MITIGATION EFFECT OF CO<sub>2</sub> FLUX AND PEAT FIRE RISK BY DRAINAGE CANAL WATER MANAGEMENT, IN TROPICAL PEAT AREA

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  • 熱帯湿地における排水路水位の制御に伴うCO<sub>2</sub>放出量および火災リスクの低減効果
  • 熱帯湿地における排水路水位の制御に伴うCO₂放出量および火災リスクの低減効果
  • ネッタイ シッチ ニ オケル ハイスイロ スイイ ノ セイギョ ニ トモナウ CO ₂ ホウシュツリョウ オヨビ カサイ リスク ノ テイゲン コウカ

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Abstract

<p> Haze from Peat fire is serious transboundary problem in Indonesia and neighboring countries. In this study, CO2 flux and peat fire risk reduction effect by water level controlling in drainage canal were evaluated. Firstly, meteorological data, ground water level and CO2 flux data were monitored at Kepau Baru village in TebingTinggi Island, Riau Province. And then, ground water level and CO2 flux estimation model were developed and applied. The calculated ground water level showed good agreement with observed data (NS>0.5). The accuracy of calculated CO2 flux was 2.5 (tC/ha/year) for short term observed data and 5.5 (tC/ha/year) for long term observed data. By using the proposed model, the mitigation effect of water level controlling in drainage canal was estimated. In 100cm dam up case, CO2 flux was reduced in 17.2%, and thickness of unsaturated peat layer was reduced 46.4%.</p>

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