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All Journal Jurnal Teknik Sipil Nusantara Hasana Journal
Abd Rakhim Nanda
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Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Nursing

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KAJIAN PERENCANAAN BENDUNG BALIASE KABUPATEN LUWU UTARA PROVINSI SULAWESI SELATAN Abd Rakhim Nanda; Lutfi Hair Djunur; Nurul, Nurul Mutmainnah; Zhafira Zalzabila
Jurnal Teknik Sipil Vol 8 No 2 (2024): Jurnal Gradasi Teknik Sipil - Desember 2024
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/gradasi.v8i2.1381

Abstract

Bendung berfungsi meninggikan muka air untuk mendapatkan tinggi terjun sehingga air dapat mengalir ke tempat yang dibutuhkan seperti irigasi dan keperluan air. Bendung Baliase memiliki 5 kecamatan dan membendung Sungai baliase dengan DAS 946.20 Km2. Penelitian ini bertujuan untuk Menganalisis dimensi hidrolis tubuh bendung Baliase Kec. Masamba Kab. Luwu Utara dan mengidentifikasi perbandingan dimensi hidrolis terdahulu dengan dimensi hidrolis tinjauan di Baliase Kec. Masamba Kab. Luwu Utara. Metode yang digunakan berdasarkan acuan dari KP 02 kriteria perencanaan bangunan utama. Dari hasil penelitian didapatkan hasil analisa hidrolis, struktur dan stabilitas bendung baliase dapat dinyatakan aman terhadap exentrisitas, guling, amblas dan gaya geser aman. Adapun hasil perbandingan yang dimaksud yaitu untuk dimensi terdahulu menghitung debit banjir menggunakan metode Gumbel dengan hasil sebesar 1111,10 m3/det, elevasi deckzerk +48,30 m, elevasi mercu +43,50 m, elevasi lantai depan + 39,50 m, panjang lantai depan 23 m, dan elevasi kolam olak +34,57 m. Sedangkan untuk dimensi hidrolis baru debit banjir rancangan dihitung menggunakan metode Nakayasu dengan hasil sebesar 1149,88 m3/det, elevasi deckzerk +49,54 m, elevasi mercu +48,14 m, elevasi lantai depan +40,50 m, panjang lantai depan 21,2 m, dan elevasi kolam olak +36,06 m
HYDROLOGICAL EXTREMES AND WATER ALLOCATION IN TROPICAL RIVER BASINS: EVIDENCE FROM THE JENEBERANG RIVER, MAKASSAR Abd Rakhim Nanda
Nusantara Hasana Journal Vol. 3 No. 7 (2023): Nusantara Hasana Journal, December 2023
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v3i7.2031

Abstract

This study proposes an adaptive water allocation framework based on the pipeline P(t)→SPI(t)→A(t), with SPI serving as a control variable to represent hydrological conditions probabilistically. Analysis shows that rainfall is non-stationary and dominated by stochastic variability, making a mean-based approach unrepresentative. Integrating SPI enables dynamic adjustment of allocations to actual conditions, reducing the deficit by 12.96% and increasing efficiency from 46.32% to 53.49%. Validation of the dataset shows high consistency with the presence of systematic scale bias, making it more suitable for anomaly-based analysis. Sensitivity analysis identifies bounded responsiveness, where the system is adaptive under normal conditions but remains stable under extreme conditions. Conceptually, this study transforms the SPI into a decision variable, thereby establishing a causal relationship between hydroclimatic variability and allocation decisions and enhancing the system’s resilience to drought risk.
QUANTIFYING RAINFALL - EVAPOTRANSPIRATION IMBALANCE AND IRRIGATION WATER DEFICIT IN THE BANTIMURUNG IRRIGATION AREA, MAROS, INDONESIA Abd Rakhim Nanda
Nusantara Hasana Journal Vol. 4 No. 1 (2024): Nusantara Hasana Journal, Juny 2024
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v4i1.2032

Abstract

This study quantifies irrigation water deficit in the Bantimurung Irrigation District (Maros, Indonesia) by integrating rainfall-evapotranspiration imbalance into a hydrological-agronomic water balance. Monthly rainfall (CHIRPS) and reference evapotranspiration (Open-Meteo) for 2000–2024 were combined with crop coefficients and a local planting calendar to estimate effective rainfall and net irrigation requirement (NIR). Despite cumulative rainfall of 81,077.6 mm exceeding crop evapotranspiration (34,450.6 mm; 2.35:1), deficits occurred in 96 of 300 months (32%), concentrated in July–October. Total NIR was ~9,044 mm (≈361.8 mm yr⁻¹), with 97.35% accruing in the dry season and peak demand in August–September. The maximum monthly deficit was 200.93 mm (September 2023) and the most severe year was 2015 (711.12 mm).
A SCENARIO-BASED HYDROLOGICAL SIMULATION FRAMEWORK FOR CLIMATE-RESILIENT IRRIGATION WATER ALLOCATION IN TROPICAL WATERSHEDS Abd Rakhim Nanda
Nusantara Hasana Journal Vol. 5 No. 5 (2025): Nusantara Hasana Journal, October 2025
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v5i5.2033

Abstract

Rainfall variability and climate uncertainty increasingly affect irrigation water availability in tropical watersheds. This study develops a scenario-based hydrological simulation framework for climate-resilient irrigation water allocation. The framework integrates rainfall scenario development, runoff estimation, evapotranspiration-based crop water requirement, water availability assessment, and monthly water balance analysis. Five rainfall scenarios were simulated, consisting of normal rainfall, moderate rainfall deficit, severe drought, extreme drought, and extreme rainfall conditions. The results show that reduced rainfall substantially decreases water availability and increases irrigation deficit during the dry season. Irrigation reliability declined from 75% under normal conditions to 60%, 42%, and 25% under moderate, severe, and extreme drought scenarios, respectively. In contrast, the extreme rainfall scenario increased reliability to 85%, although it may intensify runoff and flood risk. The proposed framework supports adaptive irrigation scheduling, crop calendar adjustment, storage optimization, and climate-resilient water allocation planning.
RAINFALL–RUNOFF SIMULATION FOR SUSTAINABLE IRRIGATION WATER MANAGEMENT IN TROPICAL AGRICULTURAL CATCHMENT Abd Rakhim Nanda
Nusantara Hasana Journal Vol. 5 No. 11 (2026): Nusantara Hasana Journal, April 2026
Publisher : Yayasan Nusantara Hasana Berdikari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59003/nhj.v5i11.2034

Abstract

Rainfall–runoff processes play a crucial role in determining irrigation water availability in tropical agricultural catchments. This study develops a rainfall–runoff simulation framework for sustainable irrigation water management by integrating rainfall characterization, SCS-CN runoff estimation, runoff coefficient analysis, effective runoff availability, irrigation water demand, water balance, Surplus–Deficit Ratio, and Irrigation Sustainability Index. Monthly rainfall data were used to estimate runoff depth and runoff-derived water availability, while irrigation demand was evaluated based on crop water requirement and effective water availability. The results show that runoff generation is highly seasonal, with high runoff coefficients during wet months and low runoff response during dry months. The ISI results indicate highly sustainable irrigation conditions in January, February, and December, sustainable conditions in March and November, and critical conditions from June to September. The proposed framework supports runoff harvesting, storage optimization, rotational irrigation, crop calendar adjustment, and priority-based water allocation.
Co-Authors Lutfi Hair Djunur Nurul, Nurul Mutmainnah Zhafira Zalzabila