Author(s): Ahmad Reza Kasury; Joko Sujono; Rachmad Jayadi
Linked Author(s):
Keywords: Rainfall intensity; Leaf inclination; Canopy storage; Throughfall
Abstract: Rainfall redistribution by canopy is a hydrological phenomenon that affects streamflow and erosion. Rainfall redistribution by the canopy is highly determined by canopy and rainfall characteristics. Canopy saturation is influenced by gross rainfall (Pg), Ri and leaf inclination. This research focuses on canopy saturation process based on rainfall intensity (Ri) and leaf inclination. The observations were performed on 4 different types of leaf characteristics that are Pinus merkusii, Acaciella angustissima, Artocarpus heterophyllus and Anthocephalus cadamba. Ri has no significant effect on canopy surface with needle leaf-like Pinus merkusii but gives a significant influence on another leaf shape. Artocarpus heterophyllus canopy storage (S) will be saturated faster than Acaciella angustissima and Anthocephalus cadamba. In Acaciella angustissima which composed of compound leaves, the surface of the canopy is very responsive to the increase of Ri by increase in Tf (throughfall). In Pinus merkusii, Tf occurs after 12.4% gross rainfall (Pg), for Artocarpus heterophyllus Tf occurred after 62.9%Pg. Tf in Acaciella angustissima occurred after 14.7%Pg and Tf in Anthocephalus cadamba occurred after 50.0%Pg. This difference is caused by the water droplet at Ri 10 mm/hr which changes the inclination and leaf curvature, canopy porosity, leaf shape, leaf angle, and stiffness.
Year: 2018