Inicio  /  Water  /  Vol: 16 Par: 6 (2024)  /  Artículo
ARTÍCULO
TITULO

Synoptic Analysis of Flood-Causing Rainfall and Flood Characteristics in the Source Area of the Yellow River

Lijun Jin    
Changsheng Yan    
Baojun Yuan    
Jing Liu and Jifeng Liu    

Resumen

The source area of the Yellow River (SAYR) in China is an important water yield and water-conservation area in the Yellow River. Understanding the variability in rainfall and flood over the SAYR region and the related mechanism of flood-causing rainfall is of great importance for the utilization of flood water resources through the optimal operation of cascade reservoirs over the upper Yellow River such as Longyangxia and Liujiaxia, and even for the prevention of flood and drought disasters for the entire Yellow River. Based on the flow data of Tangnaihai hydrological station, the rainfall data of the SAYR region and NCEP-NCAR reanalysis data from 1961 to 2020, three meteorological conceptual models of flood-causing rainfall?namely westerly trough type, low vortex shear type, and subtropical high southwest flow type?are established by using the weather-type method. The mechanism of flood-causing rainfall and the corresponding flood characteristics of each weather type were investigated. The results show that during the process of flood-causing rainfall, in the westerly trough type, the mid- and high-latitude circulation is flat and fluctuating. In the low vortex shear type, the high pressures over the Ural Mountains and the Okhotsk Sea are stronger compared to other types in the same period, and a low vortex shear line is formed in the west of the SAYR region at the low level. The rain is formed during the eastward movement of the shear line. In the subtropical high southwest flow type, the low trough of Lake Balkhash and the subtropical high are stronger compared to other types in the same period. Flood-causing rainfall generally occurs in areas with low-level convergence, high-level negative vorticity, low-level positive vorticity, convergence of water vapor flux, a certain amount of atmospheric precipitable water, and low-level cold advection. In terms of flood peak increment and the maximum accumulated flood volume, the westerly trough type has a long duration and small flood volume, and the low vortex shear type and the subtropical high southwest flow type have a short duration and large flood volume.

 Artículos similares

       
 
Angelika L. Alcantara and Kuk-Hyun Ahn    
Rainfall events are known to be driven by various synoptic disturbances or dominant processes in the atmosphere. In spite of the diverse atmospheric contributions, the assumption of homogeneity is commonly adopted when a hydrological frequency analysis i... ver más
Revista: Water

 
Miguel A. Cahuich-López,Ismael Mariño-Tapia,Alejandro José Souza,Gerardo Gold-Bouchot,Mark Cohen,David Valdés-Lozano     Pág. 123 - 142
The balance between synoptic and sea breeze atmospheric phenomena can profoundly influence atmospheric circulation in coastal regions. In this paper, a comprehensive study to understand the quasi-permanent patterns of such variability over the surface wi... ver más
Revista: Atmósfera

 
Linhui Wang, Huiwang Gao, Jie Shi and Lian Xie    
The contribution of high-frequency wind to the Peruvian upwelling system during 2014?2016 was studied using the Regional Ocean Modeling System (ROMS), forced by four different temporal resolution (six-hourly, daily, weekly, and monthly) wind forcing. A m... ver más

 
Phelype Haron Oleinik, Eduardo de Paula Kirinus, Cristiano Fragassa, Wiliam Correa Marques and Juliana Costi    
Global electric energy demand is constantly growing, consequently leading towards the usage of renewable energy sources reducing pollution and increasing sustainability. The ocean is a poorly explored renewable energy source; thus, to evaluate the Brazil... ver más

 
Ascario Pérez,Juan Carlos Ortiz,Luis F. Bejarano,Luis Otero D.,Juan C. Restrepo L.,Andrés Franco H.     Pág. 389 - 406
Circulation of sea breeze is a well-known and important mesoscale system, boosted by different properties of reception and storage of solar heat between land and sea during one day, and its effect on waves, currents, and transport of atmospheric contamin... ver más
Revista: Atmósfera