Rainfall interception in three contrasting lowland rain forest types in Central Kalimantan, Indonesia

TitleRainfall interception in three contrasting lowland rain forest types in Central Kalimantan, Indonesia
Publication TypeJournal Article
Year of Publication2007
AuthorsVernimmen RRE, Bruijnzeel LA, Romdoni A, Proctor J
JournalJournal of Hydrology
Date PublishedJul
Type of ArticleArticle
ISBN Number0022-1694
Accession NumberISI:000248166500007
KeywordsBORNEAN, EVAPORATION, FOREST, HEATH, heath forest, interception, leaf area index, lowland evergreen rain, MODELING RAINFALL, NATURAL PLANT-COMMUNITIES, PHYTOMASS STRUCTURE, rainfall characteristics, SOUTHERN VENEZUELA, STEMFLOW, THROUGHFALL, Tropical forest, WESTERN AMAZONIA

Rainfall interception was quantified and modeled for a Lowland Evergreen Rain Forest (LERF) and two Heath Forests (HF) of contrasting stature during a one-year period at a remote site in Central Kalimantan, Indonesia. Throughfall was measured using a roving gauge approach using 18-20 gauges per forest type. Throughfall was 82.8% of incident rainfall in the LERF vs. 89.1% in tall HF and 76.7% in stunted HF. Corresponding stemflow fractions were 0.8%, 1.3% and 2.0% of rainfall, respectively. Interception losses derived for the LERF (16.4%) and the tall HF (9.6%) were close to findings obtained for similar forest types elsewhere but the high interception toss for the stunted HF (21.3%) was unexpected. On the basis of canopy structural characteristics and wet canopy evaporation modeling it is concluded that throughfall in the stunted HF was underestimated and that the specific nature of the HF required a more intensive sampling arrangement. Throughfall sampling schemes in tropical forests, associated errors and hydrological implications are discussed. (C) 2007 Elsevier B.V. All rights reserved.

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Alternate JournalJ. Hydrol.