Abstract
This geographic sub-watershed is in Loa Janan, position 116°49′ EL–117°08′ EL and 0°34′ SL–0°45′ SL, with an extent of 644.2 km2 that includes eight villages. Characteristics of rain in this area are included in the area class III (1,500–2,000 mm/year), with a bimodal or double wave rainfall model with C pattern. The highest rainfall period is in December and April, and the lowest rainfall in September and November. The sub-watershed has level Q (±9.8 %), or rainfall type A (very wet area with tropical wet vegetation), and an E1 agroclimate zone.
Monthly water balance indicated that this area has a potential growing season available all year round (12 months), a water surplus for 8 months (478.8 mm/year), and a water deficit for about 3 months (44.5 mm/year).
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Sujalu, A.P., Ismail (2015). Water Balance Analysis for the Determination of Available Growing Season at Sub-Watershed, Loa Janan, East Kalimantan. In: Hongladarom, S. (eds) Food Security and Food Safety for the Twenty-first Century. Springer, Singapore. https://doi.org/10.1007/978-981-287-417-7_12
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DOI: https://doi.org/10.1007/978-981-287-417-7_12
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