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Antoine Picard, Florent Barbecot, Gérard Bardoux, Pierre Agrinier, Marina Gillon, José A. Corcho Alvarado, Vincent Schneider, Jean-François Hélie and Frédérick de Oliveira
Accurate discharge measurement is mandatory for any hydrological study. While the ?velocity? measurement method is adapted to laminar flows, the ?dilution? method is more appropriate for turbulent streams. As most low-gradient streams worldwide are neith...
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Luís P. N. Mendes, Ana M. C. Ricardo, Alexandre J. M. Bernardino and Rui M. L. Ferreira
We present novel velocimetry algorithms based on the hybridization of correlation-based Particle Image Velocimetry (PIV) and a combination of Lucas?Kanade and Liu?Shen optical flow (OpF) methods. An efficient Aparapi/OpenCL implementation of those method...
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Donghae Baek, Il Won Seo, Jun Song Kim, Sung Hyun Jung and Yuyoung Choi
The dispersion coefficients are crucial in understanding the spreading of pollutant clouds in river flows, particularly in the context of the depth-averaged two-dimensional (2D) advection?dispersion equation (ADE). Traditionally, the 2D stream-tube routi...
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Chun-Gu Lee, Seung-Hwa Yu and Joong-Yong Rhee
The use of unmanned aerial spray systems (UASS) has increased owing to their many advantages. However, studies related to a standardized method to evaluate the spray performance of UASS are lacking. Therefore, in the present study, a quantitative analyti...
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Neveen B. Abdel-Mageed, Ashraf Ghanem, Ibrahim G. Shaaban, Atiyeh Ardakanian, Mohamed M. M. Ibrahem and Mohamed Elgamal
Flow measurements in pipelines using slug tracer have proved highly accurate for turbulent flow. This study experimentally investigates the effectiveness of using a passive rotor on the accuracy of discharge measurements in sewer pipes based on a saline ...
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Yuwei Dai, Minzhang Hou, Haidong Wang and Wanli Tu
Source location identification methods are typically applied to steady-state conditions under pure indoor or outdoor environments, but under time-varying wind conditions and coupled indoor and outdoor environments, the applicability is not clear. In this...
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Jiyan Qiao, Xiaobing Lu and Xuhui Zhang
A separate-bottom Couette cell is used to carry out ring-shear tests on sand and hydrate, and the evolution of shear bands is recognized using the tracer method. Based on experimental verification, a numerical simulation method is applied to study the sh...
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Andrej Stroj, Maja Bri?ki, Jasmina Lukac Reberski and Tihomir Frangen
Tracer testing is the only method in karst hydrogeology that can definitively determine whether a particular site belongs to a watershed of a particular karst spring. Therefore, it is an essential technique for delineating groundwater basins in karst are...
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Bo Zhou, Qiongying Liu, Shunyun Chen and Peixun Liu
Heat has been widely used as a groundwater tracer to determine groundwater flow direction and velocity in a way that is ubiquitous, low-cost, environmentally friendly, and easy to use. However, temperature observations are generally short-term and small-...
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Alberto Tazioli, Davide Fronzi and Elisa Mammoliti
Environmental isotopes are essential in hydrogeological studies, thanks to their contribution to the understanding of aquifers dynamics, vulnerability, water resources assessment, and management issues. The environmental isotopic approach plays a vital r...
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