Pollution Extent Mapping and Modeling in Hwange Town, Zimbabwe

Ndlovu M.¹, Sunny M. Chikwanha², Tungwarara M. K.³, Mutibura E. R.⁴, Ncube K.⁵, Mazula A.⁵, and Chikumene L.¹

1. University of Zimbabwe

2. Prone Cane Investments (Pvt) Ltd t/a Envirotech, Zimbabwe

3. Midlands State University, Zimbabwe

4. Zimbabwe Open University, Zimbabwe

5. Chinhoyi University of Technology, Zimbabwe

Abstract: For best pollution management practices to be put in place there is need for information and this information can be attained through examining, mapping and modelling the extent of pollution. This information helps in ensuring that resources for pollution management are distributed well and accordingly. The current study was conducted in Hwange to map the distribution of pollution using pollutants such as nitrogen oxides, ammonia, and Total dissolved Solids as indicators of pollution within the sub catchment area. In order to model point and non-point sources of pollution with the assumption of human activities as the main source of pollution, the PLOAD model tool found in BASINS software was used. The most prevalent human activities in Hwange are mining, electricity generation and settlement. Using the PLOAD model and export coefficient method pollutant in each sub catchment were calculated and mapped. The results obtained indicated that the extent and amount of pollutant is directly related to the type of human activity occurring in each sub catchment.

Key words: pollution management, PLOAD, Hwange Town, Zimbabwe