ASSESSMENT OF HYDROLOGICAL MASS LOSSES IN THE NORTHEAST ATLANTIC EASTERN HYDROGRAPHIC REGION, BRAZIL

IF 0.5 Q3 Earth and Planetary Sciences

Boletim De Ciencias Geodesicas Pub Date : 2020-11-17 DOI:10.1590/s1982-21702020000300013

F. Lima, R. M. Gonçalves, Henry D. Montecino Castro, Raquel Arcoverde Vila Nova

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引用次数: 1

Abstract

Freshwater monitoring globally is fundamental to support decision-making. However, long-term hydrological data for some regions are lacking due to limited of observational networks. Remote sensing products come to aggregate the in situ observations and overcome obstacles about data availability. This study assesses the hydrological mass losses in the Northeast Atlantic Eastern Hydrographic Region (NAEHR) in Brazil through temporal data sources. GRACE RL06 Mascon solutions, reservoirs volume, vegetation index and rainfall stations are used. The results confirm the cohesion between the TWS variations with water volume and NDVI, obtaining a strong correlation of 0.78 and 0.77 respectively. The Standardized Precipitation Index scales (12, 24 and 36 months) showed a moderate and strong correlation with the TWS of 0.57, 0.73 and 0.72 respectively and identified the last regional severe drought from 2012 to 2017. The NEAHR is located almost entirely in the Brazilian semiarid region, comprises about 24 million inhabitants, it is high vulnerable to drought, thus justifying the importance of monitoring its water resources availability.

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巴西东北大西洋东部水文区水文质量损失评估

全球淡水监测是支持决策的基础。然而，由于观测网络的限制，一些地区缺乏长期水文资料。遥感产品汇集了现场观测数据，克服了数据可用性方面的障碍。本研究通过时间数据源评估了巴西东北大西洋东部水文区(NAEHR)的水文质量损失。使用GRACE RL06 Mascon溶液、水库容积、植被指数和雨量站。结果证实了TWS变化与水量和NDVI之间的内聚性，相关性分别为0.78和0.77。标准化降水指数尺度(12个月、24个月和36个月)与TWS的相关性分别为0.57、0.73和0.72，显示出2012 - 2017年的最后一次区域性严重干旱。NEAHR几乎全部位于巴西半干旱地区，约有2400万居民，极易受到干旱的影响，因此监测其水资源供应的重要性是合理的。

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来源期刊

Boletim De Ciencias Geodesicas Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

1.70

自引率

20.00%

发文量

审稿时长

3 months

期刊介绍： The Boletim de Ciências Geodésicas publishes original papers in the area of Geodetic Sciences and correlated ones (Geodesy, Photogrammetry and Remote Sensing, Cartography and Geographic Information Systems). Submitted articles must be unpublished, and should not be under consideration for publication in any other journal. Previous publication of the paper in conference proceedings would not violate the originality requirements. Articles must be written preferably in English language.