Optimization design and assessment of the effect of seepage control at reservoir sites under karst conditions: a case study in Anhui Province, China

Zhang, Wenbing; Shen, Zhenzhong; Chen, Guanyun; Zhang, Wanlin; Xu, Liqun; Ren, Jie; Wang, Fei

doi:10.1007/s10040-021-02357-5

Cited by 12 publications

(5 citation statements)

References 46 publications

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“…We used FORTRAN to compile a program (Shen–HHU) to calculate the dam’s three-dimensional seepage field using the UECM. The Shen–HHU had been verified in previous studies [ 42 , 43 , 44 ].…”

Section: Methodssupporting

confidence: 55%

“…The IGA method is suitable only for the natural period model of the Hami concrete-face rockfill dam. There are many studies on improving GA [ 44 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 ]. The suitability of these improved methods for the inversion of a dam’s foundation hydraulic conductivity and their calculation efficiency need further study.…”

Section: Resultsmentioning

confidence: 99%

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A New Method for Inversion of Dam Foundation Hydraulic Conductivity Using an Improved Genetic Algorithm Coupled with an Unsaturated Equivalent Continuum Model and Its Application

Peng

Shen

et al. 2023

Materials

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Seepage is a main cause of dam failure, and its stability analysis is the focus of a dam’s design, construction, and management. Because a geological survey can only determine the range of a dam foundation’s hydraulic conductivity, hydraulic conductivity inversion is crucial in engineering. However, current inversion methods of dam hydraulic conductivity are either not accurate enough or too complex to be directly used in engineering. Therefore, this paper proposes a new method for the inversion of hydraulic conductivity with high application value in hydraulic engineering using an improved genetic algorithm coupled with an unsaturated equivalent continuum model (IGA–UECM). This method is implemented by a new code that fully considers engineering applicability. In addition to overcoming the premature convergence shortcomings of traditional genetic algorithms, it converges faster than Bayesian optimization and tree-structured Parzen estimator inversion algorithms. This method is verified by comparing the water head from drilling exploration and inversion. The results of the inversion are used to study the influence of a cement grouting curtain layout scheme on the seepage field of the Hami concrete-face rockfill dam in China, which is used as an engineering application case of the IGA–UECM. The law of the seepage field is reasonable, which verifies the validity of the IGA–UECM. The new inversion method of hydraulic conductivity and the proposed cement grouting curtain layout in this study offer possible strategies for the design, construction, and management of concrete-face rockfill dams.

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Section: Methodssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 99%

A New Method for Inversion of Dam Foundation Hydraulic Conductivity Using an Improved Genetic Algorithm Coupled with an Unsaturated Equivalent Continuum Model and Its Application

Peng

Shen

et al. 2023

Materials

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“…The groundwater level difference between ZKS18 and ZKS50 is about 30.07 m, so the hydraulic gradient is 0.067 and the permeability coefficient is 4.386 m/min. The size of the leakage passage can be calculated as 0.333 mm based on Equation (4).…”

Section: Determination Of the Relationship Between Groundwater Rechar...mentioning

confidence: 99%

“…Comprehensive investigation of the complex hydrogeological conditions for the reservoir, determination of groundwater hydraulic connections, and identification of potential leakage passages are essential. These efforts provide a solid foundation for the hydrogeological surveys in water conservancy Water 2024, 16, 1100 2 of 14 and hydropower projects, and inform the design of effective seepage prevention measures for the reservoir [4].…”

Section: Introductionmentioning

confidence: 99%

Application of the Tracer Test in a Hydrogeological Survey for a Pumped Storage Power Station

Chen,

Zhang,

Chen

et al. 2024

Water

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In areas with complex hydrogeological conditions, the tracer test method is often used as an effective means in hydrogeological surveys. According to the results of tracer tests, hydrogeological parameters, including hydraulic gradient and permeability coefficient, fracture network leakage passages and their scale, and groundwater flow rate and direction can be quantitatively determined. This paper takes the upper reservoir of Yongxin Pumped Storage Power Station in Jiangxi Province as the research object, and focuses on the complex hydrogeological conditions of the upper reservoir. Three sets of tracer tests and multiple sets of single-hole flow rate and direction tests were conducted on the left and right banks of the reservoir and near surface gullies. The results showed that ZKS18 received tracers in all three tests, which indicates a close hydraulic connection between ZKS18 and the left bank, right bank, and surface gullies within the reservoir. Based on the single or multiple peak values of the tracer, it was determined that there are 1–6 leakage passages in the fractured rocks, with leakage passage sizes of 0.1–0.4 mm. According to the single-hole flow rate and flow direction tests, a self-developed instrument was used to determine the groundwater flow rate and flow direction at different depths in the test holes, which yielded results that were basically consistent with the results of the three-hole method. These results provide a basis for the use of tracer tests in hydrogeological surveys for water conservancy and hydropower engineering, and anti-seepage design of upper reservoirs.

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“…Fang et al [30] conducted a comprehensive study on the causes of dam leakage and the anti-seepage effect of the anti-seepage curtain using water pressure test, monitoring data, and comprehensive geophysical methods. Seepage effective analysis and seepage control at reservoir sites are fundamental parts of dam design and operations, and the permeability coefficient is the most basic parameter in the seepage analysis of rock mass [31]. In the field test of the karst dam site area, water pressure test is a very essential method to determine the permeability parameters of rock mass; the analysis and calculations were often carried out using the water pressure test [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Connectivity Analysis of Hidden Karst in Jurong Pumped Storage Power Station Area, China

Chen

Dong

Miao

et al. 2023

Water

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Based on the hidden karst exposed in Jurong Pumped Storage Power Station, combined with the field exploration data, the temporal and spatial development characteristics of hidden karst in the power station area are analyzed using the methods of specific solubility and specific corrosion, water chemical composition analysis, borehole television imaging, tracer test, and water pressure test. The results show that the karst development in the study area can be divided into three periods: pre-Cretaceous, Pleistocene, and modern karst. Karst development is controlled by soluble rock, non-soluble rock, and their combination, and the development direction is basically consistent with the fault strike. Karst caves are mainly distributed below the elevation of 100 m, with different shapes and scales and randomness. Non-soluble rocks and impure carbonate rocks are widely distributed in the study area, and surface karst is not developed. The underground karst caves are filled with red clay, and the rate of groundwater circulation is slow. The existence of geological bodies such as rock veins causes the groundwater levels to have obvious double-layer characteristics, which results in weak connectivity between karst caves. Although the karst in the power station area has a certain hydraulic connection with the surface water outside the area, the hydraulic connection of karst in the power station area is generally weak. The research results provide a scientific basis for the anti-seepage measures of underground powerhouses.

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Optimization design and assessment of the effect of seepage control at reservoir sites under karst conditions: a case study in Anhui Province, China

Cited by 12 publications

References 46 publications

A New Method for Inversion of Dam Foundation Hydraulic Conductivity Using an Improved Genetic Algorithm Coupled with an Unsaturated Equivalent Continuum Model and Its Application

A New Method for Inversion of Dam Foundation Hydraulic Conductivity Using an Improved Genetic Algorithm Coupled with an Unsaturated Equivalent Continuum Model and Its Application

Application of the Tracer Test in a Hydrogeological Survey for a Pumped Storage Power Station

Characteristics and Connectivity Analysis of Hidden Karst in Jurong Pumped Storage Power Station Area, China

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