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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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Current status of sustainability of Belawan Port toward SDG program 2

Current status of sustainability of Belawan Port toward SDG ...

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2nd International Conference on natural resources and Technology, ICONART 2020

作者： Sulaiman, I.A. Nasution, Z. Rauf, A. Kusuma, M.S.B. Doctoral Program Natural Resources and Environmental Management Universitas Sumatera Utara Medan Indonesia Faculty of Agriculture Universitas Sumatera Utara Medan Indonesia Faculty of Civil and Environmental Engineering Bandung Institute of Technology Bandung Indonesia

Belawan Port is one of the main ports in Indonesia whose role and function are important in the national logistics system. Belawan Port is a gateway for the Province of North Sumatra. The port must have sustainability in carrying out its role and function as transportation and economic infrastructure. In this research, Belawan Port sustainability will be evaluated from several aspects or dimensions, namely ecology, economy, social culture, technology, and institutions and law. Belawan port sustainability analysis using the Multidimensional Scaling method, using the modified Rapfish program. The analysis is carried out on five dimensions and 49 attributes/factors, which are used as a reference in the SDGs program. Not every SDG will be relevant for every business, however, every SDG should be considered. SDGs no.4 and no.5 are not directly related to port management activities, while SDGs no.8,9,11,14,17 are directly related. From the analysis obtained Ecology sustainability index = 48.38 (less-sustainable), Economic sustainability index = 42.89 (Less-Sustainable), Socio-Cultural sustainability index = 52.47 (Fair-Sustainable), Technological sustainability index = 54.11 (Fair-Sustainable), Institutional and Legal sustainability index = 50.74 (Fair-Sustainable). With policy and program interventions, the sustainability of the existing Belawan Port in the short term can be improved to be fair-sustainable for all dimensions (ecology, economy, social & culture, Technology, Institution & Law) evaluated. © Published under licence by IOP Publishing Ltd.

关键词： Sustainable development

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Innovate or Perish: Food Policy Design in an Indigenous Context in a Post-Pandemic and Climate Adaptation Era

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Journal of Open Innovation: Technology, Market, and Complexity 2022年第1期8卷

作者： Lugo-Morin, Diosey Ramon Postgraduate Program in Sustainable Management of Natural Resources Management of Sociological Systems Research and Postgraduate Studies Intercultural University of Puebla State Huehuetla 73475 Mexico

The objective of this study is to explore the strengths of indigenous food systems in Latin America within the framework of effective food policies. The analysis is based on the adaptive ca-pacity of human beings, and, in this logic, it considers the food systems of Latin America to be rele-vant since in the face of challenges, such as climate change and the COVID-19 pandemic, indigenous peoples have been able to establish response strategies. However, beyond these responses, we find a region that has assumed a biopolitical stance with a tendency to design control policies in response to the pandemic. This situation has not improved the inequalities and vulnerabilities of a sector of the indigenous population in Latin America. The aforementioned challenges give a clear picture of the strengths of the region's indigenous people, and knowledge of this interactive dynamic can pro-vide elements for the design of food policies. In this sense, an exhaustive literature review was car-ried out in order to approach the state of the art of the issue. The analysis was derived from three analytical categories that in synergy and from an open innovation perspective, make a proposal for the design and implementation of effective food policies that allow a region to learn from local indigenous experiences in a context of food insecurity. © 2022 by the author. Licensee MDPI, Basel, Switzerland.

关键词： Biosociety COVID-19 Edible wild plants Indigenous Innovation Resilience

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Documenting Twenty Years of the Contracted Labor-Intensive Forestry Workforce on National Forest System Lands in the United States (Jun, fvad026, 2023)

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JOURNAL OF FORESTRY 2023年第5-6期122卷 506-506页

作者： Deak, Alison Huber-Stearns, Heidi Crandall, Mindy Poudel, Kamana Davis, Emily Jane Coughlan, Michael R. Wilmsen, Carl University of California Cooperative Extension Mariposa CA USA Ecosystem Workforce Program Institute for Resilient Organizations Communities and Environments University of Oregon Eugene OR USA School for Environment and Sustainability University of Michigan Ann Arbor MI USA Department of Forest Engineering Resources and Management Oregon State University Corvallis OR USA Forestry and Natural Resources Extension and Department of Forest Ecosystems and Society Oregon State University Corvallis OR USA Northwest Forest Worker Center Ashland OR USA

This paper presents the first nationwide analysis detailing the scope and scale of labor-intensive forestry contracts performed on National Forest System lands and examines the businesses contracted, location and types of work performed, and distance traveled by businesses between 2001 and 2020. During the study period, 61,698 contracts were awarded to 7,896 businesses, totaling $12.9 billion, to perform labor-intensive forestry work, with most work being contracted for wildfire-related activities. Businesses were typically located in western states and non-minority owned businesses received the majority of contracts. Of minority-owned businesses, Hispanic American–owned businesses received the most contracts. The median distance that businesses traveled to accomplish work increased significantly through time but differed by business type. Understanding the scope and work of businesses awarded contracts provides insight into the workforce and its relationship to marginalized populations. Strategic investment in this workforce may have widespread impacts on federal, state, and local economies and the livelihoods of forest *** Implications: Between 2001–2020, the USDA Forest Service spent billions of dollars on contracts with thousands of businesses to conduct labor-intensive forestry projects; however, project locations and awarded businesses were not evenly distributed through space and time. Emerging and minority businesses represented a small proportion of contracts awarded. Advancing understanding of the businesses conducting labor-intensive forestry work lays the foundation for inquiry into the working conditions forest workers experience as well as disparities in contract capture. Some regions may have benefitted more from contract capture than others. Understanding factors enabling places and businesses to capture these contract dollars may help identify others that may benefit from investment.

关键词： USDA Forest Service labor-intensive forestry national forest system federal contracting federal procurement data system product service codes restoration business

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