For the ELZ, these two facets of landuse, grazing and burning, dominate. However within the ILZ, and particularly along the boundaries of the two zones, grazing, and to a much lesser extent, burning, assume dominance over clearing as disturbance agents. Therefore even though the assessment was notionally reported only for the ELZ, the condition of the uncleared grazing land on the outer margins of the ILZ was taken into account.
Tenure as well as landcover type boundaries were used in the assessment. By definition, the disturbance status of all Unused land was assessed as the lowest class, slight.
This assessment was reported simply as a table of the absolute and relative areas in the four disturbance classes: slight (little or no detectable impact); substantial (detectable but localised impact); significant (widespread significant landscape change); indeterminate (unable to interpret).
These four classes were assigned disturbance ratings of 0, 1, 2, and 0, respectively. A numeric measure was calculated as the sum of the products of the proportional distribution of areas and the respective disturbance ratings above and has a potential range of 0-200. The rating and score were then assigned thus: 0-50 was low (*); 50-100 was moderate (**); >100 was high (***).
Table 14: The distribution of relative area (%) of the four disturbance levels for all landcover types within the ELZ. The score was based on the sum of the products of the percentage areas and the disturbance ratings, slight (0) to significant (2), and assigned 0-50 was low (*); 50-100 was moderate (**); >100 was high (***).
Landcover Slight Substantial Significant Indeterminate Score type _____________________________________________________________________ xTML4 100 0 0 0 * eTML3 75 25 0 0 * wTML3 100 0 0 0 * xTML3 100 0 0 0 * eM2 100 0 0 0 * xM2 100 0 0 0 * eL2 100 0 0 0 * wL2 100 0 0 0 * xL2 44 56 0 0 ** eM1 65 0 0 35 * eL1 100 0 0 0 * wL1 24 0 76 0 *** xL1 58 42 0 0 * wS3 66 0 0 34 * xS3 97 0 0 3 * eS2 100 0 0 0 * wS2 37 0 63 0 *** xS2 12 0 88 0 *** eS1 65 35 0 0 * wS1 68 0 32 0 ** xS1 25 0 75 0 *** xZ3 44 0 0 56 * xZ2 34 66 0 0 ** wZ1 3 0 97 0 *** xH2 100 0 0 0 * xG4 81 19 0 0 * xG3 5 95 0 0 ** xG2 3 0 97 0 *** Littoral 100 0 0 0 * xG1 21 79 0 0 ** xF1 16 0 84 0 ***