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DOI10.1016/j.jag.2018.10.007
Basin scale rainfall-evapotranspiration dynamics in a tropical semiarid environment during dry and wet years
Mutti, Pedro R.1; da Silva, Lindenberg L.2; Medeiros, Salomao de S.3; Dubreuil, Vincent4; Mendes, Keila R.1; Marques, Thiago V.1; Lucio, Paulo S.1,5; Santos e Silva, Claudio M.1,5; Bezerra, Bergson G.1,5
发表日期2019
ISSN0303-2434
卷号75页码:29-43
英文摘要

In semiarid regions the occurrence of alternating long drought and heavy rainfall periods directly impacts water availability, affecting human water supply, agriculture development and the provision of ecosystem services. Because of that, research on the water input and output fluxes at the basin scale is of paramount importance. In this sense, rainfall-evapotranspiration (ET) dynamics play a critical role in water, soil and vegetation interactions, in hydrometeorological modelling and in the energy fluxes dynamics of semiarid regions. Therefore, the objective of this study was to quantify daily ET during a wet year and a dry year in a watershed located in the Brazilian Semiarid, by using remote sensing data and formulations based on the Simplified Surface Energy Balance Index (S-SEBI) and the Simplified Surface Energy Balance (SSEB) algorithms. Land surface temperature, albedo and NDVI data from MODIS sensor and solar radiation data from weather stations located in the basin were used. Rainfall analysis indicated 2009 and 2012 as being representatives of anomalously wet and dry years respectively, which were selected for the quantification of ET. The proposed algorithm was adjusted and verified with data from a flux tower equipped with eddy covariance system. Daily remote sensing ET estimates showed good agreement with observed values (RMSE = 0.79 mm.d(-1)) and the annual ET relative error was of 7.7% (35.4 mm.year(-1)). Results showed that the native vegetation can delay its dormant state for five months during wet years. During the wet year, ET differences between land cover classes were less noticeable due to soil saturation and the urgency of vegetated surfaces to meet their physiological needs. In dry year, however, differences were more evident, with bare soil presenting lower ET rates and vegetation classes showing higher ET values.


WOS研究方向Remote Sensing
来源期刊INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/94584
作者单位1.Fed Univ Rio Grande Norte UFRN, Climate Sci Program, Natal, RN, Brazil;
2.Execut Agcy Water Management Paraiba State, Campina Grande, Paraiba, Brazil;
3.Natl Inst Semiarid INSA, Campina Grande, Paraiba, Brazil;
4.Univ Rennes 2, CNRS, UMR 6554, COSTEL LETG, Rennes, Bretagne, France;
5.Fed Univ Rio Grande Norte UFRN, Dept Atmospher & Climate Sci, Natal, RN, Brazil
推荐引用方式
GB/T 7714
Mutti, Pedro R.,da Silva, Lindenberg L.,Medeiros, Salomao de S.,et al. Basin scale rainfall-evapotranspiration dynamics in a tropical semiarid environment during dry and wet years[J],2019,75:29-43.
APA Mutti, Pedro R..,da Silva, Lindenberg L..,Medeiros, Salomao de S..,Dubreuil, Vincent.,Mendes, Keila R..,...&Bezerra, Bergson G..(2019).Basin scale rainfall-evapotranspiration dynamics in a tropical semiarid environment during dry and wet years.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,75,29-43.
MLA Mutti, Pedro R.,et al."Basin scale rainfall-evapotranspiration dynamics in a tropical semiarid environment during dry and wet years".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 75(2019):29-43.
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