当前位置: X-MOL 学术J. South Am. Earth Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Analysis of groundwater and river stage fluctuations and their relationship with water use and climate variation effects on Alto Grande watershed, Northeastern Brazil
Journal of South American Earth Sciences ( IF 1.8 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jsames.2020.102723
Eduardo A.G. Marques , Gerson C. Silva Junior , Glauco Z.S. Eger , Archange M. Ilambwetsi , Pousa Raphael , Tarcila N. Generoso , Josiane Oliveira , Jales N. Júnior

Abstract Sustainable use of water resources on the behavior of groundwater table and surface water level variations, especially in phreatic sedimentary aquifers, where a strong interaction between stream flow and groundwater normally takes place. In the present study, precipitation, water level fluctuation, river flow and pivot installation data from an important agricultural frontier with an increasing water use for irrigated agriculture and a downward precipitation trend were compared with surface and water level fluctuation monitoring data. The main purpose was to assess possible impacts on the aquifers and to analyze the variation in groundwater table and surface water levels due to long-term downward precipitation trend (climate variation effects) and increasing water demand (irrigation). A growing number of central pivots installed for irrigation are withdrawing water from the Urucuia Aquifer System (UAS) in western Bahia State, Northeastern Brazil, one of the leading agricultural frontiers of the world. Field surveys provided hydrogeological aspects that led to the construction of a hydrogeological conceptual model. Monitoring groundwater and surface water through Brazilian Geological Survey's Integrated Groundwater Monitoring Network (RIMAS-CPRM), satellite images and Hydrological Information System (HidroWeb-ANA) network formed the databases for the study. This data was compared with rainfall data and evolution of irrigated areas captured by satellite image analysis. Results indicate that reduction of rainfall volumes from 1990 to 2018 in the headwaters of Alto Grande basin, due to cyclic droughts, and an increase in surface and groundwater exploitation due to flourishing agribusiness activity has caused a considerable groundwater level drawdown. The drawdown of up to 6.63 m points to the need of strong management actions, which should provide a long-term sustainable use of water resources (superficial and underground) within Alto Grande watershed. This study is part of the actions undertaken to provide the scientific and technical basis to secure the availability of water and a sustainable agricultural activity, since an important part of the Cerrado, the Brazilian savanna ecosystem, and considerable proportion of Sao Francisco river flow, lies in the study area.

中文翻译:

巴西东北部奥拓格兰德流域地下水和河流水位波动及其与用水和气候变化影响的关系分析

摘要 水资源的可持续利用对地下水位和地表水位变化的影响,特别是在潜水沉积含水层中,河流和地下水之间通常会发生强烈的相互作用。在本研究中,将灌溉农业用水量增加且降水呈下降趋势的重要农业前沿的降水、水位波动、河流流量和枢轴安装数据与地表和水位波动监测数据进行了比较。主要目的是评估对含水层的可能影响,并分析由于长期降水减少趋势(气候变化效应)和需水量增加(灌溉)导致的地下水位和地表水位变化。越来越多的安装用于灌溉的中央枢纽正在从巴西东北部巴伊亚州西部的乌鲁库亚含水层系统 (UAS) 中取水,该含水层系统是世界领先的农业前沿之一。实地调查提供了导致构建水文地质概念模型的水文地质方面的信息。通过巴西地质调查局的综合地下水监测网络 (RIMAS-CPRM)、卫星图像和水文信息系统 (HidroWeb-ANA) 网络监测地下水和地表水构成了研究的数据库。将这些数据与卫星图像分析捕获的降雨数据和灌溉区域的演变进行了比较。结果表明,从 1990 年到 2018 年,由于周期性干旱,奥拓格兰德盆地源头的降雨量减少,由于农业综合企业活动的蓬勃发展,地表水和地下水开采量的增加导致地下水位大幅下降。高达 6.63 m 的水位下降表明需要采取强有力的管理行动,这应能长期可持续地利用 Alto Grande 流域内的水资源(地表和地下)。这项研究是为确保水资源供应和可持续农业活动提供科学和技术基础而采取的行动的一部分,因为塞拉多、巴西热带稀树草原生态系统的重要组成部分以及圣弗朗西斯科河流的相当大比例位于在研究区。63 m 表明需要强有力的管理行动,这应能长期可持续地利用 Alto Grande 流域内的水资源(地表和地下)。这项研究是为确保水资源供应和可持续农业活动提供科学和技术基础而采取的行动的一部分,因为塞拉多、巴西热带稀树草原生态系统的重要组成部分以及圣弗朗西斯科河流的相当大比例位于在研究区。63 m 表明需要强有力的管理行动,这应能长期可持续地利用 Alto Grande 流域内的水资源(地表和地下)。这项研究是为确保水资源供应和可持续农业活动提供科学和技术基础而采取的行动的一部分,因为塞拉多、巴西热带稀树草原生态系统的重要组成部分以及圣弗朗西斯科河流的相当大比例位于在研究区。
更新日期:2020-11-01
down
wechat
bug