dc.contributor.author | Abdalla, Felix | |
dc.date.accessioned | 2014-02-25T13:18:12Z | |
dc.date.available | 2014-02-25T13:18:12Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Abdalla Felix (2011). Effect Of Sediment Loading From The Museum Hill Round-About Reconstruction On Benthos Of Nairobi River. aGRO 2011 Biennial Conference The Inaugural Biennial Conference of the Faculty of Agriculture ‘OPTIMIZATION OF AGRICULTURAL VAUE CHAINS FOR SUSTAINABLE DEVELOPMENT’ 26th – 28th September | en_US |
dc.identifier.uri | http://hdl.handle.net/11295/64957 | |
dc.description.abstract | In determining the effect of sediment loading resulting from the museum hill round-about
reconstruction on benthos of Nairobi River, a study was carried out with the objective of
determining the abundance of macro and meio benthos in relation to sediment loading at the site
of study. The method used for this experiment involved determination of sediment loading at
various sampling sites; in this case the total suspended solids were analyzed to determine the
sediment loading in two streams (Kirichwa 1 and Kirichwa 2) which cover the study site. The
analysis of benthos was done by scooping the bottom substrate from the river at various
sampling points. The samples were passed through sieves of different sizes depending on the
type of analysis (Meio or Macro) and processed for observation under compound microscope
and the number of benthos present counted. A similar procedure was done on samples obtained
from a selected control site. This was a seasonal stream at the university of Nairobi sports ground
that had a variety of benthos and was found to be suitable as a control. Analysis of sediment
loading was done by filtering water collected from the sampling points with a suction pump with
chlorophyll A filtration filter papers were dried in an oven at 78oC and stored in desiccators for
30 minutes then weighed. After filtration of the sampled river water the filter papers with trapped
substrate were dried in an oven at 78oC for 48 hours and then weighed. The wet mass and dry
mass of the samples was obtained and was divided by the respective volume of water filtered to
determine the sediment load in g/ml. The sediment load and abundance of benthos from the
respective sampling sites were compared and a relationship was established. The key results
showed a general variation in diversity, type and abundance of benthos with increase in sediment
loading. In conclusion, it was observed that despite the fact that sediment loading may not be the
only factor affecting the abundance of benthos along the river gradient, at the sampling points
there was a general decrease in benthos with sediment loading. | en_US |
dc.language.iso | en | en_US |
dc.title | Effect Of Sediment Loading From The Museum Hill Round-About Reconstruction On Benthos Of Nairobi River | en_US |
dc.type | Presentation | en_US |