The 2012 RUFORUM Biennial Conference is the third in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholers in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. The third Biennial Conference was attended by 657 participants.This record contains an extended abstract accepted under the theme of Risk and Vulnerability
Estimation of Pollution loading into Lake Kivu Basin
Abstract:
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.
Cette étude a pour objectif d’estimer la charge des sédiments
et des nutriments dans le micro-bassin du Lac Kivu. La
concentration de sédiment total en suspension (STS) et l’Azote
total (AT) et le phosphore total (PT) ainsi que la Demande
Biologique en Oxygène ont été mesurés par semaine durant
une année. En plus de STS, DBO, AT et PT, la charge a été
estimée par le débit de l’eau de la rivière. Les pics de la DBO
ont été observés en Septembre, Novembre, Avril et Juillet avec
des valeurs relativement élevées en Novembre. La
concentration de STS a été très élevée en Août et trop basse
en Octobre. Le pic du débit de la rivière Lwiro a été observé
en May. La concentration de AT été élevée en Mais est basse
en en Février et en Avril ; par contre la concentration de PT
été basse entre Août et Octobre. La charge de STS et PT ont
leur pic en Mai alors que la charge élevée de l’AT est en Février.
Ces résultats suggèrent que le pic de décharge des sédimentset des nutriments dans le Lac Kivu a travers la Rivière Lwiro
coïncident avec les début des cultures dans le bassin.
Language:
English
Extended abstracts submitted under Risk and Vulnerability
Date of publication:
2012
Country:
Region Focus:
Central Africa
Collection:
RUFORUM Conferences and Workshops
Agris Subject Categories:
Agrovoc terms:
Licence conditions:
Open Access
Access restriction:
Form:
Printed resource
Publisher:
Notes:
