Streamflow Variability in Colombian Pacific Basins and Their Teleconnections with Climate Indices

被引：19

作者：

Canchala, Teresita ^{[1
]}

Ceron, Wilmar Loaiza ^{[2
,3
]}

Frances, Felix ^{[4
]}

Carvajal-Escobar, Yesid ^{[5
]}

Andreoli, Rita Valeria ^{[6
]}

Kayano, Mary Toshie ^{[7
]}

Alfonso-Morales, Wilfredo ^{[8
]}

Caicedo-Bravo, Eduardo ^{[8
]}

Ferreira de Souza, Rodrigo Augusto ^{[6
]}

机构：

[1] Univ Valle, Res Grp Water Resources Engn & Soil IREHISA, Sch Nat Resources & Environm Engn, Calle 13 100-00, Cali 25360, Colombia

[2] Univ Valle, Fac Humanities, Dept Geog, Calle 13 100-00, Cali 25360, Colombia

[3] Univ Estado Amazonas, Postgrad Program CLIAMB, INPA, Ave Andre Araujo,2936, BR-69060001 Manaus, Amazonas, Brazil

[4] Univ Politecn Valencia, Res Grp Hydrol & Environm Modelling GIMHA, Res Inst Water & Environm Engn IIAMA, Camino Vera,S-N, E-46022 Valencia, Spain

[5] Univ Valle, Engn Sch, Nat & Environm Resources Engn Sch EIDENAR, Calle 13 100-00, Cali 25360, Colombia

[6] Univ Estado Amazonas, Escola Super Tecnol, Ave Darcy Vargas,1200,Parque 10 Novembro, BR-69050020 Manaus, Amazonas, Brazil

[7] Inst Nacl Pesquisas Espaciais, Ctr Previsao Tempo & Estudos Climat, Div Modelagem & Desenvolvimento, Ave Astronautas,1758, BR-12227010 Sao Jose Dos Campos, SP, Brazil

[8] Univ Valle, Res Grp Percept & Intelligent Syst PSI, Sch Elect & Elect Engn, Calle 13 100-00, Cali 25360, Colombia

来源：

WATER | 2020年 / 12卷 / 02期

关键词：

Colombian Pacific; principal component analysis; streamflow variability; climate indices; wavelet analysis; SEA-SURFACE TEMPERATURES; SOUTH-AMERICA; SEASONAL PRECIPITATION; SPATIOTEMPORAL VARIABILITY; TROPICAL AMERICA; WAVELET ANALYSIS; MISSING DATA; EL-NINO; RIVER; ENSO;

D O I：

10.3390/w12020526

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Oceanic-atmospheric phenomena of different time scales concurrently might affect the streamflow in several basins around the world. The Atrato River Basin (ARB) and Pa-Ha River Basin (PRB) of the Colombian Pacific region are examples of such basins. Nevertheless, the relations between the streamflows in the ARB and PRB and the oceanic-atmospheric factors have not been examined considering different temporal scales. Hence, this article studies the relations of the climate indices and the variability of the streamflows in the ARB and PRB at interannual and decadal timescales. To this, the streamflow variability modes were obtained from the principal component analysis (PCA); furthermore, their linear dependence with indices of the El Nino/Southern Oscillation (ENSO), precipitation (PRP), the Choco low-level jet (CJ), and other indices were quantified through (a) Pearson and Kendall's tau correlations, and (b) wavelet transform. The PCA presented a single significant mode for each basin, with an explained variance of around 80%. The correlation analyses between the PC1s of the ARB and PRB, and the climate indices showed significant positive (negative) high correlations with PRP, CJ, and Southern Oscillation Index (SOI) (ENSO indices). The wavelet coherence analysis showed significant coherencies between ENSO and ARB: at interannual (2-7 years) and decadal scale (8-14), preferably with the sea surface temperature (SST) in the east and west Tropical Pacific Ocean (TPO). For PRB with the SST in the central and western regions of the TPO in the interannual (4-8 years) and decadal (8-14 years) scales, the decreases (increases) in streamflow precede the El Nino (La Nina) events. These results indicate multiscale relations between the basins' streamflow and climate phenomena not documented in previous works, relevant to forecast the extreme flow events in the Colombian Pacific rivers and for planning and implementing strategies for the sustainable use of water resources in the basins studied.

引用

页数：23

共 101 条

[61]

Montealegre E., 2000, Meteorologia Colombiana, V2, P7

[62] Flood hazard assessment of Atrato River in Colombia [J].