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J13. Dent, Schulze and Angus (1988) * used the information to devise a localized areal
method of soil moisture budgeting to determine inter alia. the runoff from dryland crops,
as well as crop water requirements under irrigation. Selected data are presented in the
latter report. A complete data-set is available from the Computing Centre for Water
Research, University of Natal, Private Bag X01, Scottsville, 3209, showing the estimated
water yield (surface and groundwater runoff) under given probabilities, for various soil
depths and textures, in time steps of one month up to 12 months after planting, of
specified crops for each homogeneous climate zone. Such data provide water resources
information for the rapid initial assessment, for instance, of runoff into farm irrigation
dams.
Table J13: Homogeneous climate zones in NatallKwaZulu (north to south).
Source:
Note:
Zone
543 - 549
523 - 533
509 - 510
383 - 426
363 - 378
360
282 - 292
279 - 280
269 - 277
254
After Dent, M.C., Schulze, R.E. and Angus, G.R., 1988. Crop water
requirements, deficits and water yield for irrigation planning in southern
Africa, WRC Report No. 118/1/88, Water Research Commission, Pretoria,
183 p. and map.
The zones include that part of KwaZulu situated in the Transvaal and also
the northern part of Transkei surrounded by NatallKwaZulu. Some zones
may include other land outside NatallKwaZulu.
* See Dent, M.C., Schulze, R.E. and Angus, G.R., 1988. Crop water requirements, deficits and water
yield for irrigation plaming in southern Africa, WRC Report No. 11811/88, Water Research
Commission, Pretoria, 183 p. and map. (The publication includes a map of homogeneous climate
zones in southern Africa).