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Open AccessFeature PaperArticle

An Enhanced Data Processing Framework for Mapping Tree Root Systems Using Ground Penetrating Radar

1
School of Computing and Engineering, University of West London (UWL), St Mary’s Road, Ealing, London W5 5RF, UK
2
Department of Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Roma, Italy
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(20), 3417; https://doi.org/10.3390/rs12203417
Received: 11 August 2020 / Revised: 13 October 2020 / Accepted: 14 October 2020 / Published: 18 October 2020
The preservation of natural assets is nowadays an essential commitment. In this regard, root systems are endangered by fungal diseases which can undermine the health and stability of trees. Within this framework, ground penetrating radar (GPR) is emerging as a reliable non-destructive method for root investigation. A coherent GPR-based root-detection framework is presented in this paper. The proposed methodology is a multi-stage data analysis system that is applied to semi-circular measurements collected around the investigated tree. In the first step, the raw data are processed by applying several standard and advanced signal processing techniques in order to reduce noise-related information. In the second stage, the presence of any discontinuity element within the survey area is investigated by analysing the signal reflectivity. Then, a tracking algorithm aimed at identifying patterns compatible with tree roots is implemented. Finally, the mass density of roots is estimated by means of continuous functions in order to achieve a more realistic representation of the root paths and to identify their length in a continuous and more realistic domain. The method was validated in a case study in London (UK), where the root system of a real tree was surveyed using GPR and a soil test pit was excavated for validation purposes. Results support the feasibility of the data processing framework implemented in this study. View Full-Text
Keywords: assessment of tree roots; ground-penetrating radar (GPR); tree root mapping; tree root mass density; multi-stage data processing framework assessment of tree roots; ground-penetrating radar (GPR); tree root mapping; tree root mass density; multi-stage data processing framework
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MDPI and ACS Style

Lantini, L.; Tosti, F.; Giannakis, I.; Zou, L.; Benedetto, A.; Alani, A.M. An Enhanced Data Processing Framework for Mapping Tree Root Systems Using Ground Penetrating Radar. Remote Sens. 2020, 12, 3417.

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