Influence of anthropogenic effects and climate variability on streamflow in a Brazilian tropical watershed

被引:2
|
作者
Reis, Guilherme Barbosa [1 ]
da Silva, Demetrius David [1 ]
Moreira, Michel Castro [1 ]
Fernandes Filho, Elpidio Inacio [2 ]
Fraga, Micael de Souza [3 ]
Cecilio, Roberto Avelino [4 ]
Pinheiro, Savio Augusto Rocha [1 ]
Pinto, Gabriel Rodrigues Arruda [1 ]
机构
[1] Univ Fed Vicosa, Dept Agr Engn, Vicosa, MG, Brazil
[2] Univ Fed Vicosa, Dept Soil & Plant Nutr, Vicosa, MG, Brazil
[3] Water Management Inst Minas Gerais, Belo Horizonte, MG, Brazil
[4] Forest & Wood Sci Dept, Fed Univ Espirito Santo, Jeronimo Monteiro, ES, Brazil
关键词
MAHANADI RIVER-BASIN; GROUNDWATER RECHARGE; LAND-COVER; TRENDS; FLOW; IMPACTS; FOREST;
D O I
10.1007/s00704-024-04936-4
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Recently, there has been an increase in the number of natural disasters caused by extreme events, which are enhanced by climate change and anthropogenic interference. Therefore, understanding the hydrological behavior in areas with high vulnerability to floods and water scarcity is essential to capably manage water resources. In this context the study aimed to analyze the streamflow trend in the Piranga river basin, as well as to evaluate the determining factors in the streamflow variation regime in the watershed. For this reason, historical series of seven stream gauging stations were analyzed, adopting the base period of studies from 1975 to 2018. In order to identify the trend in maximum, average and minimum streamflow data, the Mann-Kendall, Pettitt and Spearman correlation tests were used. To understand the possible causes of streamflow trends, precipitation data, land use and occupation, and water demand were analyzed. It was observed that all stations showed some significant trend of streamflow reduction, especially in the dry season, having reduced from 10 to 35% comparing to the historical series average. On an annual scale, significant trends of reduction in average and minimum streamflow were detected. The change in streamflow behavior was not related to the distribution of precipitation over the years in the watershed. The cause of streamflow reduction may be related to the increase in water demand and with changes in land use and occupation, mainly characterized by the increase in planted forest, forest formation and urban areas and the reduction of areas destined to agriculture. The methodology proposed in this study can be adapted to other watersheds in the world, aiming to assist in the planning of water resources.
引用
收藏
页码:5203 / 5217
页数:15
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