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All Journal Jurnal Ilmu Lingkungan Cannarium (Jurnal Ilmu-ilmu Pertanian) MAKILA: Jurnal Penelitian Kehutanan
SARIF ROBO
Prodi Ilmu Tanah, Universitas Khairun, Ternate, Maluku Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Social Sciences

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Analisis Ketidakpastian Parameterisasi Penggunaan Lahan dalam Model Invest Water Yield: Tinjauan Sistematis DAS Tropis SARIF ROBO
Cannarium Vol 24 No 1 (2026): 24(1)
Publisher : Universitas Khairun

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Abstract

Land use change (LULC) and climate variability are key factors influencing water availability in watersheds, particularly in tropical regions. The InVEST water yield model has been widely applied to assess water-related ecosystem services; however, it still faces significant challenges related to LULC parameter uncertainty. This study aims to identify patterns of LULC parameterization, analyze the relationship between land use change and water yield, and evaluate sources of uncertainty in the InVEST model. A systematic literature review (SLR) was conducted on 43 peer-reviewed articles indexed in Scopus and Web of Science (Q1–Q2) published between 2015 and 2026. The analysis focused on key biophysical parameters, including crop coefficient (Kc), root depth, plant available water content (PAWC), and the Z parameter, as well as model validation practices. The results indicate that precipitation is the primary driver of water yield, while LULC acts as a spatial modifier through evapotranspiration and infiltration processes. Land use changes such as deforestation and urbanization generally increase water yield, whereas forest cover tends to reduce it due to higher evapotranspiration rates. The variation of LULC parameters across studies reveals substantial inconsistency, representing the main source of model uncertainty. This uncertainty propagates through hydrological processes and significantly affects water yield estimation. Moreover, limited model validation indicates that many results remain conceptual rather than empirically verified. This study concludes that LULC parameterization is a critical factor determining the uncertainty level of the InVEST model. Therefore, locally calibrated parameterization approaches and improved empirical validation are essential to enhance model reliability, particularly in tropical watersheds
Integrasi Variabilitas Curah Hujan dan Perubahan Penggunaan Lahan untuk Pemetaan Potensi Banjir dan Banjir Bandang di Kabupaten Bireuen, Aceh Safrizal Safrizal; Cut Azizah; Abdul Malik; Sarif Robo; Misnawati Misnawati
Jurnal Ilmu Lingkungan Vol 24, No 4 (2026): July 2026
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.24.4.891-899

Abstract

Banjir dan banjir bandang merupakan bencana hidrometeorologi yang berulang di Kabupaten Bireuen, Aceh, yang dipengaruhi oleh variabilitas curah hujan, perubahan penggunaan lahan, dan kondisi biofisik wilayah. Penelitian ini bertujuan menganalisis variabilitas curah hujan dan perubahan penggunaan lahan serta memetakan potensi banjir dan banjir bandang di Kabupaten Bireuen. Variabilitas curah hujan dianalisis menggunakan data CHIRPS periode 1981–2024 melalui pola tahunan, musiman, dan Antecedent Precipitation Index lima hari (API5) sebagai indikator kondisi basah sebelum kejadian. Perubahan penggunaan lahan dianalisis dengan membandingkan data tahun 1990 dan hasil klasifikasi citra Landsat 9 OLI 2 tahun 2025. Analisis spasial mengintegrasikan perubahan penggunaan lahan dengan Hydrologic Soil Group (HSG), Curve Number (CN), serta Flash Flood Potential Index (FFPI) untuk menggambarkan potensi banjir dan banjir bandang. Hasil menunjukkan bahwa curah hujan di Bireuen memiliki pola ekuatorial dengan dua puncak hujan pada Maret–April dan November–Desember, sedangkan API5 tinggi pada tahun 2020 berasosiasi dengan kejadian banjir besar pada tahun yang sama. Perubahan penggunaan lahan menunjukkan berkurangnya hutan dan semak belukar disertai peningkatan perkebunan dan permukiman selama periode 1990 2025. Sekitar 90,6% wilayah didominasi HSG C dan D yang memiliki kemampuan infiltrasi rendah hingga sangat rendah, sementara 54,7% wilayah berada pada kategori CN tinggi. Hasil FFPI menunjukkan bahwa 63,0% wilayah berada pada kategori potensi banjir bandang sedang dan 27,5% pada kategori tinggi, dengan variasi yang jelas antarkecamatan. Pola spasial tersebut menunjukkan bahwa potensi banjir dan banjir bandang di Kabupaten Bireuen berkaitan dengan kombinasi kondisi hidrometeorologi, penggunaan lahan, karakteristik tanah, dan fisiografi wilayah, sehingga pemetaan potensi dapat mendukung perencanaan tata ruang dan penentuan wilayah prioritas mitigasi.
Jejak Pedogenesis Awal pada Inceptisol Berkembang Material Vulkanik Pulau Makian Maluku Utara Erwin Ladjinga; Lily Ishak; Sarif Robo; Gunawan Hartono; Iswandi Kadir
MAKILA Vol 20 No 2 (2026): Makila: Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v20i2.25376

Abstract

Volcanic island soils provide a strategic setting for examining how early pedogenic signatures emerge before diagnostic horizons are fully expressed. This study evaluates the relationship between chemical development and morphological differentiation in Inceptisols developed from volcanic parent materials on Makian Island, North Maluku, Indonesia. Two representative profiles were selected within relatively homogeneous volcanic land units but different topographic positions. Morphological properties were described using standard soil survey procedures, while texture, bulk density, porosity, infiltration rate, C-organic, C/N ratio, and cation exchange capacity (CEC) were analyzed by horizon. Linear regression and principal component analysis were applied as exploratory tools to assess intervariable patterns. The results show weak horizon differentiation (A-B-C), limited structural development, coarse texture, moderate bulk density (1.25-1.40 g cm⁻³), high porosity (47-51%), and moderate to rapid infiltration (20-40 mm h⁻¹), indicating strong parent-material control over physical properties. Chemical properties showed clearer vertical gradients, with higher C-organic content (up to 2.44%) and CEC (up to 21.95 cmol(+) kg⁻¹) in surface horizons. C-organic and CEC had moderate linear relationships in Profile I (R² = 0.56) and Profile II (R² = 0.55), whereas other relationships were weak or inconsistent. These findings indicate pedogenic decoupling, where chemical functions develop earlier than clear morphological differentiation. The study strengthens the concept that early pedogenesis in humid tropical volcanic islands may proceed through asynchronous organo-mineral and biological processes.
Co-Authors Abdul Malik Cut Azizah Gunawan Hartono Ishak, Lily Iswandi Kadir Ladjinga, Erwin Misnawati Misnawati Safrizal Safrizal