Analysis of Joss-Waldvogel disdrometer measurements in rainfall events

Feloni, Elissavet; Kotsifakis, Konstantinos; Dervos, N. A.; Giavis, George; Baltas, Evangelos

doi:10.1117/12.2279610

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…This has, in fact, often been found. Feloni et al [103] found an underestimate of 2% in JWD data. In comparing the Parsivel optical disdrometer with TBRG data, both aggregated to hourly data, the disdrometer was underestimated by 30%.…”

Section: Disdrometers-optical and Electro-mechanical Drop Sizing Coun...mentioning

confidence: 94%

Recording Rainfall Intensity: Has an Optimum Method Been Found?

Dunkerley

2023

Water

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Many design principles for rain gauges that have the capacity to record rainfall intensity have been proposed or developed. These are here grouped into 15 categories, and the abilities and limitations of each are discussed. No standard or optimum method has emerged, despite more than 80 years of effort in the last two centuries, together with prior work from the 17th C onwards. Indeed, new methods continue to be explored for both point-based and area-wide collections of intensity data. Examples include the use of signal attenuation by rain along the tower-to-tower links of cellular phone networks, monitoring the speed of vehicle windscreen wipers, and exploiting the sound or vision from security and traffic-monitoring cameras. Many of these approaches have the potential to provide vastly more observation sites than conventional meteorological stations equipped with rain gauges. Some of these contemporary approaches seek to harness the potential of crowdsourced or citizen-science data. It is hoped that the present overview of methods will provide a guide for those wishing to collect or analyses rainfall intensity data for application in areas such as soil erosion processes, ecohydrology, agrochemical washoff, or urban flash flooding. Because rainfall intensity is one of the key aspects of the hydrologic cycle likely to respond as climate change and variability proceed, the choice of appropriate data collection methods has additional contemporary importance for the monitoring of regional and global precipitation changes.

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Section: Disdrometers-optical and Electro-mechanical Drop Sizing Coun...mentioning

confidence: 94%

Recording Rainfall Intensity: Has an Optimum Method Been Found?

Dunkerley

2023

Water

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“…The impact disdrometer operated at the Lamont site since February 2006 is a Joss-Waldvogel type [26,[58][59][60] manufactured by Distromet Ltd. Impact disdrometers inherently assume that the hydrometeors are falling at v t , so that their terminal fall velocities are used to derive the number concentrations by diameter. This type of disdrometer has been reported to measure droplets with D = 0.3 to 5.5 mm with a ±5% accuracy [26].…”

Section: Disdrometer Measurementsmentioning

confidence: 99%

From Hydrometeor Size Distribution Measurements to Projections of Wind Turbine Blade Leading-Edge Erosion

Letson

Pryor

2023

Energies

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Wind turbine blade leading-edge erosion (LEE) is a cause of increased operation and maintenance costs and decreased annual energy production. Thus, detailed, site-specific quantification of likely erosion conditions are critically needed to inform wind plant owner/operator decisions regarding mitigation strategies. Estimating the damage potential at a wind plant site requires accurate measurement of precipitation intensity, phase, droplet size distributions, wind speeds and their joint statistics. The current work quantifies the effect of disdrometer type on the characterization of LEE potential at a site in the US Southern Great Plains. using observations from three co-located disdrometers (an optical, an impact and a video disdrometer), along with hub-height wind-speed observations from a Doppler lidar and two LEE models: a kinetic energy model and the Springer model. Estimates of total kinetic energy of hydrometeor impacts over the four-year study period vary by as much as 38%, and coating lifetime derived from accumulated distance-to-failure estimates from the Springer model differ by an even greater amount, depending on disdrometer type. Damage potential at this site is concentrated in time, with 50% of impact kinetic energy occurring in 6–12 h per year, depending on which set of disdrometer observations is used. Rotor-speed curtailment during the most erosive 0.1–0.2% of 10 min periods is found to increase blade lifetimes and lead to the lowest levelized cost of energy.

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“…Therefore, the Z-R relationship is a static relationship but varies in time and space. The most common approaches are to calibrate the Z-R relationship for use on a specific weather radar based on measurements of a distrometer [7][8][9], an equipment for measuring the drop size distribution, or the correlation of the QPE with rain gauge measurements [3,[10][11][12]. Nevertheless, the parameters of the Z-R relationship should be evaluated for use with only specific storm characteristics, being for instance either convective or stratiform.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Rain Gauge and Radar Precipitation Estimates towards Rainfall-Runoff Modelling in a Peri-Urban Basin in Attica, Greece

Bournas

Baltas

2021

Hydrology

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In this research work, an analysis is conducted concerning the impact on rainfall-runoff simulations of utilizing rain gauge precipitation measurements against weather radar quantitative precipitation estimates. The study area is the Sarantapotamos river basin, a peri-urban basin located in the greater area of Athens, and measurements from a newly installed X-Band weather radar system, referred to as rainscanner, along with ground rain gauge stations were used. Rainscanner, in contrast to rain gauges, is able to provide with higher resolution surface precipitation datasets, but due to signal errors, uncertainty is involved, and thus proper calibration and evaluation of these estimates must be first performed. In this context, this research work evaluates the impact of adopting different precipitation datasets and interpolation methods for generating runoff, through the use of a lumped based rainfall-runoff model. Initially, the analysis focuses on the correlation between the rain gauge and the rainscanner estimations for each station, as well as for the calculated mean areal precipitation. The results of the rainfall-runoff simulations show that even though a different spatial and temporal variability of the rainfall field is calculated through the two datasets, in a lumped-based scheme, the most important factor that dictates the runoff generation is the amount of total precipitation.

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Analysis of Joss-Waldvogel disdrometer measurements in rainfall events

Cited by 6 publications

References 12 publications

Recording Rainfall Intensity: Has an Optimum Method Been Found?

Recording Rainfall Intensity: Has an Optimum Method Been Found?

From Hydrometeor Size Distribution Measurements to Projections of Wind Turbine Blade Leading-Edge Erosion

Comparative Analysis of Rain Gauge and Radar Precipitation Estimates towards Rainfall-Runoff Modelling in a Peri-Urban Basin in Attica, Greece

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