Characteristics of sediment flow and soil loss of the volcanic Landscape watershed with Agroforestry Landuse
Penulis/Author
LA ODE HADINI (1); Prof. Dr. rer. nat. Junun Sartohadi, M.Sc. (2); Dr.rer.nat Muhammad Anggri Setiawan, M.Si (3)
Tanggal/Date
2019
Kata Kunci/Keyword
Abstrak/Abstract
The upper watershed of the volcanic landscape in Indonesia commonly has very thick soildepth and land
use of agroforestry. Landuse and geophysical characteristics influence the characteristics of sediment flow
and soil loss. Very view studies focus on sediment flow and soil loss of agroforestry in the upper watershed
of volcanic landscapes. In this study, quantitative investigations were carried out to examine the sediment
rate, soil loss rate, material type of sediment and the relationship of one into another. Outlet of the gully
was selected to measure the flow discharge and sediment sampling for each rainfall even. The results
showed that the sediment rate (Qs) could be predicted based on discharge (Q) and water level (h) with the
following rating curves, Q = 0.8809(h-0.0019)1.2454 and Qs = 0.0274Q1,8623. The soil loss value at catchment
area was 0.836 ton/ha/year and 0.207 tons/ha/year of which was in the form of suspension and bed load.
The contribution of suspension and bed load in the total sediment was 91% and 9% respectively.
