By G.A. Ellenbroek

3 and a part years of box learn in Zambia and one other 3 years of processing the information and writing up the implications and conclusions preceded the booklet of this e-book. in this interval many folks have assisted me with the gathering of box information in Zambia and, after repatriation, with the processing of those info within the Netherlands. The learn paintings performed in Zambia was once initiated through the Kafue Basin study Committee of the college of Zambia. The individuals of this Committee felt the necessity to assemble quantitative ecological info to implement their place within the fight for the water rights at the Kafue residences. It used to be was hoping examine of the productiveness of the grasslands at the floodplain and adjoining parts could make certain the anticipated excessive premiums of fundamental creation and the relation of those to the traditional flooding development. those effects might then function a base for the character conservationist, the agriculturalist and the local community to problem the calls for of the Zambia electrical energy corporation, that almost immediately governs the bogus flooding trend. The tools attained to assemble the knowledge on productiveness and plants constitution are very time eating.

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Extra info for Ecology and productivity of an African wetland system: The Kafue Flats, Zambia

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Others remain floating in the lagoons and depressions and, when the water level drops, they are stranded on the floodplain (Fig. 6). 35 Fig. 5. A. Ellenbroek). Fig. 6. A. Ellenbroek) . 5 Floodplain The floodplain proper is the extensive, gently slooping area that is seasonally inundated with Kafue river water. From the river to the edge of the floodplain the water depths vary from over two metres to only a few centimetres; the length of the period of inundation varies accordingly from over six months to just a few weeks .

As a result the water levels of the lagoons are continuously dependent on those of the main river. The vegetation of these lagoons varies from floating 33 W -l:- , • 10 3 15 5 ,I 6 ~ " ,0 71 ,, 8 9 .. , 10 , 11 30 12 •• 0 lSliI;m '- 970 Fig. 1. Schematic cross section of the Kafue Flats at Lochinvar showing the main vegetation zones: 1. main river; 2. levees; 3. lagoons and depressions; 4. floodplain grassland; 5. water meadow; 6. littoral zone; 7. Vetiveria belt; 8. lower termitaria zone; 9. upper termitaria zone; 10.

_ i / ... ~ "'L , o '98' .. A /'. Fig. 18. Rainfall. evaporation, evapotranspiration and relative humidity at Lochinvar National Park during the period September 1978-May 1981. 00 h (in %; averages per 10 days); 3 = Rainfall (in mm per 10 days); 4 = Evapotranspiration ETo (in mm per 10 days); 5 = Screened class A pan evaporation (in mm per 10 days). o ~ ...... \\ '00 20 '0 60 so 00 200 300 the 1978/1979 rainy season, 5 in 1979/1980 and 8 in 1980/1981. However, the rate at which precipitation exceeds evapotranspiration during those periods is usually very high (see Fig.

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