INTERSEPSI CURAH HUJAN DI HUTAN HUJAN TROPIS: STUDI KASUS DI TAMAN NASIONAL LORE LINDU SULAWESI TENGAH
ABSTRACT: This filed research
was conducted from Apr 2006 to .Juni 2007 at natural tropical rainforest of the
Lore Lindu National Park, Central Sulawesi. The objectives were to study the
effect of rainfall properties and vegetation characters on interception losses through
mathematical model approach, to estimate the rainfall interception losses and
to determine the dominant factors influencing them. Observation of vegetation
characters in the study area indicated that the vertical and horizontal
structure were in good conditions with high leaf area index (LAI 4.8-6.43
m2.m-2 ), ground cover (68.5-92.59%) and wide canopy at average 5.59
(12.05-9.83 m2 Total rainfall (P) on the first measuring phase (Apr 2006-March
2007) was 1502,6mm for 172 events. Dominant rainfall depth was 0.5-5mm for 78
events with cumulative rainfall at 182.2mm or 12.3%, of P. Dominant rainfall
intensity was 1--10 mm per hour for 121 events with cumulative rainfall 140.2
mm or 9.3 % of P. The mathematical relationship between rainfall properties and
vegetation characters with throughfall, stemflow and interception loss show
that rainfall depth and LAI are two factors that strongly influences as
expressed: interception loss: Ic= 0. 786+0.343* P+0.051 *LA I (R2=73,77)
Application of this equation and Gash model to the second measurement phase
(Apr 2007-Juni 2007) gave good agreement on interception estimate and
sensitivity, and considering data requirement and calculation procedure this
equation is applicable for interception estimation. The critical point of this
result is the rainfall properties on Lore Lindu National Park that is very
important to forest management, especially in controlling of flooding.
Penulis: Abdul Rauf, Hidayat
Pawitan, Tania June, Cecep Kusmana
Kode Jurnal: jppertaniandd080109
