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Groundwater reserve determination for the middle Vaal water management area
Expanded Title:EXECUTIVE SUMMARY The Middle Vaal Water Management Area (MVWMencompassing ~52 500 km2 in the northcentral portion of the country, occupies a sensitive position within the Vaal River System because of its location downstream of the heavily urbanised and industrialised heartland of South Africa. Although it hosts a mining industry of its own in the form of the Klerksdorp (KOSH area) and Free State (Welkom-Virginia area) gold fields, mining activity is considerably greater and more varied in the neighbouring Upper Vaal WMA, and it is the impact hereof that is of greatest consequence to the MVWMA. This impact, however, is focused mainly on the surface water resources associated with the Vaal River. Groundwater resources typically fulfil a secondary water supply function mainly in agriculture (stock farming), except in the northern portion of the study area where water-rich dolomitic formations yield sufficient water for large-scale irrigated agriculture and municipal water supply locally. Elsewhere in the study area, a number of towns rely either partially or wholly on local groundwater resources for a potable water supply. Under these circumstances, it would appear that ambient groundwater resources largely fulfil a natural supporting role in the maintenance of the biophysical environment of the region. These circumstances dictate the need for a groundwater resource directed measures (GRDM) assessment to give effect to the informed consideration of the Reserve as required by the National Water Act (Act 36 of 1998). The GRDM assessment set out in this report provides a basis for the implementation of the Reserve.
Date Published:03/04/2013
Document Type:Research Report
Document Subjects:Water Resource Management/IWRM - Planning and development
Document Keywords:Ground Water
Document Format:Report
Document File Type:pdf
Research Report Type:Consultant
WRC Report No:KV 313/13
ISBN No:978-1-4312-0404-5
Authors:Hobbs P; Colvin C; Maherry A; Bugan R; Clarke S; Petersen C; Rose R; Carstens M
Project No:K8/969
Organizations:CSIR; GEOSS - Geohydrological and Spatial Solutions
Document Size:8 191 KB
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