Water level alterations on the southern rim of the Guarani Aquifer due to the rain regime

IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Brazilian Journal of Geology Pub Date : 2021-05-14 DOI:10.1590/2317-4889202120200079
Vanessa da Conceição Osório, C. Moura
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引用次数: 1

Abstract

Abstract This paper estimated the total water storage variation in the southern rim of the Guarani Aquifer System during a three-year time span, making use of data provided by the Gravity Recovery and Climate Experiment. Monthly data were used to estimate the Bouguer anomaly in Southern Brazil. A direct modeling, using the Bouguer plateau, was applied to quantitatively estimate the water volume variation of a specific thickness in the studied region. Meteorological almanac data were compared to the gravitational alterations. We found a direct proportionality between the monthly rain average and the water table level. A simple model was found to forecast water accumulation as a function of rainfall regime, which is validated by a Pearson index of 0.82 that indicates a strong correlation between pluviometric and gravimetric data. In order to raise the stored water level near the recharge area by 1 mm, approximately 3 mm of rainfall is needed.
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由于降雨制度,瓜拉尼含水层南缘的水位变化
摘要利用重力恢复和气候试验数据,估算了瓜拉尼含水层系统南缘3年的总储水量变化。每月的数据被用来估计巴西南部的布格异常。利用布格高原直接建模,定量估算了研究区特定厚度的水量变化。气象年历资料与重力变化作了比较。我们发现月平均降雨量与地下水位成正比。我们发现了一个简单的模型,可以预测水的积累作为降雨制度的函数,皮尔逊指数为0.82,表明降水和重力数据之间存在很强的相关性。为了使补给区附近的蓄水量提高1毫米,大约需要3毫米的降雨量。
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来源期刊
Brazilian Journal of Geology
Brazilian Journal of Geology GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.20
自引率
7.10%
发文量
12
审稿时长
11 weeks
期刊介绍: The Brazilian Journal of Geology (BJG) is a quarterly journal published by the Brazilian Geological Society with an electronic open access version that provides an in-ternacional medium for the publication of original scientific work of broad interest concerned with all aspects of the earth sciences in Brazil, South America, and Antarctica, in-cluding oceanic regions adjacent to these regions. The BJG publishes papers with a regional appeal and more than local significance in the fields of mineralogy, petrology, geochemistry, paleontology, sedimentology, stratigraphy, structural geology, tectonics, neotectonics, geophysics applied to geology, volcanology, metallogeny and mineral deposits, marine geology, glaciology, paleoclimatology, geochronology, biostratigraphy, engineering geology, hydrogeology, geological hazards and remote sensing, providing a niche for interdisciplinary work on regional geology and Earth history. The BJG publishes articles (including review articles), rapid communications, articles with accelerated review processes, editorials, and discussions (brief, objective and concise comments on recent papers published in BJG with replies by authors). Manuscripts must be written in English. Companion papers will not be accepted.
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