4 results on '"Anys, Markus"'
Search Results
2. Rainfall interception by urban trees: Event characteristics and tree morphological traits.
- Author
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Anys, Markus and Weiler, Markus
- Subjects
URBAN trees ,URBAN runoff management ,LEAF area index ,URBAN hydrology ,LIME (Fruit) ,THROUGHFALL ,RAINFALL - Abstract
The rapid expansion of impermeable surfaces in cities has a major impact on urban hydrology by reducing rainwater infiltration and increasing runoff rates and peaks. The use of urban trees as stormwater management tools is gaining recognition for their potential to mitigate flood risk and provide additional ecosystem services. We conducted an in-situ field experiment to measure throughfall on Norway maple (Acer platanoides) and small-leaved lime (Tilia cordata) to assess the interception capacity of solitary urban trees under different degrees of surface sealing in the city of Freiburg, Germany. We examined the relationships between rainfall characteristics, tree morphological traits, and the interception behaviour, analysing eight trees per species over 76 recorded rainfall events from April to September 2021. Average interception values were higher for small-leaved lime trees (70.3% ± 6.6%) than for Norway maple (54.8% ± 10.3%) surpassing those in typical forested environments. The average interception loss of all recorded events was 2.6 ± 0.6 mm for Norway maple and 3.7 ± 0.3 mm for small-leaved lime. For both tree species, significant linear correlations were found between the relative interception and factors such as rainfall depths, the leaf area index (LAI), and the plant area index (PAI) (adj. R2 >0.45). Unlike Norway maple, small-leaved lime demonstrated significant relationships between several tree morphological parameters and interception (adj. R2 >0.43). The LAI of both species significantly decreased with the increasing degree of surface sealing, which in turn affected interception rates. Our results enhance the understanding of the interception process by solitary trees in urban contexts and enables the parameterization of interception rates using measurable properties. To develop a comprehensive database for modelling parameters and aid urban planners in stormwater management, further field experiments involving various tree species are essential. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Where should hydrology go? An early-career perspective on the next IAHS Scientific Decade: 2023–2032
- Author
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van Hateren, Theresa C., Jongen, Harro J., Al-Zawaidah, Hadeel, Beemster, Joris G. W., Boekee, Judith, Bogerd, Linda, Gao, Sijia, Kannen, Christin, van Meerveld, Ilja, de Lange, Sjoukje I., Linke, Felicia, Pinto, Rose B., Remmers, Janneke O. E., Ruijsch, Jessica, Rusli, Steven R., van de Vijsel, Roeland C., Aerts, Jerom P. M., Agoungbome, Sehouevi M. D., Anys, Markus, Blanco Ramírez, Sara, van Emmerik, Tim, Gallitelli, Luca, Chiquito Gesualdo, Gabriela, Gonzalez Otero, Wendy, Hanus, Sarah, He, Zixiao, Hoffmeister, Svenja, Imhoff, Ruben O., Kerlin, Tim, Meshram, Sumit M., Meyer, Judith, Meyer Oliveira, Aline, Müller, Andreas C. T., Nijzink, Remko, Scheller, Mirjam, Schreyers, Louise, Sehgal, Dhruv, Tasseron, Paolo F., Teuling, A. J., Teuling, Adriaan J., Trevisson, Michele, Waldschläger, Kryss, Walraven, Bas, Wannasin, Chanoknun, Wienhöfer, Jan, Zander, Mar J., Zhang, Shulin, Zhou, Jingwei, Zomer, Judith Y., and Zwartendijk, Bob W.
- Subjects
water services ,Earth sciences ,WIMEK ,water cycle intensification ,tipping points ,ddc:550 ,Life Science ,Water Systems and Global Change ,early-career scientists ,IAHS Scientific Decade ,Hydrology and Quantitative Water Management ,Water Science and Technology ,Hydrologie en Kwantitatief Waterbeheer - Abstract
This paper shares an early-career perspective on potential themes for the upcoming International Association of Hydrological Sciences (IAHS) scientific decade (SD). This opinion paper synthesizes six discussion sessions in western Europe identifying three themes that all offer a different perspective on the hydrological threats the world faces and could serve to direct the broader hydrological community: “Tipping points and thresholds in hydrology”, “Intensification of the water cycle”, and “Water services under pressure”. Additionally, four trends were distinguished concerning the way in which hydrological research is conducted: big data, bridging science and practice, open science, and inter- and multidisciplinarity. These themes and trends will provide valuable input for future discussions on the theme for the next IAHS SD. We encourage other Early-Career Scientists to voice their opinion by organizing their own discussion sessions and commenting on this paper to make this initiative grow from a regional initiative to a global movement.
- Published
- 2023
4. Estimation of Leaf Area Index with a Multi-Channel Spectral Micro-Sensor for Wireless Sensing Networks.
- Author
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Comella, Laura Maria, Bregler, Florian, Hager, Eiko, Anys, Markus, Klueppel, Johannes, Rupitsch, Stefan J., Werner, Christiane, and Woias, Peter
- Subjects
LEAF area index ,CROWNS (Botany) ,SOLAR cells ,TREE planting ,SOLAR energy ,AIRBORNE lasers ,TREE growth - Abstract
The leaf area index (LAI) is a key parameter in the context of monitoring the development of tree crowns and plants in general. As parameters such as carbon assimilation, environmental stress on carbon, and the water fluxes within tree canopies are correlated to the leaves surface, this parameter is essential for understanding and modeling ecological processes. However, its continuous monitoring using manual state-of-the-art measurement instruments is still challenging. To address this challenge, we present an innovative sensor concept to obtain the LAI based on the cheap and easy to integrate multi-channel spectral sensor AS7341. Additionally, we present a method for processing and filtering the gathered data, which enables very high accuracy measurements with an nRMSE of only 0.098, compared to the manually-operated state-of-the-art instrument LAI-2200C (LiCor). The sensor that is embedded on a sensor node has been tested in long-term experiments, proving its suitability for continuous deployment over an entire season. It permits the estimation of both the plant area index (PAI) and leaf area index (LAI) and provides the first wireless system that obtains the LAI solely powered by solar cells. Its energy autonomy and wireless connectivity make it suitable for a massive deployment over large areas and at different levels of the tree crown. It may be upgraded to allow the parallel measurement of photosynthetic active radiation (PAR) and light quality, relevant parameters for monitoring processes within tree canopies. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
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