Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall Intensity
Despite the numerous contributions available in the literature about the wind-induced bias of rainfall intensity measurements, adjustments based on collection efficiency curves are rarely applied operationally to rain records obtained from catching-type rain gauges. The many influencing variables in...
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/12/3431 |
| _version_ | 1797416179851067392 |
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| author | Arianna Cauteruccio Luca G. Lanza |
| author_facet | Arianna Cauteruccio Luca G. Lanza |
| author_sort | Arianna Cauteruccio |
| collection | DOAJ |
| description | Despite the numerous contributions available in the literature about the wind-induced bias of rainfall intensity measurements, adjustments based on collection efficiency curves are rarely applied operationally to rain records obtained from catching-type rain gauges. The many influencing variables involved and the variability of the results of field experiments do not facilitate the widespread application of adjustment algorithms. In this paper, a Lagrangian particle tracking model is applied to the results of computational fluid dynamic simulations of the airflow field surrounding a rain gauge to derive a simple formulation of the collection efficiency curves as a function of wind speed. A new parameterization of the influence of rainfall intensity is proposed. The methodology was applied to a cylindrical gauge, which has the typical outer shape of tipping-bucket rain gauges, as a representative specimen of most operational measurement instruments. The wind velocity is the only ancillary variable required to calculate the adjustment, together with the measured rainfall intensity. Since wind is commonly measured by operational weather stations, its use adds no relevant burden to the cost of meteo-hydrological networks. |
| first_indexed | 2024-03-09T05:59:28Z |
| format | Article |
| id | doaj.art-f03b576414ab4168b6c9cc7f72d77e50 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T05:59:28Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-f03b576414ab4168b6c9cc7f72d77e502023-12-03T12:10:46ZengMDPI AGWater2073-44412020-12-011212343110.3390/w12123431Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall IntensityArianna Cauteruccio0Luca G. Lanza1Department of Civil, Chemical and Environmental Engineering, University of Genova,16145 Genoa, ItalyDepartment of Civil, Chemical and Environmental Engineering, University of Genova,16145 Genoa, ItalyDespite the numerous contributions available in the literature about the wind-induced bias of rainfall intensity measurements, adjustments based on collection efficiency curves are rarely applied operationally to rain records obtained from catching-type rain gauges. The many influencing variables involved and the variability of the results of field experiments do not facilitate the widespread application of adjustment algorithms. In this paper, a Lagrangian particle tracking model is applied to the results of computational fluid dynamic simulations of the airflow field surrounding a rain gauge to derive a simple formulation of the collection efficiency curves as a function of wind speed. A new parameterization of the influence of rainfall intensity is proposed. The methodology was applied to a cylindrical gauge, which has the typical outer shape of tipping-bucket rain gauges, as a representative specimen of most operational measurement instruments. The wind velocity is the only ancillary variable required to calculate the adjustment, together with the measured rainfall intensity. Since wind is commonly measured by operational weather stations, its use adds no relevant burden to the cost of meteo-hydrological networks.https://www.mdpi.com/2073-4441/12/12/3431rainwindCFDparticle trackingdrop size distributionrainfall intensity |
| spellingShingle | Arianna Cauteruccio Luca G. Lanza Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall Intensity Water rain wind CFD particle tracking drop size distribution rainfall intensity |
| title | Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall Intensity |
| title_full | Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall Intensity |
| title_fullStr | Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall Intensity |
| title_full_unstemmed | Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall Intensity |
| title_short | Parameterization of the Collection Efficiency of a Cylindrical Catching-Type Rain Gauge Based on Rainfall Intensity |
| title_sort | parameterization of the collection efficiency of a cylindrical catching type rain gauge based on rainfall intensity |
| topic | rain wind CFD particle tracking drop size distribution rainfall intensity |
| url | https://www.mdpi.com/2073-4441/12/12/3431 |
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