Tableau 2
Déficits pluviométriques moyens observés par rapport à la date de rupture sérielle sur la période 1961-1990. Average rainfall deficits observed with respect to the date of the breakpoint during the period 1961-1990.
| Postes Pluviométriques | Test de Pettitt | Segmentation de Hubert et Carbonnel | Moyenne avant rupture (mm) | Moyenne après rupture (mm) | Baisse (%) |
|---|---|---|---|---|---|
| Zone sahélienne | |||||
| Barsalogho | 1976** | 1964; 1979 | 642 | 450 | 29,9 |
| Bourzanga | 1978** | 1978 | 596 | 428 | 26,5 |
| Bouroum | 1978* | - | 620 | 464 | 25,1 |
| Tougouri | 1977** | 1977 | 648 | 489 | 24,5 |
| Zone soudano-sahélienne | |||||
| Boulsa | - | 1968 | 820 | 642 | 21,7 |
| Kaya | 1976* | 1976 | 736 | 595 | 19,1 |
| Korsimoro | 1969* | 1969 | 842 | 611 | 27,4 |
| Mané | 1969* | 1967 | 768 | 615 | 19,9 |
| Tikaré | 1976* | 1967 | 836 | 631 | 24,5 |
Les signes * et ** signifient que la rupture est respectivement significative à 95 et 99% selon le résultat du test de Pettitt (1979). The signs * and ** mean that the breakpoint is respectively significant to 95 and 99% according the result of Pettitt test ((1979).
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