Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Afrique du Sud → A spatial decision support system for groundwater abstraction impact assessment and licensing

University of Stellenbosch (2005)

A spatial decision support system for groundwater abstraction impact assessment and licensing

Basson, F. C.

Titre : A spatial decision support system for groundwater abstraction impact assessment and licensing

Auteur : Basson, F. C. (Frederick Christoffel)

Université de soutenance : University of Stellenbosch

Grade : Master of Science (MS) 2005

Résumé
Water resources in South Africa are limited and groundwater plays an important role in supporting basic human needs, sustaining ecosystems and enabling industrial and agricultural development. Sound management practices are necessary to ensure sustainable development of water resources. All groundwater usage must be licensed in compliance with the National Water Act of 1998. A Spatial Decision Support System (SDSS) can be used to assist in the groundwater usage licensing process of the Department of Water Affairs and Forestry (DWAF). The main aim of this study was to develop a SDSS, named Groundwater Abstraction & Licence Evaluation Tool (GALET), that could assist in the process of allocating water use licences and determining the local impact of abstraction, based on existing theory and data. The development was done within Arc View 3.2 using the scripting language Avenue. The Sandveld, an arid stretch of land along the west coast of South Africa that is heavily impacted by groundwater abstraction, was the chosen study area. The data collected for this study included existing borehole, recharge, rainfall and geological information.<> GALET proved to be capable of calculating essential information needed to evaluate groundwater abstraction, which included drawdown in the water table, zone of influence and the possible effects on features such as rivers and wetlands. Targeted potential users regarded GALET as a useful tool in the process of licensing and groundwater abstraction impact assessment and plans are under way to implement GALET or a derivative thereof at the DWAF regional offices.

Présentation

Version intégrale (17,40 Mb)

Page publiée le 13 décembre 2014, mise à jour le 4 juillet 2017