Title
Screening of representative rainfall event series for long-term hydrological performance evaluation of grassed swales
Author
Yang, F. (TU Delft Hydraulic Structures and Flood Risk; Southeast University)
Fu, Dafang (Southeast University)
Zevenbergen, C. (TU Delft Urban Design) 
Boogaard, Floris C. (Hanze Hogeschool Groningen; Deltares)
Singh, Rajendra Prasad (Southeast University)
Date
2024
Abstract
Evaluation of the hydrological performance of grassed swales usually needs long-term monitoring data. At present, suitable techniques for simulating the hydrological performance using limited monitoring data are not available. Therefore, current study aims to investigate the relationship between saturated hydraulic conductivity (Ks) fitting results and rainfall characteristics of various events series length. Data from a full-scale grassed swale (Enschede, the Netherlands) were utilized as long-term rainfall event series length (95 rainfall events) on the fitting outcomes. Short-term rainfall event series were extracted from these long-term series and used as input in fitting into a multivariate nonlinear model between Ks and its influencing rainfall indicators (antecedent dry days, temperature, rainfall, rainfall duration, total rainfall, and seasonal factor (spring, summer, autumn, and winter, herein refer as 1, 2, 3, and 4). Comparison of short-term and long-term rainfall event series fitting results allowed to obtain a representative short-term series that leads to similar results with those using long-term series. A cluster analysis was conducted based on the fitting results of the representative rainfall event series with their rainfall event characteristics using average values of influencing rainfall indicators. The seasonal index (average value of seasonal factors) was found to be the most representative short rainfall event series indicator. Furthermore, a Bayesian network was proposed in the current study to predict if a given short-term rainfall event series is representative. It was validated by a data series (58 rainfall events) from another full-scale grassed swale located in Utrecht, the Netherlands. Results revealed that it is quite promising and useful to evaluate the representativeness of short-term rainfall event series used for long-term hydrological performance evaluation of grassed swales. Graphical Abstract: (Figure presented.).
Subject
Bayesian network
Grassed swale
Long-term hydrological performance
Rainfall event series
Representativeness
Saturated hydraulic conductivity
To reference this document use:
http://resolver.tudelft.nl/uuid:0a950056-8081-48e7-ad1f-117eeb2066f6
DOI
https://doi.org/10.1007/s11356-024-32355-5
Embargo date
2024-08-23
ISSN
0944-1344
Source
Environmental Science and Pollution Research
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 F. Yang, Dafang Fu, C. Zevenbergen, Floris C. Boogaard, Rajendra Prasad Singh