DBPapers
DOI: 10.5593/SGEM2016/B31/S12.105

UTILISING GEOSPATIAL WATER RESOURCES MICROBIAL INTEGRITY INDEX FOR QUATERNARY CATCHMENTS LEVEL IN LIMPOPO SOUTH AFRICA

T. N. Mushamba,Y. Arisoy
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-61-2 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 1, 805-812 pp

ABSTRACT
A multivariable water resources microbial water quality variability index at quaternary catchment level is an essential tool in water resources planning. In this study a multi variable land use attribute index is developed and used to draw inferences on potential microbial water quality variation within 206 quaternary catchments. The index was developed based on three anthropogenic activities: agriculture, waste water effluent disposal and human settlements, with the intention of classifying quaternary catchments based on potential microbial water integrity variation. Main category index values are allocated based on theoretical microbial loads based on the three land use attributes. Sub categories for effluent disposal, human settlements and agriculture are developed based on the Green Drop criteria, population-catchment ratio and a weighted containment mean ratio between agriculture zone and catchment respectively. Ultimately a 3 variable 8 point microbial water quality variability index was used to classify quaternary catchments. The multivariable index technique can be used to evaluate vulnerability in a systematic manner to aid decision making in water resources management. The practical application of the technique in water resources management can be improved by targeted water quality sampling and spatial correlation. This is a vital essential step to improve water resource management and design of programmes to reduce deterioration of microbial water quality.

Keywords: Water resources, geospatial, microbial, index, vulnerability