oa Botswana Notes & Records - Aspects of Seasonal Dynamics of Flooding in the Okavango Delta

Volume 37, Issue 1
  • ISSN : 0525-5090



Seasonal changes in inundation area and peak flood occurrence in the Okavango Delta are analysed using a multiple regression technique. The multiple regression models developed constitute useful and simple tools for predicting inundation area and peak flood occurrence in the Okavango Delta. Explanatory variables in the model are various expressions of long-term and short-term antecedent rainfall and inflow conditions. The analyses presented provide insight into the role of storage in the dynamics of flood in the system: hydrological inputs are accommodated in the large system storage, and hydrological response is strongly dependent on the factors affecting (slow!) release from that storage. Based on the analyses, the classic model of kinematic flood wave propagation has been adapted accordingly.

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