A Study on the Groundwater Tracer Test in the Dragonmount Tailing Pond, Guangxi Province

2011 ◽  
Vol 243-249 ◽  
pp. 3325-3330
Author(s):  
Yuan Li ◽  
Jian Feng Qi ◽  
Lei Jia ◽  
Ying Zhang
Keyword(s):  
Dispersion Model ◽  
Water Source ◽  
Tracer Test ◽  
Concentration Curve ◽  
Hydrodynamic Dispersion ◽  
Hydrogeological Condition ◽  
Tailing Pond ◽  
Guangxi Province ◽  
Hydraulic Connection ◽  
Leakage Path

The dragonmount tailing pond which is taken as the study area has complex hydrogeological condition. It lies in Jingxi county, Guangxi province. In this paper, it gives out the time-concentration curve for the groundwater tracer test, makes use of single-dimensional hydrodynamic dispersion model to figures out the velocity of groundwater, coefficient of dispersion and dispersity. The mechanism of multimodal and double-humped phenomena was also investigated in the tracer test. In this paper, some situations such as leakage path, the trend of groundwater, hydraulic connection were analyzed. The research provides necessary hydrogeological basis for the design of the tailing pond and it’s of great significance to evaluate the pollution of its water source and conduct the construction.

scholarly journals Analysis of Cavities Characteristics in the Semar - Kiskendo Caves System, Jonggrangan Karst Area, Kulon Progo, Indonesia

2019 ◽  
Vol 125 ◽  
pp. 01016
Author(s):  
Romza Fauzan Agniy ◽  
Risma Sari Septianingrum ◽  
Ariel Seto Adinugraha ◽  
Qodri Alghozali ◽  
Bagas Aditya ◽  
...  
Keyword(s):  
Water Source ◽  
Average Diameter ◽  
Tracer Test ◽  
Karst Area ◽  
Survey Method ◽  
Cave System ◽  
Underground River

The Kiskendo Cave System is a system that has many benefits, including as a tourist site and water source. One of the systems in the upstream of Kiskendo Cave is the Semar-Kiskendo Caves system. This system is estimated to greatly affect the condition of the Kiskendo cave system because it is connected to the allogenic river which contributes to recharge from outside Jonggrangan Karst Area. The purpose of this research was 1) to find out the characteristics of the Semar Cave cavities and 2) to analyze the connectivity and characteristics of cavities in the Semar - Kiskendo Caves system. This research employed a survey method by mapping the cave to answer the first problem and conducting a tracer test of underground river stream to answer the second problem. The results showed that the Semar Cave cavity that could be mapped was 158.2 meters long, the total volume of the cave was 1,220.6 m3, and the average diameter of the cave cavity was 2.8 meters. The results of second study using the tracer test showed the connection between Semar Cave and the underground river in Kiskendo Cave, and the cavities had a characteristic of a single conduit which was sufficiently developed.

scholarly journals Alluvial Water Source Capacity under the Climate Change and Other Impacts—Case Study of the Pek River in Serbia

Proceedings ◽  
2018 ◽  
Vol 2 (11) ◽  
pp. 596
Author(s):  
Dejan Dimkić ◽  
Stevan Prohaska ◽  
Bojan Stanković ◽  
Predrag Pajić
Keyword(s):  
Climate Change ◽  
Land Use ◽  
River Discharge ◽  
Land Use Changes ◽  
Water Source ◽  
Water Sources ◽  
Hydraulic Connection ◽  
Two Factors ◽  
Human Use

River discharge changes, in addition to natural variability, depend on several factors. Three factors are the most important: climate change (CC), changes in human use of water (HU), and land use changes (LU). River discharge has hydraulic connection with its alluvial sources and both are sensitive to climate and other changes. Alluvial water sources (ALWSs) are often used for water supplying purposes. The question is what could we expect in the future? Are they more or less sensible on climate change and other two factors, compare to river discharge changes, or it differ from case to case?

scholarly journals Seasonal Variation of Drainage System in the Lower Ablation Area of a Monsoonal Temperate Debris-Covered Glacier in Mt. Gongga, South-Eastern Tibet

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1050 ◽  
Author(s):  
Qiao Liu ◽  
Shiyin Liu ◽  
Wulong Cao
Keyword(s):  
Seasonal Variation ◽  
Dispersion Model ◽  
Drainage System ◽  
Hydrodynamic Dispersion ◽  
Ablation Area ◽  
Advection Dispersion ◽  
Dye Tracer ◽  
Eastern Tibet ◽  
Glacier Ice ◽  
Subglacial Drainage

Seasonal evolution of the subglacial drainage system in the lower ablation area of the Hailuogou glacier ice tongue were revealed by repeated dye tracer (Rhodamine WT) experiments during the 2009 ablation season. Between April and October, 18 dye tracer experiments were conducted by injecting the tracer at one location of the lower ablation area of the Hailuogou Glacier to diagnose the seasonal variation of the subglacial drainage system of this section of glacier ice tongue. Using a simple advection-dispersion model (ADM), the flow velocity, hydrodynamic dispersion coefficient, and degree of tracer spreading were deduced. Tracer transit velocity through the tested subglacial channel varied from 0.148 to 0.555 m s−1 during the 2009 ablation season. Dispersivity showed a relatively high value than that found at other glaciers, which varied between 27.05 and 287.49 m2 s−1. Seasonal changes of these indexes indicated that the subglacial drainage system of the lower ablation area of the Hailougou Glacier is a relatively stable existing system in the case of its longitudinal shape, whereas its hydraulic efficiency is low in the early and late ablation seasons and high during the middle of summer due to subglacial channel expansion.

Hydrodynamics of a modified up-flow anaerobic sludge blanket reactor treating organic fraction of municipal solids waste

2020 ◽  
Vol 18 (7) ◽  
Author(s):  
José Vian ◽  
Sergio E. Vigueras-Carmona ◽  
Alejandra Velasco-Perez ◽  
Kelvyn B. Sánchez-Sánchez ◽  
Hector Puebla
Keyword(s):  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Flow Reactor ◽  
Dispersion Model ◽  
Buffer Zone ◽  
Tracer Test ◽  
Anaerobic Sludge ◽  
Organic Fraction ◽  
Anaerobic Sludge Blanket

AbstractThe hydrodynamic of modified up-flow anaerobic sludge blanket (UASB) treating organic fraction of municipal solids wastes (OFMSW) was investigated using tracer test experiments and residence time distribution (RTD) based models. The modified UASB digester employing the up-flow reactor concept was composed of the sludge bed, localized at the bottom of the reactor, a buffer zone above the sludge bed, a section with the OFMSW, and an upper section with a solid–liquid–gas separator. The solid-state section with the OFMSW allows the separation of hydrolytic and methanogenic phases, reducing the acidification of the reactor. The hydraulic flow transports the faster biodegradable fraction from the packing section to the sludge bed, favoring the methane productivity. Residence time distribution curves were analyzed by three tracer test models (axial dispersion model ADM, tanks in series model TIS and a multiple parameter model MPM). The MPM was successfully fitted to the experimental data.

Assessment of Lagrangian particle dispersion model “LAPMOD” through short range field tracer test in complex terrain

2019 ◽  
Vol 205-206 ◽  
pp. 34-41 ◽  
Author(s):  
Amin ul Haq ◽  
Qaisar Nadeem ◽  
Amjad Farooq ◽  
Naseem Irfan ◽  
Masroor Ahmad ◽  
...  
Keyword(s):  
Complex Terrain ◽  
Short Range ◽  
Dispersion Model ◽  
Tracer Test ◽  
Particle Dispersion ◽  
Lagrangian Particle

Simulations expérimentale et numérique de la dispersion hydrodynamique d'un effluent pollué en milieu côtier estuarien

1996 ◽  
Vol 23 (4) ◽  
pp. 820-837
Author(s):  
Nicolas K. Gidas ◽  
Vladimir G. Koutitonsky
Keyword(s):  
Physical Model ◽  
Coastal Waters ◽  
Numerical Study ◽  
Dispersion Model ◽  
Field Measurements ◽  
Hydrodynamic Dispersion ◽  
Advection Dispersion ◽  
Tracer Dispersion ◽  
Before And After ◽  
Estuarine Coastal

An experimental and numerical study was performed to measure and simulate the hydrodynamic dispersion of a pollutant effluent discharged by an outfall diffuser into an estuarine coastal zone near Rimouski, Canada. Field measurements of currents, tides, salinity, and winds were obtained in the vicinity of the injection site, and two tracer dispersion experiments were carried on in these coastal waters. The measurements were taken before and after the construction of the marine outfall diffuser. The similitude between the plume of a tracer (physical model) released into the coastal waters before construction and that of the real effluent (prototype) discharged at the same site was studied. A new coefficient of similitude was established, which allows to transpose the concentrations of the physical model tracer to the waste water concentrations of the prototype. The numerical simulation (2D) is performed with a hydrodynamic model and an advection–dispersion model of the MIKE21 system from the Danish Hydraulic Institute, using the so-called telescopic approach. The objective of these simulations was to predict, among other things, the pollutant effluent concentrations for critical hydrodynamic conditions relative to the aquatic ecosystem to be protected. The methodology elaborated was used for the management of the coastal environments subjected to pollution. Key words: simulation, hydrodynamics, advection–dispersion, numerical model, similitude, tide, effluent.

Modelling microbial transport in simulated low-grade heap bioleaching systems: The hydrodynamic dispersion model

2017 ◽  
Vol 172 ◽  
pp. 545-558 ◽  
Author(s):  
Elaine Govender-Opitz ◽  
Athanasios Kotsiopoulos ◽  
Christopher G. Bryan ◽  
Susan T.L. Harrison
Keyword(s):  
Dispersion Model ◽  
Hydrodynamic Dispersion ◽  
Low Grade ◽  
Microbial Transport ◽  
Heap Bioleaching

scholarly journals Analysis of the Karst Development Law Based on Multiple Exploration Technologies of Cambrian Limestone

2020 ◽  
Author(s):  
J.W. Guo ◽  
B. Zhang ◽  
X. Y. Wang
Keyword(s):  
Shallow Water ◽  
Coal Mine ◽  
Water Inrush ◽  
Tracer Test ◽  
Karst Water ◽  
The West ◽  
Hydraulic Connection ◽  
Karst Development ◽  
Detection Techniques ◽  
Closed Area

Abstract Coal mine floor limestone aquifers are a major source of water inrush from the coal seam floor and a serious threat to the safety of coal mining. In order to reduce and avoid the occurrence of water inrush within the coal mine, we use multiple detection techniques, which are geophysical exploration technology , drilling technology, water inrush accidents and tracer test, to develop a multi-faceted exploration of karst development and analyze its development characteristics in the Chaochuan mine No. 1 well of Pingdingshan Coal Co.Ltd, Henan Province, China. The results show that, the Cambrian limestone (CL) karst water is poor; there is a certain hydraulic connection. Near faults F5, F1, and SF28, the area is less water-rich area, the water is weak, and the deep karst water forms a closed area; 61.54 % of shallow water inrush accidents in the Taiyuan limestone and CL karsts were caused by large tectonic and nearby shallow faults. The karst vertical zonation is shallow; the shallow water level decreased more in the West Wing of the No. 1 well than in the East Wing at elevations above 140 m and below -150 m. The F125 level decline is greater than that of the east, and the west fault is more than 170 m due to the hydraulic connection intrusive barrier wings of the karst water. the East Wing below -150 m F125 fault was weak and uneven on both sides of the hydraulic connection.

Model Validation and Decision Making: An Example Using the Twin Lakes Tracer Test

1992 ◽  
Vol 294 ◽  
Author(s):  
Natalie E. Olague ◽  
Paul A. Davis ◽  
Darrla Smith ◽  
Tom Feeney
Keyword(s):  
Dispersion Model ◽  
Three Dimensional ◽  
Tracer Test ◽  
Two Dimensional ◽  
Transport Models ◽  
One Dimensional ◽  
Dimensional Flow ◽  
Advection Dispersion ◽  
Two Dimensional Flow ◽  
Similar Site

ABSTRACTAn approach to the validation of ground-water flow and transport models that are used in support of licensing a radioactive waste site is proposed and demonstrated. The approach attempts to interpret modeling results in light of their intended purpose. Instead of trying to find the ‘best’ fit model to the experimental data, we attempt to determine the conservativeness or bias invoked by applying different models to simulate the same experiment. In this way we are able to provide guidance to the regulatory community on where they should expect model results to fall relative to actual data and provide some evidence that certain model approaches lead to conservative results while other modeling approaches lead to non-conservative results. Applying this approach to the Twin Lakes Tracer Test demonstrated that a simple one-dimensional flow and one-dimensional dispersion model consistently over-predicts the maximum concentration. A one-dimensional flow with three-dimensional dispersion and two dimensional flow with two dimensional advection-dispersion are conservative only if they employ laboratory scale dispersivities. Therefore, if a decision-maker were to accept a similar site based on results from these types of models, there would be a relatively low chance that he has accepted an unsafe site. However, if decision-makers were to reject a similar site based on these types of results, there would be a relatively large chance that they rejected a safe site.

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