SBR- Content.pmd - INBO

3 - Water in the Mekong BasinRainfall generally peaks between April and August (Figure 2).The driest region within the basin is the Korat Plateau whereannual rainfall is mostly between 1,000 mm and 1,600 mm. TheNorthern and Eastern Highlands are the wettest regions withinthe basin with 2,000-2,800 and 2,000-3,000 mm respectively. Overthe period since 1996, there have been no statistically detectabletrends in the pattern of annual rainfall for any of the sites examined(Figure 3).In the LMB,rainfall generally peaksbetween April and AugustFigure 2.Seasonal pattern of rainfall at four sites in the Lower Mekong Basin: Pakse (pink line),Chiang Saen (dark blue), Nong Khai (yellow) and Mukdahan (turquoise).Figure 3.Annual rainfall since 1961 at three sites in the lower Mekong Basin: Pakse (dark blue),Nong Khai (pink) and Mukdahan (yellow).15