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Weather Radar Data and Distributed Hydrological modelling: An Application for mexico Valley

Open Journal of modern Hydrology 2013年第2期3卷 79-88页

作者： baldemar méndez-antonio Ernesto Caetano Gabriel Soto-Cortés Fabián G. Rivera-Trejo Ricardo A. Carvajal Rodríguez Christopher Watts metropolitan Auto- nomous University Mexico City Mexico National Autonomous University of mexico Mexico City Mexico Sonora University Hermosillo Mexico Tabasco Autonomous Juárez University Villahermosa Mexico.

The frequent occurrence of exceptionally very heavy rainfall in mexico during the summer causes flash floods in many areas and major economic losses. As a consequence, a significant part of the annual government budget is diverted to the reconstruction of the disasters caused by floods every year, resulting hold up in the country development. A key element to mitigate the flash flood hazards is the implementation of an early warning system with the ability to process the necessary information in the shortest possible time, in order to?increase structural and non-structural resilience in flood prone regions. The real-time estimation of rainfall is essential for the implementation of such systems and the use of remote sensing instruments that feed the operational rainfall-runoff hydrological models is becoming of increasing importance worldwide. However, in some countries such as mexico, the application of such technology for operational purposes is still in its infancy. Here the implementation of an operational hydrological model is described for the mixcoac river basin as part of the non-structural measures that can be applied for intense precipitation events. The main goal is to examine the feasibility of the use of remote sensing instruments and establish a methodology to predict the runoff in real time in urban river basins with complex topography, to increase the resilience of the areas affected by annual floods. The study takes data from weather radar operated by the National meteorological Service of mexico, as input to a distributed hydrological model. The distributed unit hydrograph model methodology is used in order to assess its feasibility in urban experimental basin. The basic concepts underlying the model, as well as calibration and validation are discussed. The results demonstrate the feasibility of using weather radar data for modeling rainfall-runoff process with distributed parameter models for urban watersheds. A product resulting from this study w

关键词： Radar Distributed Hydrologic modeling Resilience

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Laser Wavelength Estimation method Based on a High-Birefringence Fiber Loop mirror

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Photonic Sensors 2019年第1期9卷 89-96页

作者： Ricardo I.ALVAREZ-TAmAYO Patricia PRIETO-CORTES manuel DURAN-SANCHEZ baldemar IBARRA-ESCAmILLA antonio BARCELATA-PINZON Evgeny A.KUZIN Faculty of Physical-mathematical Sciences CONACYT-Universidad Autonoma de Nuevo LeonSan Nicolas de los Garza 66451Mexico Faculty of Physical-mathematical Sciences Universidad Autonoma de Nuevo LednSan Nicolas de los Garza 66451 Mexico Optics department CONA CYT-Instituto Nacional de AstrofisieaOptica y EleetronieaTonantzintla 72480Mexico Optics department Instituto Nacional de AstrofisicaOptica y ElectronicaTonantzintla 72480Mexico mechatronics division Universidad Tecnologica de PueblaPuebla 72300Mexico

A simple method for the estimation of the wavelength of a fiber laser system is proposed. The method is based on the use of a high-birefringence-fiber loop mirror(HBFLm).The HBFLm exhibits a periodic transmission/reflection spectrum whose spectral characteristics are determined by the length and temperature of the high-birefringence fiber(HBF).Then,by the previous characterization of the HBFLm spectral transmission response,the central wavelength of the generated laser line can be *** using a photodetector,the *** of the laser line is estimated during an HBF temperature scanning by measuring the temperature at which the maximum transmitted power of the HBFLm is *** proposed method is demonstrated in a linear cavity tunable Er/Yb fiber *** method is a reliable and low-cost alternative for laser wavelength determination in short wavelength ranges without the use of specialized and expensive equipment.

关键词： Wavelength meter fiber lasers fiber optical loop mirror high-birefringence fiber

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