019, 11(4), 766; https://doi.org/10.3390/w11040766

Experimental Investigation of Lateral Subsurface Flow Depending on Land Use and Soil Cultivation

1
Chair of Hydrology and River Basin Management, TUM Department of Civil, Geo and Environmental Engineering, Technical University of Munich, Arcisstraße 21, 80333 München, Germany
2
Flood Protection and Alpine Natural Hazards, Bavarian Environment Agency, Bürgermeister-Ulrich-Str. 160, 86179 Augsburg, Germany
*
Author to whom correspondence should be addressed.
Received: 19 March 2019 / Revised: 4 April 2019 / Accepted: 5 April 2019 / Published: 13 April 2019
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Abstract

The magnitude and timing of flood events are influenced by surface and subsurface flow generation as well as by present land use distribution. An integrated understanding of the interactions of soil properties, land use and flow generation is still missing. Therefore, field experiments are required to gain further knowledge about land use dependencies of discharge generation and concentration processes. In our research, we built an experimental setup consisting of three sites with similar soil and topographic conditions and different land use types (cropland, grassland, forest). The applied multimethod approach includes meteorological parameters, soil moisture, soil moisture tension, surface runoff, lateral subsurface flow, and stream discharge observations. The results show that low subsurface flow discharges more often occur at the cropland site, while large flow volumes were mainly observed at the grassland site. A correlation of the horizontal distribution of subsurface flow volumes and the accumulation areas of the surface topography has been found (r² = 0.76). The observed average response times for advective events increase from the forest site (6.0 h) to the grassland site (12.4 h) to the cropland site (20.9 h). Response times of convective events were shorter than 1 h at all sites. View Full-Text
Keywords: lateral subsurface flow; land use dependency; soil cultivation effects; hillslope hydrology; runoff generation; flow pathways; soil hydraulic properties; measurement network lateral subsurface flow; land use dependency; soil cultivation effects; hillslope hydrology; runoff generation; flow pathways; soil hydraulic properties; measurement network
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Teschemacher, S.; Rieger, W.; Disse, M. Experimental Investigation of Lateral Subsurface Flow Depending on Land Use and Soil Cultivation. Water 2019, 11, 766.

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