Papers by NKUNDABOSE Jean Paul
INGABIRE THEOGENE, 2019
The present study was carried out to assess air quality and respiratory health status at Delhi Un... more The present study was carried out to assess air quality and respiratory health status at Delhi University. Delhi University is an open campus and surrounded by commercial areas, residential, Traffic intersection and major road network which are probably the main source of air pollution in this campus. The pollutants considered for this study were four criteria pollutants (NO 2 , SO 2 , PM 10 and PM 2.5) along with pulmonary function test for diagnosing any obstruction caused by air pollution. Sampling site has been monitored for 4 hours basis at Department of Environmental Studies within 2months (February and March). Temporal and Spatial variation of pollutants was performed by Excel, Air quality index was computed by mathematical equation established by EPA and pulmonary function test was conducted by using spirometer as tool. The results revealed that fine and coarse particulate matter concentrations was 2.56 times higher than permissible limit established by Central pollution Control Board in India. A part from this finding NO 2 and SO 2 concentration in this University remain under permissible limit. Among 50 students participated in pulmonary function test, the study has found 2% student has severe obstruction (FEV1/FVC, <=30 % < 50%), 20% students have moderate obstruction (FEV1/FVC, <=50 %< 80) and 78% have mild obstruction this could be because of long exposure to high concentration of particulate matter.
ASSESSMENT OF DRIVING FACTORS OF FLOODS IN RWABASHYASHYA MARSHLAND (KAMONYI DISTRICT), 2018
Nowadays, floods events occur throughout the world and cause many negative impacts including agri... more Nowadays, floods events occur throughout the world and cause many negative impacts including agricultural production, loss of lives and property damage. In Rwanda agricultural activity, occupy around 90% of all economic activities and every year natural disaster like draught and flood affect agricultural production. In heavy rain, people lost their crops due to the destruction of their blocks of lands. The huge number of flood hazards of today has different driving factors. Recently, Rwabashyashya marshland has suffered the high extent-flooding problem did not happened before , probably as a result of heavy rainfall, steep slopes and land use/land cover change. The main aim of this work is to contribute to flood management in Rwabashyashya marshland through the assessment of driving factors of floods from Rwabashyashya sub catchment (26.63724 km2) in Kamonyi district southern Rwanda. Interviewing survey and field visits were used for historical flooding. ARGIS 10.4 used a Digital Elevation Model (DEM) to delineate the watershed and to produce watershed slope map. The generated land use maps were used to detect land use/land cover change and also the land cover types were adopted to estimate the runoff coefficient of the sub catchment to calculate a weighted runoff coefficient. The rainfall intensity was determined using the rainfall data obtained from Gacurabwenge meteorological station that is near (5 km) the marshland and considering the time of concentration. The catchment profile and empirical formulae were used to compute the time of concentration. A simple rational formula method with area correction was used to estimate the total discharge from the catchment. Manning formula was adopted to determine the hydraulic discharge of the natural stream channel. The results show that agricultural land use dominates in the sub catchment with about 60.38% in 2016 and the built up area show rapid increase from 0.487 ha to 538.68 ha in 2008 and 2016 respectively. The weighted runoff coefficient was found to be 0.39, the time of concentration was determined to be 0.896 hour for the whole watershed and the hydrological flow rate was estimated to be 204.29m3/s. Hydraulic discharge was found to be 4.83m3/s and which is too less for channel to handle the hydrological discharge. Based on the results obtained, we can draw conclusion that the main contributors to floods in Rwabashyashya marshland are land use/land cover change (increased impervious surfaces), heavy rainfall and the steep slope of the area which is ranging from 1506m to 1904m. Some floods management measures were proposed. To sum up, this research generated should be transferred to other Rwandan marshlands to decide measures of protection floods and as well integrated flood management in order to contribute to the achievement of sustainable development of the-country.
Keywords: Rwabashyashya Marshland, flood management, driving factors, land use/land cover change, sub catchment, measures.
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Papers by NKUNDABOSE Jean Paul
Keywords: Rwabashyashya Marshland, flood management, driving factors, land use/land cover change, sub catchment, measures.
Keywords: Rwabashyashya Marshland, flood management, driving factors, land use/land cover change, sub catchment, measures.