Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur Journal of Applied Geospatial Information
Rossita Yuli Ratnaningsih
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Multi-Temporal Chlorophyll-A Monitoring in Lake Matano and Towuti Using Landsat 8 OLI Imagery Lalu Muhamad Jaelani; Rossita Yuli Ratnaningsih
Journal of Applied Geospatial Information Vol 3 No 1 (2019): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.352 KB) | DOI: 10.30871/jagi.v3i1.1065

Abstract

Lake Matano and Towuti are two of 15 lake priorities in Indonesia. For preservation purposes, a routine water quality monitoring from satellite is needed. In this study, 11 scenes of Landsat 8 data were processed to produce chlorophyll-a concentration as an indicator of water quality condition on these two lakes. The result showed that water quality in Lake Matano and Towuti were in low cholorphyll-a condition with chlorophyll-a concentration ranged from 0.000– 2.298 mg/m3, 0.000-2.236 mg/m3, respectively. The accuracy of estimated Chlorophyll-a in these two lakes were affected by an inaccurate of atmospheric corrected data. To improve the accuracy, a more accurate atmospheric correction algorithm for Landsat 8 was still required.
Sediment Transport Modeling at the Bogowonto River Bend Using HEC RAS 6.6 Purwantoro, Didik; Yekti, Mawiti Infantri; Ratnaningsih, Rossita Yuli; Rofi’ah, Nanda Nur; Mayra, Farah
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i2.91818

Abstract

River bend erosion is a major concern for river engineers because it affects channel stability and navigation safety. Erosion along the outer bank and deposition along the inner bank are the primary processes responsible for the meandering pattern of rivers. This study investigates the effect of discharge variations on scour depth in a meandering reach of the Bogowonto River using numerical modeling with HEC-RAS 6.6. Simulations were carried out for six discharge scenarios corresponding to return periods of 2,5, 10, 20, 50, and 100 years (Q2, Q5, Q10, Q20, Q50, and Q100). The historical rainfall data collected from 2002 to 2021. Limantara Unit Hydrograph used for rainfall-runoff modelling. The HEC-RAS simulation results of the 2-year return period (Q2) reveal that sedimentation occurs at five points along the Bogowonto River bend in Purworejo District. In particular the greatest accumulation occurred at the apex of the bend (STA 17), where the bed sediment thickness reached 4.175 m at the Q100 discharge. The simulation results show a uniform sedimentation pattern across the entire bend cross-section, likely due to model limitations that prevent detailed representation of cross-flow patterns.
Co-Authors Didik Purwantoro, Didik Jaelani, Lalu Muhamad Mawiti Infantri Yekti Mayra, Farah Rofi’ah, Nanda Nur