weir construction and its operation in the rewetting and reforestation site on March
5 and August 20, 2014. Figure 25.5 shows the groundwater fluctuation and monthly
rainfall data from December 2012 until May 2017.
Before the weir construction on March 5, 2014, the GWL was lower than
À1.25 m, which is the lower limit of the observation equipment, and it was lowered
to approximately À1.6 m. After the weir construction, the GWL raised rapidly up to
approximately 60 cm even at a point approximately 100 m away from the weir. The
water level fell below À1 m during the drought in March 2015, and the dam was
reinforced. The water level has been maintained over approximately À80 cm
since then.
Fig. 25.3 Meteorological tower (4 m) at the rewetting and reforestation site in Tanjun Leban
village (left at February 2013 and right at February 2019)
Fig. 25.4 Construction of weir in Tanjun Leban village (left on March 5, 2014 (dry season) and
right on August 20, 2014 (wet season))
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667
5 and August 20, 2014. Figure 25.5 shows the groundwater fluctuation and monthly
rainfall data from December 2012 until May 2017.
Before the weir construction on March 5, 2014, the GWL was lower than
À1.25 m, which is the lower limit of the observation equipment, and it was lowered
to approximately À1.6 m. After the weir construction, the GWL raised rapidly up to
approximately 60 cm even at a point approximately 100 m away from the weir. The
water level fell below À1 m during the drought in March 2015, and the dam was
reinforced. The water level has been maintained over approximately À80 cm
since then.
Fig. 25.3 Meteorological tower (4 m) at the rewetting and reforestation site in Tanjun Leban
village (left at February 2013 and right at February 2019)
Fig. 25.4 Construction of weir in Tanjun Leban village (left on March 5, 2014 (dry season) and
right on August 20, 2014 (wet season))
25 Case Study on Community-Based Water Management in Tropical Peatland
667