Calibration of tipping bucket rain gauges in the Graz urban research area

Vasvári, Vilmos

doi:10.1016/j.atmosres.2004.12.012

Cited by 42 publications

(40 citation statements)

References 6 publications

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“…On the other hand, as suggested by Shedekar et al [39] and Vasvári [40], a dynamic calibration for the correction of the under-catch errors caused by the motion of the buckets during precipitation events, was unnecessary given the nature of the overall low rainfall rates in both study areas. It was not possible to apply correction algorithms to the database considering that only a fraction of the dataloggers of the rain gauges were programmed to record the time of tipping.…”

Section: Sensorsmentioning

confidence: 99%

Effect of the Resolution of Tipping-Bucket Rain Gauge and Calculation Method on Rainfall Intensities in an Andean Mountain Gradient

Muñoz

Célleri

Feyen

2016

Water

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Abstract:A laser-optical disdrometer served as reference to assess the absolute percent bias of calculated rainfall intensity using the data of different-resolution tipping-bucket rain gauges classically applied by climatologists and hydrologists in the Andean region. Additionally, the impact of the calculation method (tip counting versus cubic spline interpolation) was examined. The combined effect was assessed for different rainfall intensity classes (0-0.99, 1-1.99, 2-4.99, and 5-10 mm·h −1 ) and timescales (5, 10, 30, and 60 min). Additionally, the variation in percent absolute bias of the Davis rain gauge, the collector most widely used in the study region, was defined with respect to the Texas rain gauge along an elevation gradient between 3300 and 4000 m a.s.l. Results reveal that the value of the percent absolute bias is largest for small rainfall intensities (≤2 mm·h −1 ) and short timescales (≤10 min), and decreases when the cubic spline interpolation is used. No relation was found between the error, the elevation, and rainfall depth along the gradient. Based on the research findings, it is recommended to measure precipitation in the high Andean mountain region with a high-resolution sensor and to consider cubic spline for the computation of intensities.

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Section: Sensorsmentioning

confidence: 99%

Effect of the Resolution of Tipping-Bucket Rain Gauge and Calculation Method on Rainfall Intensities in an Andean Mountain Gradient

Muñoz

Célleri

Feyen

2016

Water

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“…Indeed, this was an intensive rainfall event (13.5 mm in 12 min) that could be miscalculated by the automatic tipping bucket rainfall gauge. This type of gauge usually underestimates the high rainfall by not considering the loss of water during the bucket rotation (Marsalek, 1981;Vasvári, 2005). Moreover, this stormy event may generate spatially high, variable rainfall distribution.…”

Section: Pedoelectrical Relationshipsmentioning

confidence: 99%

Three-dimensional monitoring of soil water content in a maize field using Electrical Resistivity Tomography

Beff

Günther

Vandoorne

et al. 2013

Hydrol. Earth Syst. Sci.

133

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Abstract.A good understanding of the soil water content (SWC) distribution at the field scale is essential to improve the management of water, soil and crops. Recent studies proved that Electrical Resistivity Tomography (ERT) opens interesting perspectives in the determination of the SWC distribution in 3 dimensions (3-D). This study was conducted (i) to check and validate how ERT is able to monitor SWC distribution in a maize field during the late growing season; and (ii) to investigate how maize plants and rainfall affect the dynamics of SWC distribution. Time Domain Reflectometry (TDR) measurements were used to validate ERT-inverted SWC values. Evolution of water mass balance was also calculated to check whether ERT was capable of giving a reliable estimate of soil water stock evolution. It is observed that ERT was able to give the same average SWC as TDR (R 2 = 0.98). In addition, ERT gives better estimates of the water stock than TDR thanks to its higher spatial resolution. The high resolution of ERT measurements also allows for the discrimination of SWC heterogeneities. The SWC distribution showed that alternation of maize rows and inter-rows was the main influencing factor of the SWC distribution. The drying patterns were linked to the root profiles, with drier zones under the maize rows. During short periods, with negligible rainfall, the SWC decrease took place mainly in the two upper soil horizons and in the inter-row area. In contrast, rainfall increased the SWC mostly under the maize rows and in the upper soil layer. Nevertheless, the total amount of rainfall during the growing season was not sufficient to modify the SWC patterns induced by the maize rows. During the experimental time, there was hardly any SWC redistribution from maize rows to inter-rows. Yet, lateral redistribution from inter-rows to maize rows induced by potential gradient generates SWC decrease in the inter-row area and in the deeper soil horizons.

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“…Manual data collection at the HMSs started in June 2006. Rainfall and snowfall were observed at the first two HMSs, listed and designated KTS in Table 2, using the Siphon rain gauge (Vasvári, 2005) and weighing method (Liu et al, 2002), respectively, on a daily basis (Table 1). The first 12 HMS, designated KTS and GKT in Table 2, were instrumented to measure on a daily basis at sunrise, 08:00 a.m., 02:00 p.m., sunset, and 08:00 p.m., soil temperature and evaporation at belowground depths of 10, 20, and 30 cm.…”

Section: Instrumentation and Data Collectionmentioning

confidence: 99%

Spatio-temporal variations in soil moisture and physicochemical properties of a typical semiarid sand-meadow-desert landscape as influenced by land use

Duan

Liu

Wang

et al. 2011

Hydrol. Earth Syst. Sci.

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Abstract.A good understanding of the interrelations between land cover alteration and changes in hydrologic conditions (e.g., soil moisture) as well as soil physicochemical properties (e.g., fine soil particles and nutrients) is crucial for maintaining the fragile hydrologic and environmental conditions of semiarid land, such as the Horqin Sandy Land in China, but is lacking in existing literature. The objectives of this study were to examine: (1) spatio-temporal variations of soil moisture and physicochemical properties in semiarid land; and (2) how those variations are influenced by land cover alteration. Using the data collected in a 9.71 km 2 well-instrumented area of the Horqin Sandy Land, this study examined by visual examination and statistical analyses the spatio-temporal variations of soil moisture and physicochemical properties. The results indicated that for the study area, the soil moisture and physicochemical properties were dependent on local topography, soil texture, vegetation density, and human activity. Long-term reclamation for agriculture was found to reduce soil moisture by over 23 % and significantly (p-value < 0.05) lower the contents of soil organic matter, fine soil particles, and nutrients.

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Calibration of tipping bucket rain gauges in the Graz urban research area

Cited by 42 publications

References 6 publications

Effect of the Resolution of Tipping-Bucket Rain Gauge and Calculation Method on Rainfall Intensities in an Andean Mountain Gradient

Effect of the Resolution of Tipping-Bucket Rain Gauge and Calculation Method on Rainfall Intensities in an Andean Mountain Gradient

Three-dimensional monitoring of soil water content in a maize field using Electrical Resistivity Tomography

Spatio-temporal variations in soil moisture and physicochemical properties of a typical semiarid sand-meadow-desert landscape as influenced by land use

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