Assessing the Effect of Damaged and Fractured Concrete Cutoff Wall on the Dynamics of Seawater Intrusion

Author(s):  
Ezzeddine Laabidi ◽  
Lamia Guellouz ◽  
Rachida Bouhlila
2019 ◽  
Vol 25 (1-2) ◽  
pp. 297-313 ◽  
Author(s):  
Tiansheng Miao ◽  
Wenxi Lu ◽  
Jin Lin ◽  
Jiayuan Guo ◽  
Yue Fan

2021 ◽  
Vol 11 (11) ◽  
Author(s):  
Han Zheng ◽  
Lu Wenxi ◽  
Fan Yue ◽  
Miao Tiansheng ◽  
Lin Jin ◽  
...  

AbstractIn this paper, the simulation–optimization method is used to study the optimal location of cutoff walls for seawater intrusion. The optimization model is based on minimizing the chlorine concentration of two water sources after 50 years. In order to reduce the computational complexity, a Kriging surrogate model simulation is coupled with the optimization model. Finally, a hypothetical case is used to evaluate the accuracy of the surrogate model and the performance of the optimization model. The results show that the outputs of the Kriging surrogate model and the variable density groundwater simulation model for the same cutoff wall design fit well, and the average relative error of the two outputs is only 2.2% which proves that it is feasible to apply the Kriging surrogate model to this problem. By solving the optimization model, the location of the cutoff wall which minimizes the sum of chlorine concentration of the two water sources after 50 years is obtained. This provides a stable and reliable method for the site selection of cutoff walls for future projects intended to prevent and control seawater intrusion.


Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1952
Author(s):  
Subrata Halder ◽  
Lingaraj Dhal ◽  
Madan K. Jha

Providing sustainable water supply for domestic needs and irrigated agriculture is one of the most significant challenges for the current century. This challenge is more daunting in coastal regions. Groundwater plays a pivotal role in addressing this challenge and hence, it is under growing stress in several parts of the world. To address this challenge, a proper understanding of groundwater characteristics in an area is essential. In this study, spatio-temporal analyses of pre-monsoon and post-monsoon groundwater-levels of two coastal aquifer systems (upper leaky confined and underlying confined) were carried out in Purba Medinipur District, West Bengal, India. Trend analysis of seasonal groundwater-levels of the two aquifers systems was also performed using Mann-Kendall test, Linear Regression test, and Innovative Trend test. Finally, the status of seawater intrusion in the two aquifers was evaluated using available groundwater-quality data of Chloride (Cl−) and Total Dissolve Solids (TDS). Considerable spatial and temporal variability was found in the seasonal groundwater-levels of the two aquifers. Further, decreasing trends were spotted in the pre-monsoon and post-monsoon groundwater-level time series of the leaky confined and confined aquifers, except pre-monsoon groundwater-levels in Contai-I and Deshpran blocks, and the post-monsoon groundwater-level in Ramnagar-I block for the leaky confined aquifer. The leaky confined aquifer in Contai-I, Contai-III, and Deshpran blocks and the confined aquifer in Nandigram-I and Nandigram-II blocks are vulnerable to seawater intrusion. There is an urgent need for the real-time monitoring of groundwater-levels and groundwater quality in both the aquifer systems, which can ensure efficient management of coastal groundwater reserves.


2021 ◽  
Vol 282 ◽  
pp. 111964
Author(s):  
Yun Yang ◽  
Jian Song ◽  
Craig T. Simmons ◽  
Behzad Ataie-Ashtiani ◽  
Jianfeng Wu ◽  
...  

2021 ◽  
Vol 232 (2) ◽  
Author(s):  
Wenbing Zhang ◽  
Wenbo Rao ◽  
Lei Li ◽  
Mark L. Brusseau ◽  
Ye Liu
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document