Articles by Author: Andiswa Finca

Search results for Andiswa Finca

We found 7 results for you
  1. Exploring ground-based methods for the validation of remotely sensed evapotranspiration

    Exploring ground-based methods for the validation of remotely sensed evapotranspiration

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Accurate estimates of evapotranspiration (ET) are essential when calculating catchment-scale water balances. An open top chamber (OTC), a ground-based method for measuring actual ET, was used to validate modeled ET from earth observation MODIS and agrometeorological data. We studied and...
  2. Modelling annual evapotranspiration in a semi-arid, African savanna: functional convergence theory, MODIS LAI and the Penman–Monteith equation

    Modelling annual evapotranspiration in a semi-arid, African savanna: functional convergence theory, MODIS LAI and the Penman–Monteith equation

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Accurately measuring evapotranspiration (ET) is essential if we are to derive reasonable estimates of production and water use for semi-arid savannas. Estimates of ET are also important in defining the health of an ecosystem and the quantity of water used...
  3. Aboveground biomass production of a semi-arid southern African savanna: towards a new model

    Aboveground biomass production of a semi-arid southern African savanna: towards a new model

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Following a field campaign to determine the species composition, canopy cover, aboveground annual production and leaf area index (LAI) of the semi-arid savanna of north-western Namibia, we present a production model that can be used by graziers to determine the...
  4. Exploring the invasion of rangelands by <em>Acacia mearnsii</em> (black wattle): biophysical characteristics and management implications

    Exploring the invasion of rangelands by <em>Acacia mearnsii</em> (black wattle): biophysical characteristics and management implications

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Australian acacias have spread to many parts of the world. In South Africa, species such as A. mearnsii and dealbata are invasive. Consequently, more effort has focused on their clearing. In a context of increasing clearing costs, it is crucial...
  5. Determining fPAR and leaf area index of several land cover classes in the Pot River and Tsitsa River catchments of the Eastern Cape, South Africa

    Determining fPAR and leaf area index of several land cover classes in the Pot River and Tsitsa River catchments of the Eastern Cape, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Determining the quantum (both annual maxima and minima) and the temporal variation in the leaf area index (LAI), and the fraction of photosynthetically active radiation (fPAR), are three fundamental biophysical characteristics of the plant canopy that should parameterise ecophysiological models...
  6. Estimating evapotranspiration in semi-arid rangelands: connecting reference to actual evapotranspiration and the role of soil evaporation

    Estimating evapotranspiration in semi-arid rangelands: connecting reference to actual evapotranspiration and the role of soil evaporation

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    In a context of water scarcity, efforts to increase landscape production should focus on improving water productivity. This requires an appreciation of the various components of evapotranspiration (ET), including soil evaporation (Es) because the latter reflects ‘unproductive’ water loss. Both...
  7. Coming to grips with 'abandoned arable' land in efforts to enhance communal grazing systems in the Eastern Cape province, South Africa

    Coming to grips with 'abandoned arable' land in efforts to enhance communal grazing systems in the Eastern Cape province, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The communal lands of the Eastern Cape have been regarded as both tools and problems by policy-makers. In particular, communal lands are problematised as environmentally degraded, of suboptimum productivity and constraining economic development. The Eastern Cape Communal Arable Lands Research...