andi makkawaru
@un-sultra.ac.id
Civil Engineering
Universitas Sulawesi Tenggara
RESEARCH INTERESTS
Geomorphology, Hidrology, Urban planning, remote sensing
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Uca, Muhammad Ansarullah S. Tabbu, and Andi Makkawaru
IOP Publishing
Abstract Erosion and sediment that occurs in the basin is very important to be studied scientifically.Forcasting of sediment yield in a basins area is important to used to evaluate the land-use/landcover change, soil erosion hazard, planning, water quality, water resources in river, and to determine the extent of the damage that occurred in the basins. The algoritmh lavenberg-marquardt can be used to forcest the total of sediment yield the basin area. Artificial neural networks using feedforward multilayer percePsron with three learning algorithms namely Levenberg-Marquardt. The number of neurons of the hidden layer is three to sixteen, while in the output layer only one neuron because only one output target. The root mean square error (RMSE), mean absolute error (MAE), coefficient of determination (R2 ), and coefficient of efficiency (CE). The performance value in the training process, R2, and CE (0.98 and 0.98). As well as for the testing process, R2 and CE (0.98 and 0.97). Based on the performance statistics value, LM is very suitable and accurate for to forcesting by modeling the non-linear complex behavior of sediment yield responses to water discharge, intensity of rainfall, and water depth in the river.
Laode Ngkoimani, Laode Saleh Isa, Jahidin, Syamsurizal, Suryawan Asfar, and Andi Makkawaru
IOP Publishing
L O Ngkoimani, Jahidin, Haryati, S Razak, A Makkawaru, S Asfar, and M R Muin
IOP Publishing
The measurement of magnetic susceptibility and the content of gold (Au) on sediments in the Bombana Gold Mining Area (BGMA) has been done. The samples analyzed totaled 121 samples. The magnetic susceptibility values was measured using Low Field MS2B Bartington Susceptibility meter, while the contents of gold (Au) was measured using X-Ray Nitton. Generally, the lower the value of magnetic susceptibility, contents of gold (Au) on the sediment is higher. Based on this result, the magnetic susceptibility can be used as one of the parameters and/or the alternative methods on the exploration of gold in BGMA.