Hydrological Assessment and Irrigation Water Optimization Based on Cropping Patterns in the Way Bungur Irrigation Area, Indonesia

Restika Putri; Frida Yassar Maula; Muhammad Rizki Arif; Ikhsan Maulidi; Vina Apriliani

doi:10.58524/ijhes.v4i3.926

Authors

Restika Putri Departement of Biosystems Engineering, Institut Teknologi Sumatera
Frida Yassar Maula Departement of Biosystems Engineering, Institut Teknologi Sumatera
Muhammad Rizki Arif Departement of Railway Engineering, Institut Teknologi Sumatera
Ikhsan Maulidi Mathematics and Physical Sciences, Kanazawa University http://orcid.org/0000-0002-6841-9639
Vina Apriliani Mathematics and Physical Sciences, Kanazawa University

DOI:

https://doi.org/10.58524/ijhes.v4i3.926

Keywords:

cropping pattern planning, hydrological modeling, irrigation water requirements, water balance analysis, way bungur watershed

Abstract

Efficient water management is essential for sustaining agricultural productivity, particularly in regions supported by technical irrigation systems such as the Way Bungur Irrigation Area in Pringsewu Regency, Indonesia. Although water availability in this region is generally adequate, its utilization remains inefficient due to cropping schedules that are not aligned with seasonal hydrological conditions, especially during the dry season. This study evaluates irrigation water requirements based on crop types and the official Cropping Pattern Plan (SK RTT), and compares them with water availability estimated using the F.J. Mock hydrological model. Input data include rainfall records, climatological parameters, river discharge, and field measurements. Crop water requirements were calculated using the FAO Penman–Monteith method, while water availability was assessed through dependable flow analysis. Results indicate that water availability in the Way Bungur watershed generally exceeds irrigation demand across three cropping seasons. However, temporal mismatches between planting schedules and water surplus or deficit periods lead to suboptimal water use. These findings highlight the importance of integrating annual water balance analysis into cropping pattern planning to enhance allocation efficiency, reduce risk, and promote sustainable agricultural development.

Author Biographies

Ikhsan Maulidi, Mathematics and Physical Sciences, Kanazawa University

Departement of Mathematics, Universitas Syiah Kuala, INDONESIA
Vina Apriliani, Mathematics and Physical Sciences, Kanazawa University

Departement of Mathematics Education, Universitas Islam Negeri Ar-Raniry Banda Aceh, INDONESIA

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