Hydrogeological characterization of flow system in a karstic aquifer, Seymareh dam, Iran

Peely, Ahmad Behrouj; Mohammadi, Zargham; Raeisi, Ezzat; Solgi, Khashayar; Mosavi, Mohammad J.; Kamali, Majid

doi:10.1016/j.jafrearsci.2018.03.025

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…Transmissivity is generally over 1000 m 2 /day and locally up to 3500 m 2 /day, which is associated with fracture development [22]. The occurrence of more than 50 springs in the karstic aquifer in Iran was attributed to water that seeps from the Seymareh Dam, where average groundwater velocity ranges from 0.2 to more than 14 m/h [23]. This indicates that the karst structures act as an open system.…”

Section: Karst Structures and Groundwater Occurrencementioning

confidence: 99%

Groundwater Recharge and Circulation in Dolomitic Aquifer Located in Semi-Arid Region: Evidence from the δ18O and δ2H Record, South Africa

Abiye

2023

Geosciences

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Dolomitic aquifers are regarded as important groundwater storage sites in South Africa. Since these aquifers occur in a semi-arid climatic setting with low rainfall, often characterized by a torrential downpour and high potential evapotranspiration, the occurrence of active recharge is very limited (<5% of mean annual rainfall) as compared with the rainfall amount. The Malmani dolomites that have undergone greenschist metamorphism contain widespread caves and open karst structures at shallow levels, which facilitate groundwater recharge, circulation, storage and spring occurrence. However, the open karst structures receive recharge that passes through fractures in the vadose zone, which regulates the recharge through retardation and mixing processes. The integrated approach involving major ions and stable isotopes of water was applied to understand the recharge mechanism. The cave drip water samples were represented by the δ18O values of −3.95‰ to 3.32‰ and the δ2H values ranging from −11.0‰ to 27.7‰. On the other hand, the rainfall isotope results for δ18O fall between −16.11‰ and 5.38‰, while the δ2H values fall between −105.7‰ and 35.6‰. The most depleted Malapa springs contain δ18O of −5.64‰ and δ2H of −32.4‰. Based on the results, the mixing of water in the vadose zone could be considered as an indicator of the dominance of a slow-diffusive flow process in the aquifer as a result of poor fracture permeability. However, regional groundwater circulation through faults and dykes besides interconnected karst structures helps in generating highly productive karst springs in the region characterized by low rainfall.

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Section: Karst Structures and Groundwater Occurrencementioning

confidence: 99%

Groundwater Recharge and Circulation in Dolomitic Aquifer Located in Semi-Arid Region: Evidence from the δ18O and δ2H Record, South Africa

Abiye

2023

Geosciences

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“…Due to the strong heterogeneity of the aquifer medium, effectively identifying the hydrogeological characteristics of the karst aquifer system has become one of the difficulties in the current study (Guo et al, 2020; Milanovic, 2007; Peely et al, 2018; Ahmet et al, 2020). The physical process of groundwater flow in the karst aquifer is mainly determined by the characteristics of the complex conduit‐matrix system, and numerous techniques are available for identifying the features of the karst groundwater system, including hydrogeochemical analysis (Adji et al, 2017), tracer tests (Benischke, 2021), and spring hydrograph analyses (Chang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Rainfall events‐spring flow relationship and karst flow component analysis in a conduit‐matrix coupled system

Li,

Shu,

et al. 2023

Hydrological Processes

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Karst aquifers have complex structures and high heterogeneity, making it difficult to describe their hydrogeological characteristics. An essential tool for comprehending karst hydrogeology and identifying the hydraulic characteristics of the karst system is a quantitative analysis of the recession process of the karst spring hydrograph. The recession process of the spring hydrograph following a rainfall event can be utilized to assess the internal structure of the karst system as it relates to the karst aquifer's response to rainfall events. In this study, a laboratory physical experiment model is built based on typical karst hydrogeological circumstances, and a corresponding combined discrete‐continuum (CDC) numerical model is established, coupling conduit and matrix. The primary goal of this paper is to investigate how the recession process of the spring hydrograph responds to various rainfall events. Different rainfall intensities with the same rainfall duration and various rainfall intensities with the same rain amount are examples of rainfall patterns. The simulation results showed that the pattern of rainfall events affects the recession process of the spring hydrograph, and the recession coefficient of the corresponding recession stage, the proportion of water volume released by conduit and matrix with the different rainfall patterns are calculated and analysed, and the impact of rainfall events on the recession coefficient of spring hydrograph and the spring water composition has been explored. The research results can provide a reference and basis for the management of water resources in karst areas.

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Study on factors affecting the groundwater and springs quality downstream of Seymareh Dam—Iran

Cheshomi

Solgi

Milanovic³

et al. 2022

Bull Eng Geol Environ

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Hydrogeological characterization of flow system in a karstic aquifer, Seymareh dam, Iran

Cited by 9 publications

References 14 publications

Groundwater Recharge and Circulation in Dolomitic Aquifer Located in Semi-Arid Region: Evidence from the δ18O and δ2H Record, South Africa

Groundwater Recharge and Circulation in Dolomitic Aquifer Located in Semi-Arid Region: Evidence from the δ18O and δ2H Record, South Africa

Rainfall events‐spring flow relationship and karst flow component analysis in a conduit‐matrix coupled system

Study on factors affecting the groundwater and springs quality downstream of Seymareh Dam—Iran

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