Estimation of Pollution loading into Lake Kivu Basin
Abstract
152 words
This study aimed at estimating sediment and nutrient loading
into Lake Kivu from River Lwiro micro-catchment in Eastern
DR Congo. Total Suspended Sediment (TSS), Total Nitrogen
(TN), and Total phosphorus (TP) concentration, and Biological
Oxygen Demand (BOD) were measured weekly for one year.
In addition, TSS, BOD, TP and TN loads were estimated from
the water flow. The BOD peaks were observed in September,
November, April and July, with a relative high value in
November. TSS concentration was highest in August and lowest
in October. Peak discharge was observed in May. TN
concentration was highest in February and April, while TP
concentration was highest in May and lowest between August
and October. TSS and TP loads had their highest peak in May
while TN load was highest in February. These findings suggest
that high sediments and nutrient loading coincide with the state
of the cultivated land at the start of the season.
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