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Sustainable Urban Water International Seminar 2019, SUWIS 2019

作者： Nugraheni, Claudia Tyas Pawitan, Hidayat Purwanto, Yanuar Jarwadi Ridwansyah, Iwan Postgraduate Program in Natural Resources and Environmental Management IPB Bogor Indonesia Department of Geophysics and Meteorology IPB Bogor Indonesia Department of Civil and Environmental Engineering IPB Bogor Indonesia Limnology Research Center LIPI Bogor Indonesia

Bogor Regency is one of Regencies in Jabodetabek area that is experiencing rapid urban growth. This condition impacted the decreasing conditions of 39's from 95's urban small lakes or locally known as 'situ'. This research aims to analyze the effectiveness of situ Kebantenan and situ Cikaret as Ciliwung flood mitigation measure in the Bogor Regency. The SWAT model was employed for quantification the water balance of situ and watershed management. The simulation results of the water balance analysis indicated that the monthly average of volume of Situ Kabantenan and Situ Cikaret (2008-2015) were 136,955 m3 and 508,907 m3, the annual inflow Situ Cikaret were 24,693,822 m3/year and outflow were 25,177,593 m3/year, precipitation were 648,520 m3/year, evaporation were 166,543 m3/year, delta storage (1,794) m3/year, respectively. The result of hydrological responses analysis on application of situ and watershed management scenarios that combined the structural and non-structural measures was the best scenario for decreasing maximum discharge at situ outlet which is decreased 41% discharge. So that, in order to enhance the effectiveness of situs for Ciliwung flood mitigation, the combination of the structural and non structural management of 13 situ's in Ciliwung river basin within the Bogor Regency is recommended that can increase the storage capacity from 1.8 million m3 to 4.7 million m3. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Urban growth

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Monitoring of water quality and plankton composition in Porong Estuary, Sidoarjo

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AIP Conference Proceedings 2025年第1期3186卷

作者： Uun Yanuhar Muhammad Musa Heru Suryanto Nur Sakinah Junirahma Nico Rahman Caesar Aquatic Resources Management Faculty of Fisheries and Marine Sciences Brawijaya University Malang Jl. Veteran Malang 65145 Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Negeri Malang Malang 65145 Indonesia Master Program of Aquaculture Faculty of Fisheries and Marine Science University of Brawijaya Jl. Veteran Malang 65145 Indonesia Doctoral program of Environmental Science Postgraduate Program University of Brawijaya Jl. Veteran Malang 65145 Indonesia

Disposal of Lapindo mud which carries nutrients and other dissolved organic matter into the Porong estuary, can cause the death of aquatic organisms due to high contamination and disturbance of aquatic ecosystems. The presence of phytoplankton can explain the current condition of the Porong Estuary. The purpose of this study was to report the water quality and plankton composition of the Porong estuary. The method used in this study is a descriptive survey method. Determination of sampling points using the appropriate sampling method at three stations. The research variables observed included water quality parameters such as temperature, total dissolved solids (TDS), total suspended solids (TSS), total organic matter (TOM), pH, dissolved oxygen (DO), carbon dioxide (CO2), biological oxygen demand (BOD), nitrate, ammonia, orthophosphate, salinity and observations of phytoplankton in water bodies. The water quality values at stations 1, 2, and 3 respectively for TSS, pH, DO, BOD, TOM, nitrate, ammonia, orthophosphate shows a less than optimal value. Water conditions based on plankton abundance 24,678 cells/mL, 44,904 cells/mL, 18,312 cells/mL were eutrophic. The average of water quality parameters classified as less than optimal. Relatively, station 1 is the station with the best conditions between stations 2 and 3.

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A novel open-source framework for automatic flocculation kinetics and retention time modelling using image analysis and swarm intelligence

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Journal of Water Process engineering 2025年 74卷

作者： Bankole, Abayomi O. Moruzzi, Rodrigo Negri, Rogério G. Campos, Luiza C. Department of Civil and Environmental Engineering São Paulo State University (UNESP) Bauru Campus São Paulo Brazil Institute of Science and Technology São Paulo State University (UNESP) São Paulo São José dos Campos Brazil Department of Water Resources Management and Agrometeorology COLERM Federal University of Agriculture Abeokuta Nigeria Graduate Program in Natural Disasters (UNESP/CEMADEN) São Paulo São José dos Campos Brazil Centre for Urban Sustainability and Resilience Department of Civil Environmental and Geomatic Engineering University College London Gower Street London WC1E 6BT United Kingdom

Automatic detection of flocculation kinetic mechanisms and total hydraulic retention time (THRT) in multi-chamber systems in series is essential for seamless water treatment modelling. This study presents the first open-source tool for modelling flocculation kinetics and THRT in multi-chambers systems, with their sensitivity to image analysis. This study introduces three key novelties: (1) a non-derivative Secant method for simulating THRT, (2) use of Particle Swarm Optimization (PSO) algorithm to facilitate curve fitting technique for modelling flocculation kinetic coefficients, and (3) automatic retention time modelling directly from floc images, including sensitivity to threshold-based image segmentation. The proposed Secant method demonstrated greater robustness compared to the existing Newton-Raphson method (N-R), as it avoided convergence in cases where the N-R produced negative retention times. The PSO algorithm produced results comparable to the Bayesian approach, with aggregation coefficients of 2.773 × 10⁻⁴ and 1.905 × 10⁻⁴, and breakage coefficients of 1.186 × 10⁻⁶ and 2.656 × 10⁻⁶, at low and high velocity gradients (G), respectively. Flocculation kinetics at low G has steady aggregation followed by a dynamic equilibrium, while high G exhibited rapid formation of fragile flocs, followed by dominant breakage mechanism, and a later lower equilibrium. Scaled G for multi-chamber systems showed that reactor configurations with an immediate low G in the second chamber resulted in an average 50 % decrease in THRT. Finally, aggregation and breakage coefficients were sensitive to image segmentation thresholds, but THRT sensitivity is limited. The deployed model is accessible to improve flocculation modelling for multi-chambers in series (https://***). © 2025 Elsevier Ltd

关键词： Aggregation and breakage coefficients Completely stirred tank reactor Flocculation kinetics Intelligent water treatment monitoring System automation

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Dry-season sources of riverine sediment from the tropical mixed urban-agricultural watershed of the Mun River Basin in northeastern Thailand

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International Journal of Sediment Research 2023年第2期38卷 240-252页

作者： Arika Bridhikitti Thayukorn Prabamroong Gaohuan Liu Environmental Engineering and Disaster Management Program School of Interdisciplinary Studies Mahidol University Kanchanaburi Campus Earth Science Research Center Mahidol University Kanchanaburi Campus Faculty of Environment and Resource Studies Mahasarakham University State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences

Northeastern(NE) Thailand is well recognized as the land for rice cropping and consequently, it is potentially contaminated with chemicals from soil fertilization, pest/weed control, and urban *** Mun River basin in NE Thailand principally is comprised of rice paddies and sedimentation in the river has been pronounced, but the studies on sediment source identification are limited. The current study aims to identify sediment sources in the Mun River basin and discuss possible impacts on ecosystems attributed to exposure to polluted sediment. The assessment relies upon physicochemical properties and heavy metal contents(iron(Fe), manganese(Mn), copper(Cu), chromium(Cr), nickel(Ni),and Zinc(Zn)) in the fine-grained sediment(<63 μm) taken from the Mun River basin and the Chi River in the dry season of 2020-2021. The findings revealed that the heavy metals in the sediment had not accumulated to levels of concern. Most sediment was from natural sources, including Fe-and Mn-rich sediment, Cr-dominant sediment, and Ni-and Cu-rich sediment. Fe-and Zn-rich sediment was, however, found in the urban watershed of Lam Ta Klong, and it could originate from mixed urban sources. Ferich sediment was predominant in the Mun River basin, which and could be a significant sink and source of toxic elements from agricultural and urban discharges. It is suggested that the toxic compounds in the sediment should be consistently monitored, whereas ecological and health risk assessment should be focused on the mobile forms.

关键词： Sediment Heavy metals Mun River Lower Mekong River Agriculture

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Environmental quality and carrying capacity for restoration of estuarine mangrove ecosystem in the coral triangle ecoregion, Southeast Sulawesi, Indonesia

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International Journal of Environmental Studies 2024年第2期81卷 587-606页

作者： Rahim, Saban Marsuki Iswandi, R. Widayati, Weka Sharma, Sahadev Helmi, Muhammad Analuddin, Kangkuso Agriculture Science Doctoral Program Specialization in Natural Resources and Environmental Management Postgraduate Program Halu Oleo University Kendari Indonesia Department of Geography Faculty of Earth Science and Technology Halu Oleo University Kendari Indonesia Department of Agribusiness Faculty of Agriculture Universitas Halu Oleo Kendari Indonesia Institute of Ocean and Earth Sciences Universiti Malaya Malaysia Department of Oceanography Faculty of Fisheries and Marine Sciences Diponegoro University Semarang Indonesia Department of Biotechnology and Biology Faculty of Mathematics and Natural Sciences Halu Oleo University Kendari Indonesia Postgraduate Program Halu Oleo University Kendari Indonesia

The present study determines the environmental quality and carrying capacity for the restoration of the degraded mangroves in Southeast Sulawesi. The physico-chemical conditions of estuarine water and its sediment nutrient contents were determined in both protected and unprotected areas, with no significant difference (p > 0.05) except for nitrogen and inorganic carbon contents of water. The current study found promising environments for the restoration of degraded mangroves in unprotected areas in Southeast Sulawesi. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Restoration

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Real Time Monitoring System of Drinking Water Quality Using Internet of Things 24

Real Time Monitoring System of Drinking Water Quality Using ...

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24th International Electronics Symposium, IES 2022

作者： Abidin, Zainul Maulana, Eka Nurrohman, Muhammad Yogi Wardana, Fitri Candra Warsito Universitas Brawijaya Faculty of Computer Science Department of Computer Engineering Malang Indonesia Universitas Brawijaya Faculty of Engineering Department of Electrical Engineering Malang Indonesia Universitas Brawijaya Master Program in Environmental Resources and Development Management Postgraduate School Malang Indonesia Universitas Brawijaya Faculty of Mathematics and Natural Sciences Department of Chemistry Malang Indonesia

ISBN: (数字)9781665489713

ISBN: (纸本)9781665489713

In order to reduce Polyethylene Terephthalate (PET) bottle plastic waste, Universitas Brawijaya (UB) provided reverse osmosis drinking water in some buildings. Water monitoring is needed to keep the water quality. Therefore, a water monitoring system based on Total Dissolved Solids (TDS), pH, and water flow was proposed. Since the UB buildings have good internet connection (WiFi), Internet of Things (IoT) was employed to the system to support real time monitoring. So, data of TDS, pH, and water flow can be periodically sent to cloud and displayed to a specific website. The system worked very well and the data can be summarized and used by operator as indicators of performance of the reverse osmosis machine. When water quality and performance decrease, operator must check filters membrane or water pump for further maintenance to support long life use. Although the sensors have been calibrated properly, some measurement errors occur. The measurement error percentages of TDS and pH are 0.62% and 0.94%, respectively. © 2022 IEEE.

关键词： Internet of things

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Artificial neural networks for the prediction of channel geomorphic condition and stream sensitivity

Artificial neural networks for the prediction of channel geo...

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作者： Besaw, Lance Rizzo, Donna M. Kline, Michael University of Vermont College of Engineering and Mathematical Sciences Burlington VT 05405 United States Vermont Agency of Natural Resources River Management Program Waterbury VT 05671 United States

ISBN: (纸本)9780784409275

Stream channel and watershed management requires an interdisciplinary approach by multiple stakeholders with often disparate goals and objectives. Even single management goals (e.g. mitigation of property loss due to stream bank erosion and flooding, restoring stream channels and aquatic species habitat) require solutions that span multiple spatial and temporal scales. To deal with the complexity associated with goals such as reducing fluvial erosion hazards, sediment and nutrient loading and threats to aquatic habitat associated with geomorphic instability, the Vermont Agency of natural resources' River management program has been developing and testing 1) protocols for conducting field-based and remote sensing data and 2) a geographical information system (GIS)-based tool since 1999. These protocols and tools facilitate an understanding of channel instability and assist in developing strategies at appropriate scales to restore channel equilibrium. A hierarchical system of data-driven artificial neural networks (ANNs) has been developed to enhance these existing GIS-based watershed management tools for predicting channel geomorphic condition and inherent sensitivity at the reach scale. We research and develop these ANNs as an alternative model that can incorporate large amounts of data for use in the operational management of watersheds. The ANNs have been trained and tested on remotely sensed and in-field data along with corresponding expert opinions of geomorphic condition and sensitivity. The focus is performing sensitivity analyses and addressing inadequacies associated with assimilation activities that are closely tied to large amounts of hydrological-relevant remote sensing and field data. © 2007 ASCE.

关键词： Watersheds

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Leading sector analysis in West Kotawaringin Regency, Central Kalimantan Province, Indonesia 1

Leading sector analysis in West Kotawaringin Regency, Centra...

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1st International Seminar on natural resources and Environmental management 2019, ISeNREM 2019

作者： Sutrisna, M.G. Sitorus, S.R.P. Widiatmaka Marimin Nurwajedi Natural Resources and Environmental Management Program Study Postgraduate School IPB University Bogor Indonesia Dept. of Soil Science and Land Resources IPB University Bogor Indonesia Dept. of Agricultural Industral Technology IPB University Bogor Indonesia Geospatial Information Agency Cibinong Indonesia

The balance between economic, social, and environmental aspects should be fulfilled in the planning of sustainable regional development. The main engine of regional economic development is the leading sector, which is characterized by strong linkage between forward and backward sectors. This research is intended to analyze leading sectors in West Kotawaringin Regency, Central Kalimantan Province. The data used is the 2012 IO (Input-output) table, analysed using the Input-Output analysis method. Result of the research indicates that the leading sectors of West Kotawaringin Regency are agriculture;transportation and communication;trade, hotel and restaurant;and processing industry. As for the 48 sector groups, for the agricultural sector are rubber, wood, and oil palm;transportation and communication sector are river, lake and harbor transportation, sea transportation, and air transportation;trade, hotel, and restaurant sector is hotels and restaurants followed by trade. The manufacturing sector is the processing and preservation, the building wood and the sawmill industry. © Published under licence by IOP Publishing Ltd.

关键词： Commerce

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Restoring complex vegetation in urban settings: The case of tidal freshwater marshes

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Urban Ecosystems 2004年第2期7卷 125-137页

作者： Baldwin, Andrew H. Natural Resources Management Program Department of Biological Resources Engineering 1423 Animal Science Building University of Maryland College Park USA.

Tidal freshwater marshes have diverse plant communities that vary spatially and temporally due to hydrology, animal activity, and other factors. Development of urban centers along rivers of the U.S. Atlantic coast has reduced the historic extent and quality of these and other coastal wetlands. Because the vegetation of these wetlands is more complex than that of salt and brackish marshes (where restoration of vegetation typical of natural systems has sometimes been successful), restoration of tidal freshwater marsh vegetation is likely to be more difficult, particularly in urban areas. Watershed urbanization alters hydrology, sediment load, propagule availability and composition, nutrient status, and other variables that together create an environment different from that of wetlands in less developed areas, possibly precluding restoration of typical marsh vegetation. Tidal freshwater wetlands were historically extensive along the Anacostia River in Washington, DC, but most of these were lost due to filling, dredging, or hydrologic alteration. Over the last decade, the U.S. Army Corps of Engineers has implemented projects designed to restore tidal freshwater wetlands along the Anacostia, which involved increasing elevation with dredged river sediment and planting native vegetation. To illustrate some of the mechanisms affecting vegetation development in restored tidal freshwater marshes in urban areas, I present a case study on one of these wetlands, Kingman Marsh, that also includes research at another restored wetland and two natural reference sites. Studies by my research groups indicate that the restored wetlands undergo essentially a planting-modified process of primary succession. Low densities of seeds are initially present in the substrate, and prolific seed dispersal into the restored sites results in high initial plant diversity comprised of plantings and ruderal (i.e. weedy) natives and exotics. Seed banks develop rapidly at the restored sites, probably du

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Broadband absorptance high efficiency silicon nanowire fractal arrays for photovoltaic applications

Broadband absorptance high efficiency silicon nanowire fract...

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2014 MRS Spring Meeting

作者： Alzoubi, Omar H. Abu-Safe, Husam Alshurman, Khalid Naseem, Hameed A. Department of Electrical Engineering University of Arkansas FayettevilleAR72701 United States Natural Resources Engineering and Management German-Jordanian University Madaba Jordan Microelectronics and Photonics Program University of Arkansas FayettevilleAR72701 United States

Nanowire arrays have been proposed to enhance light trapping, increase efficiencies, and reduced material cost in photovoltaic solar cells. In this work we present a new crystalline silicon nanowire array structure, inspired by fractal geometry. The array structure is assumed to be an infinite 2D array in the x and y directions, and composed of vertically aligned SiNW suspended in air. Hexagonal fractal-like geometry is adapted in arranging cylindrical SiNW in these arrays. Full-wave finite element method 3D simulation is used to compute reflectance, transmittance and absorptance of the array for a normal incidence plane wave. The proposed fractal-like distribution of SiNW arrays yield broad absorption spectrum and enhanced efficiency while using less material. The efficiency of the proposed fractal-like SiNW arrays achieve ∼100% enhancement over that of the equivalent thickness flat c-Si film, and ∼18% enhancement over an equivalent height hexagonal array. The proposed optimized structures achieved a filling ratio ∼25%, which is ∼33% less than the corresponding hexagonal array. Copyright © 2014 Materials Research Society.

关键词： Silicon compounds

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