Monitoring

Webinar: Real-time monitoring of groundwater flow and direction (TDI, iFLUX)

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Webinar: Real-time monitoring of groundwater flow and direction (TDI, iFLUX)

Case Study: Thermals springs in the Lower Orange River Valley

POSTER Since June 2010 and still ongoing today, the Lower Orange River Valley has experienced over a 1168 tremors(a) and earthquakes in the vicinity of Augrabies. Of these 1168 tremors, 71 quakes registered above 3 on the Richter scale and on 18 December 2011, the area was struck with an earthquake that registered 5 on the Richter scale. Four thermal springs are also located near this earthquake zone and the temperature of the water have a range of between 38?C -46.6?C, according to Kent LE. (1949/1969).

Conceptual Model Based Numerical Groundwater Flow Modelling of the Simbithi Eco-Estate, Kwazulu-Natal, South Africa

Water stress is frequently experienced in many parts of South Africa. To ensure the longevity of the country’s water resources, particularly groundwater, accurate quantification of the resource and prediction of the responses of each water resource unit to natural and anthropogenic stresses are necessary. To this endeavour, Simbithi Eco-Estate, located at Shaka’s Rock, KwaZulu-Natal requires the implementation of a Water Management Plan that includes a hydrogeological investigation.

Investigating The Potential Impacts Of Bentonite Mining At Matsopa Mine On The Groundwater System

This paper describes the results of geohydrological studies conducted at Matsopa Mine, where a shallow bentonite body is mined, to investigate the potential impacts of mining on the groundwater environment. An understanding of such potential impacts is crucial since the communitiesin the area are dependent solely on groundwater for their domestic water supply.

Dewatering Impacts of a South African Underground Coal Mine

The University of the Free State investigated the possible dewatering of boreholes situated on the farm properties in the vicinity of an underground coal mine. The investigation consisted of three phases.
Phase one was a hydrocensus on the farm properties.
Phase two consisted of borehole yield determination by conducting pumping tests on the boreholes (where possible) identified in the hydrocensus phase.

Rigorous Methodology For Sustainable Yield Estimation Using Groundwater Numerical Modelling Validation To Detailed Long Term Pumping Test Data

Groundwater numerical models are commonly used to determine the impact that groundwater abstraction has on the ability of surrounding areas to supply water, and thus to inform Water Use Licence (WUL) Applications. However, data available is often limited to that generated by relatively short-term geohydrological studies and pumping tests. In most cases this data and the degree of defined uncertainty in the model results are sufficient.

Depth Discrete Multilevel Monitoring In Fractured Rock: State Of The Technology And Implications

Well-established engineered systems for depth-discrete monitoring in fractured rock boreholes (referred to as a Multilevel System or MLS) are commercially available and offer much diversity in design options, however, they are used infrequently in professional practice and have seen minimal use in groundwater research. MLSs provide information about hydraulic head and hydrochemistry from many different depths in a single borehole and, therefore, magnify greatly the knowledge value of each borehole.

Practical Solutions for Academic Based Applications – Understanding the importance of correct aquifer test data interpretations

It has become increasingly apparent that understanding fractured rock mechanics as well as the interactions and exchanges between groundwater and surface water systems are crucial considering the increase in demand of each in recent years. Especially in a time where long term sustainability is of great importance for many water management agencies, groundwater professionals and the average water users.

Stable Isotope Techniques for the Evaluation of Water Sources for Domestic Supply in Stellenbosch, South Africa

During 2017-2018, the City of Cape Town, South Africa faced an unprecedented drought crisis with the six main water storages supplying Cape Town falling to a combined capacity of just under 20%. With the threat of severe water shortages looming, various additional water sources were examined to supplement the municipal water supply network. These were focussed on groundwater, desalination and treated effluent.

The onset of iron biofouling in boreholes in and around Cape Town

Iron biofouling in boreholes drilled into the Table Mountain Group has been documented, with groundwater abstracted for the Klein Karoo Rural Water Supply Scheme and irrigation in the Koo Valley hampered by clogged boreholes, pumps and pipes. A similar phenomenon has been experienced at some boreholes drilled and operationalised by the Western Cape Government in response to the onset of the crippling drought in 2017.