Variation of precipitation concentration from 1960 to 2014 in the Middle and Lower reaches of the Yangtze River Basin, China

L. Zhao; J. M. Wang; Z. Zhao; J. Fang

doi:10.18172/cig.2930

Autores/as

L. Zhao School of Resource and Environmental Sciences Wuhan University
J. M. Wang School of Resource and Environmental Sciences Wuhan University
Z. Zhao School of Resource and Environmental Sciences Wuhan University
J. Fang School of Resource and Environmental Sciences Wuhan University

DOI:

https://doi.org/10.18172/cig.2930

Palabras clave:

Concentración de la precipitación, variación espacio-temporal, ENSO, Cuenca del río Yangtze

Resumen

Basándose en la precipitación diaria de 127 estaciones desde 1960 hasta 2014, este estudio se ha centrado en la variación espacio-temporal del PCD (Grado de concentración de la precipitación) y el PCP (Periodo de concentración de la precipitación), y sus posibles relaciones con ENSO (Oscilación Meridional de El Niño) en los tramos medio e inferior del Río Yangtze de China. Los principales resultados indican en primer lugar que el PCD medio estuvo generalmente por debajo de 0,5 en todo el área de estudio, localizándose el valor más bajo en el nordeste y en el sur. Además, hubo una tendencia positiva de la precipitación concentrada en la parte occidental, mientras que fue negativa en la oriental. En segundo lugar, el PCP medio osciló de mayo a julio y se retrasó de sur a norte, junto con una tendencia a avanzar la estación lluviosa en la parte central. Por otro lado, el PCD tuvo una relación positive con ONI Índice Oceánico de EL Niño), siendo negativa con el PCP. El Niño hizo que la estación lluviosa ocurriera antes y que el periodo de precipitación fuera más concentrado. Este estudio pudo no sólo arrojar más luz a la comprensión de la variación de los patrones de precipitación, sino también proporcionar un apoyo teórico a la gobernanza de los riesgos de desastres regionales y la gestión de los recursos hídricos en la cuenca media e inferior del Río Yangtze.

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