American Journal of Environmental Sciences

Transfer Function-Noise Modeling of the Dynamic Relationship between Botswana's Monthly Maximum Temperature and Evaporation

Oliver Moses, Edward Lungu and Bhagabat Prasad Parida

DOI : 10.3844/ajessp.2017.138.148

American Journal of Environmental Sciences

Volume 13, Issue 2

Pages 138-148


In Botswana, the rate of evaporation over open water surfaces is high because the country is characterised by hot and semi arid climatic conditions. The purpose of the study is to investigate the correlation between Botswana's monthly maximum temperature and evaporation and between monthly maximum wind speed and evaporation, for the stations Gaborone, Francistown and Maun and to fit transfer function-noise models between the highly correlated elements. The data were obtained from the Botswana Department of Meteorological Services. Cross correlation analysis revealed that for the selected weather stations, monthly maximum evaporation is much more strongly correlated to monthly maximum temperature than to monthly maximum wind speed. Monthly maximum temperature and evaporation were modelled with transfer function-noise models. The results of the study are crucial mainly to those in water management, agriculture and other similar industries.


© 2017 Oliver Moses, Edward Lungu and Bhagabat Prasad Parida. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.