Sample NMS Reference Report by YONTCHANG G - University of ...
Sample NMS Reference Report by YONTCHANG G - University of ...
Sample NMS Reference Report by YONTCHANG G - University of ...
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Table 6: Statistics summaries <strong>of</strong> sowing and flooding dates<br />
Conditions Minimum 25% Median 75% Maximum<br />
1stMar(bold) 1.Mar 8.Mar 16.Mar 26.Mar 24.Apr<br />
1 st Apr 1.Apr 3.Apr 7.Apr 14.Apr 29.Apr<br />
1 st May 1.May 3.May 7.May 18.May 5.Jun<br />
1 st Jun(latest) 1.Jun 4.Jun 9.Jun 16.Jun 29.Jun<br />
1 st Aug(lowlands) 1.Aug 2.Aug 8.Aug 14.Aug 5.Oct<br />
1 st Aug(flooding) 1.Aug 9.Aug 17.Aug 3.Sep 3.Nov<br />
Table 7: summaries <strong>of</strong> flooding risk with crop failure for each week in August<br />
August<br />
Week 1<br />
Week 2<br />
Week 3<br />
Week 4<br />
RETURN PERIODS ( <strong>of</strong> flooding with crop failure)<br />
5 years<br />
6.5 years<br />
3.5 years<br />
5 years<br />
Comment on the summaries:<br />
Graph (v) shows that week 3 and 1 have more variations in the rainfall totals for the week.<br />
Comparing week 3 and 1, it shows that week 3 has more variation than week 1 with almost the same<br />
amount <strong>of</strong> outliers.<br />
What is the distribution <strong>of</strong> sowing dates?<br />
In Douala, farmers always sowed before the start <strong>of</strong> the peak <strong>of</strong> rainfall when the soil is saturated,<br />
especially in August. So, the maximum or latest sowing date is the same for both farmers: day 214<br />
(1.August). Earliest sowing date for bold farmer is day 61 (1 March) opposed to day 153 (1.June) for<br />
latest farmer.<br />
How wider is the season <strong>of</strong> the bold farmer compared to that <strong>of</strong> a latest farmer?<br />
18
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