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All Journal Indonesian Journal of Geography Ecotrophic, Journal of Environmental Science Media Komunikasi Geografi Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Majalah Geografi Indonesia Journal of Degraded and Mining Lands Management Forum Geografi GEA, Jurnal Pendidikan Geografi Syntax Literate: Jurnal Ilmiah Indonesia JURNAL SWARNABHUMI J SIG (Jurnal Sains Informasi Geografi) JURNAL GEOGRAFI Geografi dan Pengajarannya Jurnal Aplikasi dan Inovasi Iptek (JASINTEK) Geosfera Indonesia
Slamet Suprayogi
Departemen Geografi Lingkungan, Fakultas Geografi, Universitas Gadjah Mada, Yogyakarta 55281
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Law, Crime, Criminology & Criminal Justice Physics Social Sciences Other

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Assessing farmers' soil conservation adoption across erosion hazard zones in Juwet Sub-Watershed, Indonesia Hidayah, Nurul; Hizbaron, Dyah Rahmawati; Suprayogi, Slamet
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.11021

Abstract

Soil erosion is a critical environmental problem threatening agricultural productivity and watershed sustainability in tropical developing countries. Despite growing interest in conservation adoption, empirical studies explicitly linking erosion hazard zonation with farmers' social conservation behavior at the micro sub-watershed scale remain scarce. This study examined soil conservation knowledge, attitudes, and practices among 110 farmers across five Erosion Hazard Level (EHL) zones in the Juwet Sub-Watershed, Special Region of Yogyakarta, Indonesia, using an integrated biophysical–social approach grounded in the Knowledge–Attitude–Practice (KAP) framework complemented by the Theory of Planned Behavior. The EHL map was derived by crossing erosion potential data with soil depth measurements and served as the spatial framework for stratified sampling. The results revealed a consistent knowledge–practice gap across all EHL zones: farmers demonstrated relatively high erosion awareness and positive perceptions of conservation effectiveness, yet actual practice remained uniformly moderate regardless of hazard level. The very high EHL zone, covering 69.7% of the sub-watershed, had the weakest institutional support, with only 24.6% of farmers actively discussing conservation issues. Financial constraints and extreme weather were the primary barriers, while limited knowledge ranked least significant. These findings confirm that the principal bottleneck is structural and economic rather than cognitive, underscoring the need for zone-differentiated conservation interventions grounded in participatory watershed development principles.
A New Algorithm For The Grid Cell-Based Runoff Routing Model Based on Travel Time Concept Afkril, Baina; Hadi, M. Pramono; Suprayogi, Slamet
Geosfera Indonesia Vol. 5 No. 2 (2020): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v5i2.17351

Abstract

The grid cell-based routing model has recently been used to simulate direct runoff hydrographs at catchment scales. This study develops a flexible event-based runoff routing algorithm to simulate a direct runoff hydrograph (DRH). The experiment was based on the spatiotemporal inputs of a hydrological data set. The flexibility is based on the time step and grid cell size applied in the original STORE-DHM. Rainfall distribution was obtained using radar data adjusted by the measured point ground, while the runoff yield was determined using the NRCS-CN method. The parameter distribution was captured in the GIS environment as raster data formats. Furthermore, it was converted into ASCII data formats for scripting the routing algorithm using Matlab programming codes. The model algorithm was tested for storm events within two small study river systems in Yogyakarta, Indonesia. One event in each catchment was selected and calibrated to the observed hydrograph, treating the Curve Number (CN) and Manning coefficient (n) values as parameter calibrations. In the end, two events were selected for validation. The proposed routing model algorithm simulates DRHs of all selected events in the study areas with excellent performance. The Nash-Sutcliffe coefficient was greater than 0.75 for all DRH during validation, and the volume bias and peak discharge error were less than 25%. Keywords: Algorithm; Cell-based runoff routing; Travel time; GIS; Direct runoff hydrograph. Copyright (c) 2020 Geosfera Indonesia Journal and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License
Co-Authors Afkril, Baina agung Suryanto Alvia, Sakila Andung Bayu Sekaranom Andy Wibawa Nurrohman Aris Sutardi Arno, Giarno Azura Ulfa, Azura Bokiraiya Latuamury Budi Indra Setiawan Chaidir, Taufiq Christanto, Nugroho Dwi Agustina Edhy Martono, Edhy Eko Ali Saputro Eko Sugiharto Evi Mivtahul Khoirullah, Evi Mivtahul Fadilah, Gita Oktaviani Fadlillah, Lintang Nur Fatchurohman, Hendy Forita Dyah Arianti, Forita Dyah Giarno Giarno Hadi, Mohammad Pramono Hajar, St. Hanan, Nasril Hendriawan, Rizki Hermantoro . Hermawan, Sekar Gading Hidayah, Kuny Hizbaron, Dyah Rahmawati Ig. L. Setyawan Purnama Iman, Atifatul Imroatush shoolikhah Irfani, Febriana Iwuk Sri Lestari Izzati, Amaeliya Julianti Marbun La Musa M Pramono Hadi, M Pramono M Widyastuti M. Widyastuti Margaretha Widiyastuti Margaretha Widyastuti Mohammad Pramono Hadi Mohammad Pramono Hadi Muhammad Faris, Muhammad Muhammad Ngainul Malawani Muhammad Pramono Hadi, Muhammad Pramono Musafir Ningsih, Shinta Wahyu Nunik Cokrowati Nur Aziz Widodo NURUL HIDAYAH Oktaviani, Tannia Rosali Prihantarto, Wikan Jaya Rafif, M. Roid Al Rahmawati, Laelina Ramadhani, Endi Raras Endarto Rudiyanto Rudiyanto Saputro, Eko Ali Sa’ban, M. Iman Nichfu Setiawan, Bagus Arif Setyawan Purnama Setyawan Purnama Sigit Heru Murti Sofia Wantasen Soliyanti Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Suhdi, Suhdi Suhendri, Salwa Suratman Suratman Suroso Suroso Suroso Tivianton, Tommy Andryan Tjahyo Nugroho Adji Totok Gunawan Totok Gunawan Totok Gunawan Totok Gunawan Totok Gunawan Widayati Indarsih Widyastuti Widyastuti Zohri, M.