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All Journal Jurnal Teknik Sipil
Eko Yulianto
University Of Tanjungpura
Civil Engineering, Building, Construction & Architecture

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THE SEROK RIVER CATCHMENT FLOOD HYDROGRAPH Herlianda Herlianda; Nurhayati Nurhayati; Eko Yulianto
Jurnal Teknik Sipil Vol 23, No 2 (2023): JURNAL TEKNIK SIPIL EDISI MEI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i2.62187

Abstract

Global climate change is expected to cause an increase in the intensity and duration of extreme rainfall events that occur today. The leading cause of flooding in various world regions, including flat coastal areas such as the Serok River catchment in Kota Pontianak, influenced by tides, is excessive rainfall. This article presents the results of an analysis of the impact of extreme precipitation on the peak discharge of flood hydrographs in the Serok River catchment, Kota Pontianak.Maximum daily rainfall data for 2009-2020 recorded at PTK-11 Pontianak Station were selected using the Annual Maximum Series Method. Frequency analysis was conducted using the best distribution method selected from Normal, Log Normal, Log Pearson Type III, and Gumbel Type I to obtain the design rainfall. The design rainfall was transformed into flood hydrographs at the next stage using the Snyder Synthetic Unit Hydrograph based on several return periods.The results of the analysis show that there are changes in flood discharge in the Serok River catchment area for each return period. The location of land use and the value of rain intensity significantly affect the calculation of plan discharge; the more significant the land area and the higher the rain intensity, the greater the resulting release. The most considerable flood discharge (Qmax) in the 2, 5, and 10 years return occurs at STA 1 + 100, w.290 m3/s, 0.347 m3/s, and 0.377 m3/s, respectively. Thus, this causes periodic flooding/inundation conditions, especially in areas that have low elevations.
MORPHOLOGY AND MORPHOMETRY CHARACTERISTIC OF RAYA WATERSHED Muhammad Yusril Ihza Kurzah; Nurhayati Nurhayati; Eko Yulianto
Jurnal Teknik Sipil Vol 24, No 1 (2024): Vol 24, No 1 (2024): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i1.75707

Abstract

The study of watershed morphology and land use patterns significantly affects hydrological processes and runoff coefficients, highlighting the quantitative nature of watershed characteristics. The Raya Watershed in West Kalimantan influences local communities and aims to enhance understanding of its physical attributes and hydrological dynamics through detailed analysis of topography, soil composition, land use, and river networks. Findings inform watershed management and conservation strategies. The analysis of the Raya Watershed, spanning 29,982.96 hectares (87.34% of total area) with elevations below 100 meters, reveals flat terrain vulnerable to flooding, particularly in low-lying or sea-level regions, exacerbated by limited natural drainage. Lower elevations support crucial wetland and floodplain ecosystems. Hydrological disruptions from land use changes and climate fluctuations can harm biodiversity and water quality. Effective land use planning is vital to address flood risk and environmental concerns, mitigating impacts like property damage and population displacement. Soil-type mapping informs conservation efforts, ensuring ecosystem resilience. Sustainable land management practices, guided by watershed characteristics like drain density and stream frequency, are essential to mitigate biodiversity loss and ecological imbalances.
DETERMINATION OF REPRESENTATIVE MOCK MODEL PARAMETERS FOR MONTHLY DISCHARGE CURVE DEVELOPMENT IN THE UPPER KAPUAS RIVER BASIN Mahardika Wira Aji Bayu Sutera; S. B. Soeryamassoeka; Eko Yulianto
Jurnal Teknik Sipil Vol 24, No 2 (2024): Vol 24, No 2 (2024): JURNAL TEKNIK SIPIL EDISI MEI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i2.69008

Abstract

Representative Mock Model Parameters for Generating Monthly Discharge Curves in the Upper Kapuas River Basin provide valuable insights into hydrological processes influenced by climatic factors. Potential evapotranspiration peaks in August due to elevated temperatures and intensified sunshine during the 2005 dry season, leading to increased water demand from soil and vegetation. This results in heightened water loss to the atmosphere, reducing available water for river flow and decreasing monthly discharge, which is crucial during dry periods. Effective water resource management strategies are essential to mitigate potential water scarcity. High rainfall in the upstream Kapuas watershed significantly impacts monthly discharge, with increased surface flow directly boosting river discharge. The monthly discharge varies widely between rainy and dry seasons, notably rising during heavy rainfall, potentially causing flooding. Effective watershed management, including runoff management, reforestation, and infrastructure development, is critical to mitigate these impacts and optimize water resources for irrigation and supply, ensuring efficient utilization of increased rainfall. Correlation and RSR test results underscore the model's ability to capture variable relationships and predict outcomes accurately. Strong correlations between 0.8 to 1 and RSR values ranging from 0.5 to 0.7 demonstrate the model's reliability in various scenarios. Models with lower RSR values below 0.5 exhibit exceptional prediction accuracy, emphasizing their utility in diverse applications. These findings highlight the importance of refining models to enhance accuracy and reliability in predictive hydrological applications within the Upper Kapuas River Basin, ensuring adequate water resource management and flood risk mitigation.
ANALYSIS OF WATER AVAILABILITY OF MADI IRRIGATION NETWORK Permada Garah Pradanapa; S. B. Soeryamassoeka; Eko Yulianto
Jurnal Teknik Sipil Vol 24, No 3 (2024): Vol 24, No 3 (2024): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i3.80389

Abstract

This research analyzes the water availability of the Madi Irrigation Network through detailed assessments of evapotranspiration and discharge data from 2008 to 2019. The study reveals significant seasonal and inter-annual variations in evapotranspiration rates, which typically increase during warmer months and decrease in cooler periods. This fluctuation is closely linked to climatic conditions, influencing agricultural water demand. Monthly discharge data further illustrates these variations, showing high discharge rates in the rainy season (e.g., January and December) and lower rates during drier periods (e.g., August and September). The 80% dependable discharge rates reflect similar seasonal trends, with notable peaks and troughs correlating with rainfall patterns. These insights underscore the importance of adaptive water management strategies to optimize irrigation practices, manage water resources effectively, and address the impacts of climate variability. By understanding these patterns, water managers can better plan for periods of surplus and scarcity, enhancing agricultural productivity and sustainability.
Co-Authors Herlianda Herlianda Mahardika Wira Aji Bayu Sutera Muhammad Yusril Ihza Kurzah Nurhayati Nurhayati Permada Garah Pradanapa Stefanus Barlian Soeryamassoeka