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Volume 7
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Article

An Assessment of the Recent Evolution of the Streamflow in a Near-Natural System: A Case Study in the Headwaters of the Mero Basin (Galicia, Spain)

by
M. L. Rodríguez-Blanco
1,*,
M. M. Taboada-Castro
2 and
M. T. Taboada-Castro
3
1
History, Art and Geography Department, GEAAT Group, University of Vigo, Campus As Lagoas, 36310 Ourense, Spain
2
ETSIIAA, Area of Soil Science and Soil Chemistry, University of Valladolid, 34004 Palencia, Spain
3
Faculty of Sciences, Centre for Advanced Scientific Research (CICA), University of A Coruna, 15071 A Coruña, Spain
*
Author to whom correspondence should be addressed.
Hydrology 2020, 7(4), 97; https://doi.org/10.3390/hydrology7040097
Submission received: 30 September 2020 / Revised: 3 December 2020 / Accepted: 3 December 2020 / Published: 8 December 2020
(This article belongs to the Special Issue Advances in Flow Modeling for Water Resources and Hydrological Engineering)
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Abstract

Observational trend analysis is fundamental for documenting changes in river flows and placing extreme events in their longer-term historical context. Observations from near-natural catchments, i.e., with little or no alteration by humans, are of great importance in detecting and attributing streamflow trends. The purpose of this study is to analyze the annual and seasonal trends of stream discharge (mean, low and high flows) in a headwater catchment in NW Spain, i.e., in the wettest corner of the Iberian Peninsula. The results showed no significant decrease in the mean annual stream discharge. However, significantly lower summer and autumn mean stream discharge and an increase in low flow period were detected, in addition to lesser autumn high flow. The rainfall pattern followed an upward trend, but was not significant. This different pattern shown by rainfall and discharge indicates that is not sufficient to explain the observed trend in stream discharge. Air temperature, most notably by enhancing evapotranspiration, may explain the altered patterns of stream discharge.
Keywords: stream discharge; near-natural catchment; trend analysis; NW Spain stream discharge; near-natural catchment; trend analysis; NW Spain

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MDPI and ACS Style

Rodríguez-Blanco, M.L.; Taboada-Castro, M.M.; Taboada-Castro, M.T. An Assessment of the Recent Evolution of the Streamflow in a Near-Natural System: A Case Study in the Headwaters of the Mero Basin (Galicia, Spain). Hydrology 2020, 7, 97. https://doi.org/10.3390/hydrology7040097

AMA Style

Rodríguez-Blanco ML, Taboada-Castro MM, Taboada-Castro MT. An Assessment of the Recent Evolution of the Streamflow in a Near-Natural System: A Case Study in the Headwaters of the Mero Basin (Galicia, Spain). Hydrology. 2020; 7(4):97. https://doi.org/10.3390/hydrology7040097

Chicago/Turabian Style

Rodríguez-Blanco, M. L., M. M. Taboada-Castro, and M. T. Taboada-Castro. 2020. "An Assessment of the Recent Evolution of the Streamflow in a Near-Natural System: A Case Study in the Headwaters of the Mero Basin (Galicia, Spain)" Hydrology 7, no. 4: 97. https://doi.org/10.3390/hydrology7040097

APA Style

Rodríguez-Blanco, M. L., Taboada-Castro, M. M., & Taboada-Castro, M. T. (2020). An Assessment of the Recent Evolution of the Streamflow in a Near-Natural System: A Case Study in the Headwaters of the Mero Basin (Galicia, Spain). Hydrology, 7(4), 97. https://doi.org/10.3390/hydrology7040097

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