124
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.00
0.10
0.20
0.30
0.40
0.50
Stage(m)
Discharge (m 3 /s)
Fig. 5 The stage-discharge
relationship of Njewa
wetland in Lilongwe,
Malawi, over 304 Julian
days
Table 4 Summary of results of the hydrological assessment of Njewa wetland in Lilongwe,
Malawi
Serial number
Parameter
Unit
Value
1.
Surface runoff volume (SRO volume)
m
3
1,034,225.93
2.
Total area of the delineated catchment area
ha
171.00
3.
Surface runoff depth
m
0.60
4.
Rainfall
mm
932
5.
Surface runoff coefficient
0.65
6.
Estimated baseflow (BF)
m
3 /s
0
0.000
0.100
0.200
0.300
0.400
0.500
0.600
0
5 0
100
150
200
250
300
350
Discharge (Q) in m 3
/s
Days in a Julian Year
Fig. 4 A hydrograph
showing annual streamflow
discharge at Njewa wetland
in Lilongwe, Malawi
(2017/2018)
surface water exchange. The application of computer simulations for modeling wetland flows could also be an interesting area to consider. Land use planners should
monitor developments in urban wetlands to minimize the risk of urban flooding.
A. K. Mkulama et al.