Geoscience Reference
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in order to simulate its behavior. Similarly, the maximum and the minimum
outflows were back routed through the reservoir. The change in variation
of storage, over time for both inflows and outflows was determined and
plotted.
2.4.
Delineation of flood zones
This involved the demarcation of the levels of inundation of the flood plains
for various return periods of the annual maximum inflows. The stage of
flows of the selected return periods was determined by the use of the rating
curves at the gauging station on the outlet of Lake Albert. A section of the
lake and flood plains was then drawn and the water levels for the respective
inflows of selected return periods indicated.
2.5.
Field visits
The study area was visited, during which simple interviews were conducted
concerning economic activities in the area, the flood history of the lake
and other information, which was used to complement on the analytical
findings of this study. Photographs of areas susceptible to flooding were also
taken. Proposals for flood mitigation considered the feasibility, applicability,
sustainability, affordability, and environmental impacts in the region.
3. Results
3.1.
Statistical analysis
The statistical parameters for the selected data series were derived and are
shown in Table 2.
The year of occurrence, the flow and return periods of the critical years
are shown in Table 3. From the results, it is evident that the return period
for the maximum outflow of (59 years) is greater than that of the maximum
inflow (28 years). This implies that the maximum inflows into Lake Albert
Table 2.
Statistical parameters for the data series.
Data series
µ
σ
α
u
Annual max. inflows
2935.1
1935.0
1547.7
3828.4
Annual max. outflows
1341.1
465.69
363.10
1550.7
Annual min. inflows
1062.1
599.24
467.22
1331.8
Annual min. outflows
996.17
336.47
262.35
1114.7
