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Rofiqul Umam
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International Journal of Hydrological and Environmental for Sustainability
Published by Foundation of Advanced Education
ISSN : 28286405     EISSN : 28285050     DOI : -
Core Subject : Science, Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Environmental Science
Journal Overview International Journal of Hydrological and Environmental for Sustainability (IJHES) [e-ISSN: 2828-5050] is an internationally recognised peer-reviewed journal for the dissemination of innovations and solutions focused on enhancing water and Environment management best practice. The journal provides a conduit between academics and practitioners. We therefore particularly encourage contributions focussed at the interface between academia and industry, which deliver industrially impactful applied research underpinned by scientific evidence. We are keen to attract papers on a broad range of subjects including water and wastewater treatment, water and air polluted, water and environmental engineering, Environmentally Friendly Architectural Engineering (Green Building) and much more. Since 2022, IJHES issues 3 times a year (February, June, and October). Please click here for more information Reasons to Publish - Publish your work in International Journal of Hydrological and Environmental for Sustainability (IJHES) is ISI listed demonstrating that your paper will be published alongside high quality, impactful research - The journals focus and scope means you will reach both the research and practitioner communities, Water and Environment Journal showcases innovative and integrated approaches to all aspects of environmental management, with a global perspective - The journal welcomes papers on a broad range of topics including all aspects of water processing and engineering, the water cycle, air pollution, waste management, and environmental conservation - Your paper will reach professionals working in academia, consultancies, Governments, regulators, NGOs and the environment sector International Journal of Hydrological and Environmental for Sustainability (IJHES) is keen to attract papers on a broad range of subjects including: - Water and waste water management - Applied science and technology for environment and sustainable energy - Geophysics and geochemistry - Environmental technology - Water and environmental engineering - Environmentally Friendly Architectural Engineering - Geothermal system - Biotechnology and Biomaterials for Sustainability - Air quality and climate change
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)
Articles 78 Documents
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B-Li-Cl Trend Line Can Distinguish The Dominance of Hydrothermal Water and Surface Water: A Case Study of Geothermal in Tengchong, Southwestern China Feng-Yun Huang; Shakal Khan Korai
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 1 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i1.636

Abstract

The Boron-Lithium-Chlorine (B-Li-Cl) trend line serves as a valuable geochemical tool for distinguishing the dominance of hydrothermal water and surface water in geothermal environments. In this study, we applied the B-Li-Cl trend line to analyze the geochemical characteristics of water samples from the Tengchong geothermal area in Southwestern China. Our results reveal distinct patterns that differentiate hydrothermal water from surface water, offering insights into the geochemical processes and interactions occurring in this region. The lower Cl/Li and Cl/B ratio values of meteoric water with a Cl concentration of <10 (mg/L) indicate that mixing occurs not only when migrating upwards, but also inwards. The absence of a trend formed at a Cl concentration of <10 (mg/L) proves that the Cl concentration can be diluted by mixing with meteoric water. Meanwhile, the concentrations of Li > 100 (µg/L) and B > 1 (mg/L) form a downward trend from magmatic water, while the concentration of B < 1 (mg/L) has a downward trend from meteoric water. Both interpretations confirm that the behaviour of Lithium and Boron towards temperature changes has the same tendency, which can illustrate the origin of hydrothermal water formation.
Water Balance Analysis for Irrigation Sustainability in the Way Kelutum Irrigation Area Restika Putri; Dyah Indriana Kusumastuti; Frida Yassar Maula
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 1 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i1.932

Abstract

The sustainability of irrigated agriculture in regions with pronounced seasonal rainfall variability depends on maintaining a balance between water availability and crop water demand. This study evaluates the irrigation water balance in the Way Kelutum Irrigation Area, Pringsewu Regency, Lampung, Indonesia, through a semi-monthly analysis integrating crop water requirements and dependable river discharge. Crop water demand was estimated using the Penman–Monteith method, while dependable discharge at an 80% reliability level was calculated using the F.J. Mock model based on rainfall, climatological data, and watershed characteristics. The results indicate that effective rainfall contributes substantially to meeting crop water requirements during the early rainy season, whereas irrigation supply becomes the primary source of water during the dry season. The dependable discharge of the Way Kelutum River varies between 0.10 and 1.40 m³/s throughout the year. Semi monthly water balance analysis shows that available water resources are sufficient to support two rice-growing seasons over an irrigated area of 42.04 ha, while water deficits occur for secondary crops during the peak dry period. By emphasising intra-seasonal water balance dynamics rather than annual-scale averages, this study provides practical insights for determining operational cropping patterns in small-to-medium irrigation schemes, particularly under conditions of limited dry-season water availability.
Production and Characterization of Bioethanol from Tobacco Stalks via Acid Hydrolysis and Fermentation Akhmad Irfan; Adi Muslihat; Sunaryo; Sri Jumini; Ikrom Mustofa; Dhandhun Wacano; Raju; Amir Machmud; Endah Kinarya Palupi
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 1 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i1.1030

Abstract

The increasing demand for energy and the environmental impacts of fossil fuel consumption have encouraged the development of renewable and sustainable energy sources. Bioethanol derived from lignocellulosic biomass represents a promising alternative fuel due to its renewability and reduced competition with food resources. This study investigates the potential of tobacco stalks, an underutilized agricultural residue, as a feedstock for bioethanol production through acid hydrolysis and fermentation processes. Dried tobacco stalks were hydrolyzed using 1 M sulfuric acid at 110 °C for 3 h to produce fermentable sugars, followed by batch fermentation using Saccharomyces cerevisiae with variations in yeast concentration and fermentation time. The fermentation products were purified by simple distillation and characterized using refractometry, density measurement, GC–MS, and bomb calorimetry. The hydrolysis process yielded a sugar concentration of 7.6%. Refractometric analysis indicated ethanol concentrations in the range of 64–68% (v/v), while density measurements suggested lower effective ethanol purity due to residual water and non-ethanol components. GC–MS analysis confirmed ethanol as the dominant compound, with relative contents ranging from approximately 52% to 73%, accompanied by acetic acid and minor volatile by-products. The calorific value of the produced bioethanol ranged from 4,825 to 4,983 kcal/kg and increased with fermentation time. The results demonstrate that tobacco stalks have considerable potential as a lignocellulosic feedstock for bioethanol production, although further process optimization is required to enhance ethanol purity and overall conversion efficiency.
Lithological Controls on Acid Mine Drainage Formation: An Integrated Rock Characterization of AMD Sources in the Sungai Seluang Area, East Kalimantan, Indonesia Jamaluddin; Muhammad Syifaul Qulub; Nijusiho Manik; Emi Prasetyawati Umar; Hamriani Ryka; Efrina Chandra Agusti Putri
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 1 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i1.1061

Abstract

Acid Mine Drainage (AMD) represents a critical environmental challenge in coal-mining regions, particularly due to its long-term impacts on surface water quality and surrounding ecosystems. This study investigates the lithological controls on AMD formation in the Sungai Seluang area, East Kalimantan, Indonesia, through an integrated rock characterization approach. The novelty of this research lies in linking detailed lithological attributes and pyrite micro-morphology with AMD generation potential and its implications for riverine water systems. Macroscopic lithological observations were combined with standardized pH testing (SNI 6989.11:2019) and Scanning Electron Microscopy (SEM) to evaluate the acid-generation characteristics of representative rock units. The results indicate that 92% of the analyzed samples are classified as Potentially Acid Forming (PAF), while only 8% are Non-Acid Forming (NAF). The study area is lithologically dominated by claystone (42%), sandstone (31%), and shale (27%), all of which commonly exhibit intense oxidative staining, pervasive fracturing, and weathering features that significantly enhance sulfide exposure to oxygen and water. SEM analyses reveal the presence of both euhedral and framboidal pyrite, with framboidal pyrite identified as particularly reactive and influential in accelerating acid production. Measured pH values are predominantly acidic (<6), indicating a high AMD potential that poses a serious threat to the Sungai Seluang system through acidification and metal mobilization. These findings demonstrate that lithology and micro-scale mineralogical characteristics play a decisive role in controlling AMD formation and its environmental consequences. The integrated approach adopted in this study provides a robust framework for early AMD source identification and supports the development of more effective geochemical management strategies aimed at protecting water quality and minimizing long-term environmental degradation in coal-mining areas.
Environmental Sustainable Utilization of Agricultural Waste–Based Sterilization for White Oyster Mushroom Cultivation: An FTIR Study of Optical Vibrational Properties Irzaman; Erni Apriliana; Ridwan Siskandar; Heriyanto Syafutra; Renan Prasta Jenie; Marina Indriasari; Muhammad Mahyiddin Ramli; Nazopatul Patonah Har; Muammar Mohamad Isa
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 1 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i1.1005

Abstract

This study investigates the environmentally sustainable use of agricultural waste–based sterilization in white oyster mushroom (Pleurotus ostreatus) cultivation and its influence on mycelial optical vibrational properties. A small-scale industrial rice husk furnace was employed as an eco-friendly and low-cost sterilization system, providing an alternative to conventional fossil fuel–based energy sources. Potato Dextrose Agar (PDA) was used as the growth medium, while different sterilization levels were applied to obtain uncontaminated media and high-quality mycelial growth. Three sterilization levels were systematically analyzed using Fourier Transform Infrared (FTIR) spectroscopy to evaluate optical behavior at various cultivation stages. The optical properties of the mycelium were assessed through Longitudinal Optical (LO) and Transverse Optical (TO) vibrational modes derived from FTIR spectra. The results indicate that increasing the sterilization level leads to a consistent shift of both LO and TO modes toward higher wavenumbers, reflecting changes in molecular bonding and structural characteristics of the mycelium. Furthermore, longer boiling durations at 102 °C using the rice husk furnace resulted in higher transmittance values, attributed to the partial evaporation or reduction of certain organic compounds within the mycelium. Comparative analysis among cultivation stages shows that the planting spawn (F2) exhibits lower transmittance than the spreading spawn (F1), while the pure culture (F0) demonstrates the highest transmittance. These differences are closely related to variations in mycelial density, with F2 having the greatest mass per unit volume. Overall, the findings confirm that agricultural waste–based sterilization supports environmentally sustainable mushroom cultivation while significantly affecting the optical and structural properties of mycelium.
Hydrological Effects on Rock Mass Quality and Rippability of Heterogeneous Karstic Limestone Andy Erwin Wijaya; Partama Misdiyanta; Rizqi Prastowo; Yoshitaka Mitsui; Keodouangdy Yongthong; Berwyn Dzaky Radhitya
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 1 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i1.1122

Abstract

The proposed study area is located approximately 1.9 km southwest of the main cement plant in Tuban, Indonesia. This research aims to evaluate the rippability characteristics of the limestone formation underlying the planned development site. The assessment is based on data obtained from a geotechnical borehole investigation (CR-1), integrated with previous subsurface exploration results. The site is designated for shallow foundation systems designed to withstand bearing pressures ranging from 300 to 800 kPa. Subsurface conditions are characterized by karstic limestone with complex hydrogeological features. The limestone exhibits high sensitivity to water infiltration, dissolution processes, and mechanical property degradation under saturated conditions. Significant spatial variability in rock mass quality and strength is observed over relatively short vertical and horizontal distances. The uppermost layer comprises residual lateritic (red) soil derived from in-situ weathering of the underlying limestone. The presence of limestone gravels and boulders within the residual soil indicates a transitional interface between the overburden and the more competent limestone strata. The limestone formation consists of heterogeneous materials, including highly porous honeycomb-textured rock and relatively intact, sound limestone, distributed irregularly across the site. This heterogeneity results in considerable variability in mechanical strength and excavation response. The findings provide essential insights into the rippability behavior of the limestone and its implications for foundation design and construction planning in karst environments.
Evaluation of Microbiological Indicator Contamination (Escherichia coli) and Heavy Metal Levels in Edible Fish from Situ Bambon, Ciracas: A Health Risk Assessment Haerul Anwar; Nadirahillah; Faisal M Jasin; Bayu Achil Sadjab; Cornelia Victoria Anghel; Amir Machmud
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 2 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i2.1137

Abstract

Situ Bambon in Ciracas, East Jakarta, is utilized by the local community for daily activities ranging from recreation, angling, to net fishing. The community frequently utilizes the areas around the inlet, midstream, and outlet to catch fish. This study aims to evaluate the content of the microbiological indicator E. coli and heavy metal levels in edible fish from Situ Bambon Ciracas to obtain a comprehensive Health Risk Assessment. The results showed that the microbiological contamination levels through the Escherichia coli indicator in edible fish ranged from <1.8 to 13.9 MPN/g, indicating that fish samples in the inlet 1 and outlet 2 areas failed to meet food safety standards (< 3 APM/g). The worst concentrations of Cadmium (Cd) and Lead (Pb) in edible fish from Situ Bambon were found in the inlet 2 area, with a Cd value of 0.83 mg/kg and a Pb value of 0.80 mg/kg. The obtained Cd and Pb contamination levels exceeded the Maximum Contaminant Limits (MCL) established by PerBPOM Number 9 of 2022, where Cd was approximately 8.3 times higher, while Pb exceeded the limit by about 2.7 times. The Health Risk Assessment (HRA) indicated that the Hazard Index (HI) value of 1.489 exceeded the allowable tolerance threshold of 1.0. Risk contribution analysis showed that Cd accounted for 51.0% of the total HI risk, while Hg contributed 35.0%. Furthermore, the carcinogenic risk (cancer) was evaluated through the Total Risk (TR) for Cadmium (Cd) because it possesses the highest Slope Factor (SF) of 0.38 (mg/kg-day)⁻¹, calculated based on the Lifetime Average Daily Dose (LADD) and SF, yielding a result of 3.37 x 10⁻⁷. This value remains below the internationally acceptable carcinogenic risk threshold of TR < 10⁻⁶. The environment-fish-human exposure cycle in Situ Bambon has reached a hazardous threshold and demands top-priority intervention to protect public health.
Integrated HVSR Microtremor and Electrical Resistivity Analysis for Identifying Shallow Fluid Migration Pathways in Sangubanyu, Central Java, Indonesia Hartono Hartono; Oscar Kaeni; Jasuri
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 3 (2026): [Forthcoming Issue] International Journal of Hydrological and Environmental for
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i3.1175

Abstract

Surface manifestations of oil seepage and geothermal discharge indicate active subsurface fluid migration, but identifying shallow migration pathways in structurally complex volcanic terrains remains challenging using a single geophysical method. This study investigates shallow fluid migration in the Sangubanyi area, Central Java, Indonesia, through the integrated interpretation of Horizontal-to-Vertical Spectral Ratio (HVSR) microtremor measurements and Schlumberger resistivity sounding. HVSR-derived shear-wave velocity (Vs) models were integrated with resistivity-depth models to constrain subsurface layering and identify geophysical boundaries related to fluid migration. MSB-02 exhibits a dominant frequency of 1.32 Hz with an amplification factor of 4.32. The representative Vs model consists of a low-velocity layer of approximately 380 m/s extending to a depth of about 70 m, underlain by a higher-velocity layer of approximately 1900 m/s. Resistivity models reveal conductive zones of approximately 7–30 Ω·m contrasting with resistive volcanic units exceeding 500 Ω·m. The coincidence between the Vs impedance contrast and the resistivity anomaly is interpreted as a geophysical boundary associated with lithological variation and fault-related deformation. Integrated interpretation suggests that fault- and fracture-related permeability provides the principal vertical pathway for fluid ascent, whereas the more permeable Kaligetas Formation facilitates lateral fluid redistribution, explaining the close spatial association between hot spring manifestations and localized oil seepage. Based on the available near-surface geophysical evidence, the seepage is interpreted as a localized surface expression of structurally controlled shallow fluid migration rather than direct evidence of significant shallow hydrocarbon accumulation.
Mechanical Performance and Sustainability Potential of Concrete Incorporating Waste Polytetrafluoroethylene Fibers Lilis Zulaicha; Oggi Heicqal Ardian; Anggi Hermawan
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 2 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i2.1242

Abstract

This study investigates the feasibility of utilizing waste polytetrafluoroethylene (PTFE) fibers as a recycled additive in concrete to support plastic waste valorization and sustainable construction material development. Waste PTFE fibers obtained from industrial seal production were mechanically processed into irregular fiber-like particles with sizes of approximately 4–6 mm and incorporated into concrete mixtures at 0.2%, 0.4%, 0.6%, and 0.8% by weight of concrete. The effects of PTFE fiber addition on workability, splitting tensile strength, and flexural strength were evaluated using cylindrical and beam specimens tested according to SNI and ASTM standards. The results show that increasing PTFE fiber content reduced concrete workability, as indicated by a decrease in slump from 125 mm for the control mixture to 75 mm for the mixture containing 0.8% PTFE fibers. The incorporation of untreated PTFE fibers also decreased mechanical strength. Compared with the control concrete, splitting tensile strength decreased by 6.924%–18.474%, while flexural strength decreased by 15.409%–32.060%. This reduction is attributed to the smooth, hydrophobic, chemically inert, and low-friction surface characteristics of PTFE, which weaken adhesion between the fibers and the cementitious matrix and reduce load-transfer efficiency. Although untreated waste PTFE fibers did not improve the tensile-related mechanical performance of concrete, their use may contribute to plastic waste utilization in construction materials. Further surface treatment, fiber modification, and mix design optimization are required before waste PTFE fibers can be effectively applied as reinforcing materials in sustainable concrete.
Sustainable Water Infrastructure Assessment of Raw Water Availability and Demand in a Nickel Mining-Impacted Watershed: A Case Study of the Pali River, East Halmahera, Indonesia Hanie Teki Tjendani; Muliastuti; Sajiyo; Bambang Trigunarsyah; Buntara Sthenly Gan
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 2 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i2.1243

Abstract

Rapid regional development, population growth, and land-use conversion associated with nickel mining have intensified pressure on raw water resources in many tropical watersheds. In mining-affected regions, the sustainability of water infrastructure depends not only on projected demand but also on the long-term reliability of raw water availability under low-flow conditions. This study assesses raw water availability, future clean water demand, and watershed protection requirements for the Pali River, the main gravity-fed raw water source for Maba City, East Halmahera, Indonesia. A quantitative hydrological approach was applied by integrating population projection, water demand estimation, watershed delineation, rainfall–runoff analysis using the F.J. Mock water balance model, and mining-induced catchment reduction scenarios. Water demand was projected to 2045, while dependable discharge was evaluated using Q90 low-flow reliability. The results show that the projected average clean water demand for Maba City reaches 36.19 L/s in 2045. Under the baseline non-mining condition, the Pali River watershed has an effective catchment area of 1.75 km² and a Q90 dependable discharge of 17.19 L/s. This value is already insufficient to meet the projected average demand under critical dry-season conditions. Mining-related catchment contraction further reduces the effective watershed area to 0.733 km² under Scenario 1 and 0.2973 km² under Scenario 2, decreasing dependable discharge to 7.20 L/s and 2.92 L/s, respectively. These findings indicate that the Pali River alone cannot provide a reliable long-term raw water supply for Maba City. Protection of the entire contributing watershed, development of alternative raw water sources, additional storage infrastructure, and continuous water quality monitoring are therefore essential to support sustainable water infrastructure planning in this nickel mining-impacted watershed.

Page 7 of 8 | Total Record : 78

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