Show simple item record Stephenson, D. Kgomotso, A.K. Matladi, T. 2010-10-21T13:36:52Z 2010-10-21T13:36:52Z 2006
dc.identifier.citation Stephenson, D. et al. (2006) Reservoir storage requiremens in arid areas, Botswana Journal of Technology, Vol.15, No.1, pp.13-17 en_US
dc.identifier.issn 1019 1593
dc.description.abstract Water reservoir storage requirements are a function of demand and variation in inflow. The greater the variation the greater the storage required to meet a specified draft. The selected recurrence interval of failure also affects the storage required. It is found that the variation in flow increases the lower the average flow. Arid countries such as Botswana are therefore more vulnerable to drought than low mean annual flows would indicate. Rainfall and river flow records for Botswana were analyzed to produce maps that show the coefficients of variation (COV's) over the country.Examples of the use of the charts are given.The COV of river flow is significantly higher than for rainfall. This means that it is theoritically more economic to harvest rain than to attempt to store river flow. There is also less evaporation from rain tanks owing to the smaller surface area to depth ratio. However, the scale of storage also affects economics and rain harvesting affects catchment water balance. en_US
dc.language.iso en en_US
dc.publisher University of Botswana en_US
dc.subject Botswana rainfall en_US
dc.subject Rivers en_US
dc.subject Reservoirs en_US
dc.subject Storage en_US
dc.title Reservoir storage requirements in arid areas en_US
dc.type Published Article en_US

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