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ABSTRACT -First Degree(2011)
1. KWAME NKRUMAH UNIVERSITY OF SCIENCE AND TECHNOLOGY, KUMASI
COLLEGE OF SCIENCE
DEPARTMENT OF PHYSICS
COMPARISON OF AUTOMATED AND NON-AUTOMATED RAIN GAUGES AT
FOUR DIFFERENT STATIONS IN KUMASI
A REPORT SUBMITTED TO THE DEPARTMENT OF PHYSICS, KWAME
NKRUMAH UNIVERSITY OF SCIENCE AND TECHNOLOGY, KUMASI, IN
PARTIAL FULFILMENT OF THE REQUIREMENT FOR THE DEGREE OF
BSc. METEOROLOGY AND CLIMATE SCIENCE
BY
WILLIAM AGYAKWAH
BASHIRU YAHAYA
SUPERVISOR: DR. LEONARD K. AMEKUDZI
MAY, 2011
2. ABSTRACT
Rainfall amount from four synoptic stations in Kumasi was compared using automated and
non-automated rain gauges. These stations include: Kumasi Airport, Owabi, KNUST
Agromet and Emena. The data from these stations were time synchronized. It was observed
that Owabi, Kumasi Airport and KNUST Agromet recorded the highest rainfall in June,
October, and July respectively. The lowest rainfall amounts were observed in July at Owabi
and in December at Kumasi Airport and KNUST Agromet. The coefficient of correlation
between the automated (tipping bucket and pluvio rain gauges) and non automated (standard
meteorological rain gauge) rain gauges were found to be 0.928, 0.990 and 0.985 for Owabi,
Kumasi Airport and KNUST Agromet stations respectively. The relative difference for
Owabi, Kumasi Airport and KNUST Agromet were 0.274202 ± 0.13431, -0.02457 ± 0.06622
and 0.211133 ± 0.11147 respectively. The findings of this work showed that there is a perfect
agreement between the automated and non-automated rain gauge measurements. Hence, the
automated rain gauge can be used as a complement of non-automated rain gauge for
measurement of rainfall amount.