Herverspreiding van grondwater in drie subhabitatte van ‘n burkea ‐savanna redistribution of groundwater in three sub habitats of a burkea sa vanna

Uittreksel

Grondwaterherverspreiding vind vinnig in die hele grondprofiel van drie subhabitatte nl. Eragrostis pallens, Ochna pulchra en Grewia flavescens van ‘n Burkea‐savanna plaas. Na ‘n reënbui van 50 mm herversprei water binne 12 uur tot op ‘n diepte van 90 cm in ‘n sandgrond wat as die Chesterserie van die Huttonvorm geklassifiseer is. In die E. pallens en O. pulchra subhabitatte vind wateropname hoofsaaklik in die boonste 60 cm van die grondprofiel plaas terwyl vog vrylik beskikbaar is in die ondergrond selfs in die droogste maande nl. Junie, Julie en selfs Augustus. In die G. flavescens subhabitat vind wateropname deur die hele grondprofiel plaas tot op ‘n diepte van 120 cm. Die G. flavescens subhabitat blyk meer onderhewig aan vogstremminge te wees.

Abstract

Soil water redistribution occurs rapidly in the soil profiles of three sub habitats i.e. Eragrostis pallens, Ochna pulchra and Grewia flavescens in a Burkea savanna. After a rain of 50 mm the water redistribute to depth of 90 cm in 12 hours time in a sandy soil classified as a Chester serie of the Hutton form. Extraction of soil water from the soil profile in the E. pallens and O. pulchra sub habitats occurs mainly above 60 cm depth, resulting in an ample supply of water beyond this depth even in the dry period of the year. In the G. flavescens sub habitat extraction of soil water occurs through the whole of the soil profile resulting in a much drier sub habitat than the other two sub habitats.

Notes

NDP; SAW

Sentraal Westelike Koöperasie, Posbus 31, Klerksdorp.