scholarly journals A New Perspective to Explore the Hydraulic Connectivity of Karst Aquifer System in Jinan Spring Catchment, China

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1368 ◽  
Author(s):  
Zhengxian Zhang ◽  
Weiping Wang ◽  
Shisong Qu ◽  
Qiang Huang ◽  
Shuai Liu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Karst Aquifer ◽  
Groundwater Table ◽  
Karst Groundwater ◽  
Groundwater Exploitation ◽  
Aquifer System ◽  
Regional Hydrogeology ◽  
Karst Aquifer System ◽  
Spring Catchment

Investigating the hydraulic connectivity of a complex karst aquifer system is an important research topic for sustainable operation and optimization layout of karst groundwater exploitation and recharge. However, the identification of preferential sites of recharge and exploitation is usually subject to regional hydrogeology conditions and the mechanisms of recharge and exploitation. The conventional research methods of hydraulic connectivity often have some limitations. In this study, we developed an improved grey amplitude relation model to explore the hydraulic connectivity in Jinan spring catchment and presented a quantized evaluation index water table fluctuation relation degree (WTFRD) using karst groundwater table data in Western Jinan and Jinan spring groups from 2014 to 2017. Results showed that the total WTFRD was 0.854 between Western Jinan and Jinan spring groups when the external distraction for karst groundwater table was the smallest, which was in high relation degree grade. Meanwhile, the change rules of karst groundwater table in the two sites were basically the same. Accordingly, a high connectivity occurred between the two karst aquifers from a statistical perspective, and further illustrated that Western Jinan could be selected as preferential experiment sites. A comprehensive case in Jinan spring catchment indicated that the WTFRD provided a preliminary idea to investigate hydraulic connectivity quantitatively. This method could be considered as a pre-study of the conventional experiments to form a high-efficiency and low-cost combined method, which has great potential and merits further study.

scholarly journals Simulation of Regional Karst Aquifer System and Assessment of Groundwater Resources in Manatí-Vega Baja, Puerto Rico

2015 ◽  
Vol 07 (12) ◽  
pp. 909-922 ◽  
Author(s):  
Balati Maihemuti ◽  
Reza Ghasemizadeh ◽  
Xue Yu ◽  
Ingrid Padilla ◽  
Akram N. Alshawabkeh
Keyword(s):  
Puerto Rico ◽  
Groundwater Resources ◽  
Karst Aquifer ◽  
Aquifer System ◽  
Karst Aquifer System ◽  
Vega Baja

scholarly journals The Effectiveness of Wenner-Schlumberger and Dipole-dipole Array of 2D Geoelectrical Survey to Detect The Occurring of Groundwater in the Gunung Kidul Karst Aquifer System, Yogyakarta, Indonesia

2016 ◽  
Vol 1 (2) ◽  
pp. 71 ◽  
Author(s):  
Oktanius Richard Hermawan ◽  
Doni Prakasa Eka Putra
Keyword(s):  
Karst Aquifer ◽  
Groundwater Exploration ◽  
Karst Area ◽  
Karst Terrain ◽  
Aquifer System ◽  
Crystalline Limestone ◽  
Karst Aquifer System ◽  
Dipole Configuration ◽  
Underground River ◽  
Water Saturated

Until today, geoelectrical survey is the most effective method for groundwater exploration. 2D method or known as horizontal profiling is now the most appropriate method in the geoelectrical survey compare to vertical electrical sounding method. The 2D method of Wenner-Schlumberger and Dipole-dipole configuration proved to be very effective to locate conventional aquifer occurrence on volcanic terrain or sedimentary terrain. Karst aquifer system is an unconventional aquifer and acts very differ in contrast with the conventional sedimentary aquifer. Heterogeneity and discontinuity of limestones in karst terrain will reveal a wide variety of resistivities, hence it is difficult to interpret. This research has important objective to define the effectiveness of the Wenner-Schlumberger and Dipole-dipole configuration in the 2D geoelectrical survey to explore groundwater in the karst area. Field observation of geology and 2D geoelectrical survey were conducted in underground river of Kali Suci Area, Gunung Kidul. In Kali Suci where an endokarst cave was occured on the surface, line survey was placed in the top of the cave and across the geometry of the cave. Measured stratigraphy in the wall of the cave found four types of limestone which consist of packstone, wackestone, grainstone and crystalline limestone. The Wenner-Schlumberger and Dipole-dipole method can detect differentiation of limestone types and also the exposed underground river successfully. However, compared to Wenner-Schlumberger array, Dipole-dipole array reveals less vertical accuration.. Therefore, on this research, the best method to detect water saturated zone or gourndwater in the karst system is the Wenner-Schlumberger method.

scholarly journals Hydrogeological map of the Dinaric Karst Aquifer System

2017 ◽  
Author(s):  
Chloé Meyer
Keyword(s):  
Adriatic Sea ◽  
Karst Aquifer ◽  
High Quality ◽  
Dinaric Karst ◽  
Resources Management ◽  
Aquifer System ◽  
Ne Italy ◽  
Aquifer Systems ◽  
Hydrogeological Map ◽  
Karst Aquifer System

Groundwaters of the Dinaric Karst form some of the world's largest karst aquifer systems. The Dinaric region contains huge amounts of high quality groundwater. It is one of the major contributors of freshwater entering the Adriatic Sea. The Dinaric Karst Aquifer System extends from NE Italy through Slovenia, Croatia, Bosnia & Herzegovina, Montenegro to Albania. Karst formations connected with the Dinaric carbonate chain outcrop also in Serbia, FYR Macedonia, and possibly in NW Greece. In the framework of the DIKTAS GEF-project (2010-2014) executed by UNESCO-IHP, the four DIKTAS project countries (Albania, Bosnia and Herzegovina, Croatia and Montenegro) have agreed to create two mechanisms in order to facilitate enhanced consultation and exchange of information between the governmental entities that are involved in water resources management. Groundwater Karst Transboundary

scholarly journals Analysis of Hydrogeochemical Characteristics of Tunnel Groundwater Based on Multivariate Statistical Technology

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Chen Peng ◽  
Yuanming Liu ◽  
Huiyu Chen ◽  
Qiaowei Yuan ◽  
Qingzhi Chen ◽  
...  
Keyword(s):  
Saturation Index ◽  
Karst Aquifer ◽  
Principal Component ◽  
Geological Structure ◽  
Chemical Components ◽  
Multivariate Statistical ◽  
Tunnel Excavation ◽  
Aquifer System ◽  
Karst Aquifer System ◽  
Natural Water Bodies

Following tunnel excavation, which is influenced by hydraulic fracturing and geological structure, a series of hydrochemical reactions occur in the karst aquifer, which has a significant impact on groundwater hydrology and the earth process. Based on five sets of 38 samples collected in the Tongzi Tunnel in 2020 and 2021, the main geochemical processes and water quality conditions of the karst aquifer system during tunnel construction were revealed by multivariate statistical analysis and graphical methods. The results showed that water-rock action is the main mechanism controlling groundwater chemistry in the study area; HCO3-, Ca2+, and Mg2+ are associated with the widely distributed carbonate rocks in the study area. SO42- is derived from gypsum and sulfate rocks and special strata, which are another important source of Ca2+. Sodium-containing silicates and reverse cation exchange as the causal mechanisms of Na+ whereas F- is derived from fluorite. According to the mineral saturation index calculations, the dissolution and precipitation of minerals such as alum, gypsum, calcite, dolomite, and salt rock have an important influence on the main chemical components in water. The 38 samples were subjected to cluster analysis, and the results could be classified into seven categories. The representative clusters 1, 3, and 5 were selected for principal component analysis. Clusters 1 and 5 of groundwater represent weathering, dissolution, and ion exchange of carbonate and sulfate rocks and are closely related to the lithologic limestone, limestone intercalated with carbonaceous mudstone, carbonaceous mudstone, and coal-measure strata in the aquifer. Cluster 3 is dominated by upper surface river water and characterizes the geochemistry in natural water bodies dominated by the dissolution of carbonate, sulfate, and salt rocks. Finally, groundwater quality is mostly found in Class IV, with NO3- and F- being the main contaminants in the water.

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