Loss functions for sugar-cane: Depth and duration of inundation as determinants of extent of flood damage

Abstract

The paper aims to discuss the methodology used to develop loss functions for sugar-cane, with reference to the treatment of depth and duration of inundation as the main determinants of the extent of damage. The Mfolozi floodplain in Northern KwaZulu-Natal served as the study area. Loss functions for sugar-cane, for ex ante estimation of damage to harvests and crops, were developed for inclusion in a flood damage simulation model (FLODSIM) developed by the Department of Agricultural Economics of the University of the Free State in collaboration with the Water Research Commission. Depth of inundation was calculated in relation to the height of inundated sugar-cane in order to establish the extent of damage. Duration of inundation was taken into account by determining the maximum period of complete inundation after which the cane would be destroyed. Loss functions were determined for calculation of damage to harvests and damage to crops respectively.

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