showed that the surface water level at Jajangkit canal decreased about 5 cm/day during
the dry season (Fig. 20.17). Meanwhile, Ulin canal had very low surface water level
and even dried out due to the absence of canal blocking to hold and retain water.
This study also proves that during the transition from dry to rainy season, GWL in
Jajangkit was faster than in Ulin as the source of water outflow from peatland has
been closed by the canal blocking (Figs. 20.11 and 20.12). Although peatland water
might still flow out from other canals or evapotranspiration, canal blocking management can store the water and slow down water runoff through canal.
Fig. 20.14 Trends of surface water levels in Jajangkit (left) and Ulin (right) during the dry,
transition from dry to rainy, and rainy seasons
Fig. 20.15 Comparison of the groundwater and surface water levels between Jajangkit and Ulin
canal during the dry, transition from dry to rainy, and rainy season
586
A. Dohong and L. Tanika
the dry season (Fig. 20.17). Meanwhile, Ulin canal had very low surface water level
and even dried out due to the absence of canal blocking to hold and retain water.
This study also proves that during the transition from dry to rainy season, GWL in
Jajangkit was faster than in Ulin as the source of water outflow from peatland has
been closed by the canal blocking (Figs. 20.11 and 20.12). Although peatland water
might still flow out from other canals or evapotranspiration, canal blocking management can store the water and slow down water runoff through canal.
Fig. 20.14 Trends of surface water levels in Jajangkit (left) and Ulin (right) during the dry,
transition from dry to rainy, and rainy seasons
Fig. 20.15 Comparison of the groundwater and surface water levels between Jajangkit and Ulin
canal during the dry, transition from dry to rainy, and rainy season
586
A. Dohong and L. Tanika