Groundwater flow model of the Pipiripau watershed, Federal District of Brazil
Groundwater flow model of the Pipiripau watershed, Federal District of Brazil
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DOI：
10.1007/s12665-013-2400-5
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发表时间：
2013-04
影响因子：
2.8
通讯作者：
T. D. Gonçalves;T. Fischer;Agnes Gräbe;O. Kolditz;H. Weiss
中科院分区：
文献类型：
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作者：
T. D. Gonçalves;T. Fischer;Agnes Gräbe;O. Kolditz;H. Weiss
为了了解巴西联邦区地下水动态并改善水资源管理，本研究提出了一个3D地下水流模型来表示地下水位和流量系统。选定的测试地点是 Pipiripau 流域。该模型的开发基于现有的地质、水文地质、地貌、气候和土壤学数据。地质和水文地质数据用于生成 3D 地下水流模型。该域的 3D 网格元素是通过地下水建模系统软件根据井材料的记录生成的。有限元法的数值模拟是在科学软件OpenGeoSys的框架下实现的。利用 3D 网格分配的边界条件，纳入年平均渗透数据和水文地质参数。随后，利用 PEST 软件利用井水位的可用数据对稳态模型进行了校准。结果表明，模型域内稳态水头的分布情况，最高值出现在东部和西部补给区，最低值出现在盆地西南部。研究结果可作为瞬态地下水流模拟的初始条件，为水资源管理提供科学依据。
In order to understand the groundwater dynamics and to improve the management of water resources in the Federal District of Brazil, this research proposes a 3D groundwater flow model to represent the groundwater level and flow system. The selected test site was the Pipiripau catchment. The development of the model was based on available geological, hydrogeological, geomorphological, climatological and pedological data. Geological and hydrogeological data were used to generate the 3D groundwater flow model. The 3D mesh elements of the domain were generated through the Groundwater Modeling System software, based on the logs of the well materials. The numerical simulation of the finite element method was implemented in the framework of the scientific software OpenGeoSys. With the 3D mesh-appropriated boundary conditions, annual average infiltration data and hydrogeological parameters were incorporated. Afterwards, the steady-state model was calibrated by the PEST software using available data of the water level from wells. The results showed the distribution of the steady-state hydraulic heads in the model domain, where the highest values occurred in the east and west recharge areas and the lowest values were found in the southwest of the basin. The results of this study can be a used as initial condition for the transient groundwater flow simulation and to provide a scientific basis for water resource management.