MODELING OF GROUNDWATER IN THE TROPICAL PEATLAND OF SINARWAJO VILLAGE, MENDAHARA ULU DISTRICT, TANJUNGJABUNG TIMUR REGENCY, JAMBI PROVINCE
<p align="justify">Excavation of artificial canals on peatlands has made the groundwater level deeper and causes unsaturated zone become thicker. In this zone, carbon release due to aerobic respiration for decomposition of peat organic material becomes considerably high. Therefore, g...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/30861 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | <p align="justify">Excavation of artificial canals on peatlands has made the groundwater level deeper and causes unsaturated zone become thicker. In this zone, carbon release due to aerobic respiration for decomposition of peat organic material becomes considerably high. Therefore, groundwater management is required as an effort to increase the groundwater level by reducing drainage with the construction of canal blocking. After canal blocks are built, surface water on canal is dammed up and is expected to re-wet the surrounding peat soil. The objective of this research is to simulate the relationship between water level rise on canal and groundwater level around the canal. This model is built from water balance calculations, geological map, and other secondary data calibrated by measurements of groundwater level during field surveys at 21 observation points. <br />
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The simulation result of peatland case study in Sinarwajo Village, Jambi Province shows that the higher water level in canal is increased the higher the groundwater level. This groundwater rise is also controlled by geology under peat layer and distance to the canal. The amount of required groundwater level increments varies because the groundwater level conditions at the time of the survey also vary. The area around oil palm plantation needs more canal blocks. <br />
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The results of this hydrogeological model simulation can provide an overview of the effectiveness of improved soil conditions as part of tropical peatland restoration. The implementation of this water management will have an impact on the improvement of the hydrological cycle in peatlands. One of the model scenarios indicates that if the water in the canal is increased by about 50 cm from the original condition, then the surrounding MAT increase is ± 43 cm from its original state. Another impact of this restoration scenario is the decrease in the amount of carbon released from the peat soil by more than 10 mg m-2 hour-1. <p align="justify"> |
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