Item Details

Title: Assessment of nutrient retention by Natete wetland Kampala, Uganda

Date Published: 2010
Author/s: V. Kanyiginya, F. Kansiime, R. Kimwaga, D.A. Mashauri
Data publication:
Funding Agency :
Copyright/patents/trade marks: Elsevier Ltd
Journal Publisher:
Affiliation: Makerere University, Institute of Environment and Natural Resources, P.O. Box 7298, Kampala, Uganda
bUniversity of Dar es Salaam, Faculty of Civil Engineering and the Built Environment, Department of Water Resources Engineering, P.O. Box 35131, Dar es Salaam, Tanzania
Keywords: Cyperus papyrus
Natete wetland
Nutrient retention


Natete wetland which is located in a suburb of Kampala city in Uganda is dominated by Cyperus papyrus
and covers an area of approximately 1 km2
. The wetland receives wastewater and runoff from Natete
town which do not have a wastewater treatment facility. The main objective of this study was to assess
nutrient retention of Natete wetland and specifically to: determine the wastewater flow patterns in the
wetland; estimate the nutrient loads into and out of the wetland; determine the nutrient retention by
soil, plants and water column in the wetland; and assess the above and belowground biomass density
of the dominant vegetation. Soil, water and plant samples were taken at 50 m intervals along two transects cut through the wetland; soil and water samples were taken at 10 cm just below the surface. Physico-chemical parameters namely pH, electrical conductivity and temperature were measured in situ.
Water samples were analyzed in the laboratory for ammonium-nitrogen, nitrate-nitrogen, total nitrogen,
orthophosphate and total phosphorus. Electrical conductivity ranged between 113 lS/cm and 530 lS/cm
and the wastewater flow was concentrated on the eastern side of the wetland