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SSRN 2024年

作者： Keovongsa, Iep Fitriyah, Atiqotun Okura, Fumi Noda, Keigo Yoshida, Koshi Keokhamphui, Keoduangchai Kato, Tasuku Department of Environmental and Agricultural Engineering United Graduate School of Agricultural Science Tokyo University of Agriculture and Technology Japan Japan International Research Center for Agricultural Sciences Japan Department of Biological and Environmental Engineering Graduate School of Agricultural and Life Sciences The University of Tokyo Japan Department of International Studies Graduate School of Frontier Sciences The University of Tokyo Japan Department of Meteorology and Hydrology Faculty of Water Resources National University of Laos Laos

Paddy fields, known as providers of ecosystem services, play a vital role in food security amid climate changes. Mapping and tracking changes in paddy fields are essential approaches for understanding ecosystem services and food security, especially, in tropical monsoon watersheds, where land use is rapidly changing due to ongoing urbanization and population growth. This study proposes an integrated approach that uses the adjusted phenology paddy rice pixel-based method (PPPM) and supervised maximum likelihood classification (MLC) to map active paddy fields using multitemporal images and multispectral bands. The extent of natural water was used to adjust PPPM, while detecting rice biomass and other land use/land cover (LULC) classes aided in enhancing the adjusted PPPM-based method and analyzing LULC changes over thirty-two years, respectively. Results indicate the effectiveness of the integrated approach, demonstrating an overall classification accuracy of 83.6%–90.4% and a kappa coefficient of 0.80–0.88. Specifically for paddy field class, reasonable accuracies were achieved for user (72%–88%) and producer (86%–92%), indicating a slight overestimation of paddy field area because of fallowed paddy fields. From 1989–2021, paddy field areas decreased considerably from 20.12% to 36.48%, while urban areas increased rapidly from 6.05% to 31.69%. Notably, urban expansion replaced 22.91% of paddy field areas. Rapid urbanization driven by domestic migrants resulted in increased land demand in areas close to roads and densely populated regions, which could explain these changes. The findings of this study will provide a viable integrated approach for mapping paddy fields in tropical monsoon areas and suggest an urgent need for robust policies. These policies should address haphazard urbanization and bridge the income gap between farming and non-farming activities to ensure sustainable local food supply and diverse ecosystem services across the capital city. © 2024, The Auth

关键词： Land use

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Introducing a Novel Hybrid Agent-Based Framework for Simulating the Adoption of Residential water Conservation Behaviors

Introducing a Novel Hybrid Agent-Based Framework for Simulat...

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World environmental and water resources Congress 2023: Adaptive Planning and Design in an Age of Risk and Uncertainty

作者： Shahangian, Seyyed Ahmadreza Tabesh, Massoud Yazdanpanah, Masoud Akbarzadeh, Abbas Raoof, Mohammad Amin Zobeidi, Tahereh Hajibabaei, Mohsen Sitzenfrei, Robert School of Civil Engineering College of Engineering Univ. of Tehran Tehran Iran Water and Wastewater Research Center Water Research Institute Tehran Iran Dept. of Agricultural Extension and Education Agricultural Sciences and Natural Resources Univ. of Khuzestan Mollasani Iran Dept. of Family Youth and Community Sciences Univ. of Florida GainesvilleFL United States Dept. of Civil Engineering Sharif Univ. of Technology Tehran Iran Advancing System Analysis Program International Institute for Applied Systems Analysis Laxenburg Austria Unit of Environmental Engineering Dept. of Infrastructure Engineering Univ. of Innsbruck Innsbruck Austria

ISBN: (数字)9780784484852

ISBN: (纸本)9780784484852

Promoting household adoption of water conservation behaviors (WCBs) has emerged as a vital strategic response to address water scarcity. Nevertheless, it is imperative to recognize that acceptance of residential WCBs relies on households' voluntary engagement, as are interventions designed to encourage households to become involved in such actions. Meanwhile, environmental psychology plays a key role in understanding individuals' WCBs and exploring the psychosocial determinants underlying these behaviors. Furthermore, the spread of technology and behavior among a population are known as a complex adaptive system (CAS), and agent-based modeling (ABM) offers a comprehensive and practical approach to studying CASs. Hence, the main aim of the present research is to introduce a novel, hybrid agent-based framework for simulating the adoption of residential WCBs, in which an extended model of the theory of planned behavior acts as household agents' behavioral rule for adopting water-efficiency behaviors (WEBs). The framework is also grounded in various theories rooted in psychological and social sciences. Moreover, the presented framework integrates ABM and structural equation modeling approaches. Although this study mainly focuses on WEBs, the framework includes a mechanism to update agents' water use based on their adoption level of water curtailment behaviors. Thus, the presented framework allows for simultaneously but separately exploring the preferred level of both types of WCBs among household agents. Finally, total water consumption is systematically calculated based on agents' aggregated behavior. © World environmental and water resources Congress *** rights reserved

关键词： water conservation

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Rainfall frequency analysis using event-maximum rainfalls – An event-based mixture distribution modeling approach

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Weather and Climate Extremes 2024年 43卷

作者： Cheng, Ke-Sheng Chen, Bo-Yu Lin, Teng-Wei Nakamura, Kimihito Ruangrassamee, Piyatida Chikamori, Hidetaka Department of Bioenvironmental Systems Engineering National Taiwan University Taipei Taiwan Master Program in Statistics National Taiwan University Taipei Taiwan Graduate School of Agriculture Kyoto University Kyoto Japan Department of Water Resources Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand Department of Environmental Management Engineering Okayama University Okayama Japan

Rainfall frequency analysis, an essential work for water resources management, is often conducted by using the annual maximum rainfall series. For rainfall stations with short record lengths and outliers presence, the use of annual maximum series for rainfall frequency analysis may yield design rainfall estimates of higher uncertainties. Moreover, for regions with cyclostationary climate patterns, the annual maximum rainfalls may be caused by different prevalent storm types, which differ in terms of their occurrence frequency and storm rainfall characteristics. In this study, we propose a novel event-maximum-rainfall-based mixture distribution modeling approach for rainfall frequency analysis. By considering the event-maximum rainfalls of individual storm events, the sample size for parameter estimation increases, and the uncertainty of design rainfall estimates reduces. Mixture distribution modeling enables a thorough investigation of the contributing probabilities of different storm types to the annual maximum rainfall. Through rigorous stochastic simulation, we demonstrated the superiority of the proposed approach over the conventional annual maximum rainfall approach. The proposed approach was applied to four representative rainfall stations in Taiwan, and the results revealed that the proposed approach is more robust than the conventional annual maximum rainfall approach. The results provide insights into the contributions of individual storm types to the annual maximum rainfall. © 2023 The Authors

关键词： Annual maxima Event-maximum rainfalls Frequency analysis Mixture distribution Negative binomial distribution Poisson distribution

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Rainfall Frequency Analysis Using Event-Maximum Rainfalls – an Event-Based Mixture Distribution Modeling Approach

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SSRN 2023年

作者： Cheng, Ke-Sheng Chen, Bo-Yu Lin, Teng-Wei Nakamura, Kimihito Ruangrasamee, Piyatida Chikamori, Hidetaka Department of Bioenvironmental Systems Engineering National Taiwan University Taipei Taiwan Master Program in Statistics National Taiwan University Taipei Taiwan Graduate School of Agriculture Kyoto University Kyoto Japan Department of Water Resources Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand Department of Environmental Management Engineering Okayama University Okayama Japan

Rainfall frequency analysis, an essential work for water resources management, is often conducted by using the annual maximum rainfall series. For rainfall stations with short record lengths and outliers presence, the use of annual maximum series for rainfall frequency analysis may yield design rainfall estimates of higher uncertainties. Moreover, for regions with cyclostationary climate patterns, the annual maximum rainfalls may be caused by different prevalent storm types, which differ in terms of their occurrence frequency and storm rainfall characteristics. In this study, we propose an event-maximum-rainfall-based mixture distribution modeling approach for rainfall frequency analysis. By considering the event-maximum rainfalls of individual storm events, the sample size for parameter estimation increases, and the uncertainty of design rainfall estimates reduces. Mixture distribution modeling enables a thorough investigation of the contributing probabilities of different storm types to the annual maximum rainfall. Through rigorous stochastic simulation, we demonstrated the superiority of the proposed approach over the conventional annual-maximum-rainfall approach. The proposed approach was applied to four representative rainfall stations in Taiwan, and the results revealed that the proposed approach is more robust than the conventional annual-maximum-rainfall approach. The results provide insights into the contributions of individual storm types to the annual maximum rainfall. © 2023, The Authors. All rights reserved.

关键词： Poisson distribution

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An integrated biophysical-ecological assessment of embedded virtual water flows linked to Israel's consumption of agricultural crops

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Science of the Total Environment 2024年 955卷 177195页

作者： Myburgh, Steven Kosatica, Ervin Pfister, Stephan Kissinger, Meidad Fridman, Dor Koellner, Thomas Faculty of Biology Chemistry and Geosciences BayCEER University of Bayreuth Germany School of Geography Earth and Atmospheric Sciences The University of Melbourne Melbourne Australia Institute of Environmental Engineering ETH Zurich Switzerland Sustainability and Environmental Policy Group Department of Geography and Environmental Development Ben-Gurion University of the Negev Beer Sheva Israel Water Research Group Biodiversity and Natural Resources Program IIASA Laxenburg Austria

As populations and affluence grows, increased demand for food drives a concomitant increase in associated water scarcity. A relative and absolute increase in crop-embodied virtual water traded between countries is a geopolitically important component of this scarcity. In addition to biophysical dimensions, blue water consumption can have varying impacts on humans and biodiversity. This study focuses on virtual water trade relating to consumption of crops and crop products, and its related socio-ecological impacts, in a water scarce country with high reliance on virtual water, Israel. The results of two established methodologies are assessed, in calculating consumption associated with the virtual water trade of up to 100 crops. Using virtual water quantifications from the methodology with higher spatial resolution, together with two complementary sets of characterisation factors from life cycle impact assessment methodologies (water scarcity indices and potential disappeared fractions) a novel comparison of impacts on ecosystems relating to loss of species and water denial is facilitated. As an additional impact indicator, groundwater depletion is calculated for the virtual water trade of a narrower set of crops. Israel's crop production was found to be associated with outsized cumulative blue water consumption volumes, relative to imports. In addition, regional and country hotspots of blue water consumption, groundwater depletion, downstream user impact and biodiversity loss were identified, including in India, The United States, and the Mediterranean region. Several limitations and suggestions for future application are discussed. © 2024 The Authors

关键词： Biotic

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Contribution of irrigation to the production of maize, wheat, and rice in the major global producing countries

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National Science Review 2024年第11期11卷 44-46页

作者： Zhipin Ai Julien Boulange Xin Zhao Fadong Li Rashid Mahmood Kiril Manevski Yonghui Yang Guirui Yu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences United Graduate School of Agricultural Science Tokyo University of Agriculture and Technology Earth System Division National Institute for Environmental Studies Water Engineering and Management Asian Institute of Technology Sino-Danish College University of the Chinese Academy of Sciences Department of Agroecology Aarhus University Center for Agricultural Resources Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences

Global megatrends in population growth and climate change, together with regional conflicts, are driving an increasing and unequal demand for food and consequently pose a serious threat to food security worldwide. Studies have shown that increasing cropland productivity, rather than expanding cropland area, may be a more viable strategy to promote food security [1]. From an agronomic perspective, irrigation can greatly enhance crop yield and productivity,

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Biological methane production coupled with sulfur oxidation in a microbial electrosynthesis system without organic substrates

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Journal of environmental Sciences 2022年第6期34卷 68-78页

作者： Ha T.T.Dinh Hiromi Kambara Shuji Matsushita Yoshiteru Aoi Tomonori Kindaichi Noriatsu Ozaki Akiyoshi Ohashi Department of Civil and Environmental Engineering Graduate School of Advanced Science and EngineeringHiroshima University1-4-1KagamiyamaHigashihiroshimaHiroshima 739-8527Japan Faculty of Environment Ho Chi Minh City University of Natural Resources and Environment236 Le Van Sy1 WardTan Binh DistrictHo Chi Minh CityViet Nam Agricultural Technology Research Center Hiroshima Prefectural Technology Research Institute6869HaraHachihonmatsuHigashihiroshimaHiroshima 739-0151Japan Program of Biotechnology Graduate School of Integrated Sciences for LifeHiroshima University1-3-1KagamiyamaHigashihiroshimaHiroshima 739-8530Japan

Methane is produced in a microbial electrosynthesis system(MES) without organic substrates. However, a relatively high applied voltage is required for the bioelectrical *** this study, we demonstrated that electrotrophic methane production at the biocathode was achieved even at a very low voltage of 0.1 V in an MES, in which abiotic HS-oxidized to SO_(4)^(2-) at the anodic carbon-cloth surface coated with platinum powder. In addition, microbial community analysis revealed the most probable pathway for methane production from electrons. First, electrotrophic H_(2) was produced by syntrophic bacteria, such as Syntrophorhabdus, Syntrophobacter, Syntrophus, Leptolinea, and Aminicenantales, with the direct acceptance of electrons at the biocathode. Subsequently, most of the produced H_(2) was converted to acetate by homoacetogens, such as Clostridium and Spirochaeta 2. In conclusion,the majority of the methane was indirectly produced by a large population of acetoclastic methanogens, namely Methanosaeta, via acetate. Further, hydrogenotrophic methanogens,including Methanobacterium and Methanolinea, produced methane via H_(2).

关键词： Bioelectricity Homoacetogens Methane production Microbial electrosynthesis system Sulfur oxidation

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Material Modification of Electrodes in Microbial Electrochemical System to Enhance Electrons Utilization on the Electrode and its Impact on Microorganisms

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SSRN 2024年

作者： Zhang, Chong Yang, Ke Yuan, Yali Cao, Xian Wang, Hui Sakamaki, Takashi Li, Xianning School of Energy and Environment Southeast University Nanjing210096 China State Key Laboratory of Eco-Hydraulics in Northwest Arid Region Department of Municipal and Environmental Engineering Faculty of Water Resources and Hydroelectric Engineering Xi’an University of Technology Xi’an710048 China Department of Civil and Environmental Engineering Graduate School of Engineering Tohoku University Aoba Aramaki 6-6-06 Sendai980-8579 Japan

Previous research has established a MES embedding a microbial electrode to facilitate the degradation of antibiotics in water. We modified microbial electrodes in the MES with PEDOT and rGO to enhance electron utilization on electrodes and to further promote antibiotic degradation. Density functional theory calculations on the SMX molecule indicated that the C4-S8 and S8-N27 bonds are the most susceptible to electron attack. The introduction of various functional groups and multivalent elements enhanced the electrodes' capacitance and electron mediation capabilities. This led to enhance both electron utilization on the electrodes and the removal efficiency of SMX. After 120 hours, the degradation efficiency of SMX by PEDOT and rGO-modified electrodes increased by 45.47% and 25.19%, respectively, compared to unmodified electrodes. The relative abundance of sulfate-reducing and denitrifying bacteria significantly increased in PEDOT and rGO-modified electrodes, while the abundance of nitrifying bacteria and potential antibiotic resistance gene host microbes significantly decreased. The impact of PEDOT modification positively influenced microbial Cellular Processes, including cell growth, death, and motility. This study provides insights into the mechanisms of direct electron involvement in antibiotic degradation steps in microbial electrochemistry, and provides a possible path for improved strategies in antibiotic degradation and sustainable environmental remediation. © 2024, The Authors. All rights reserved.

关键词： Microbial electrodes

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Modelling and predicting annual rainfall over the Vietnamese Mekong Delta (VMD) using SARIMA

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Discover Geoscience 2024年第1期2卷 1-18页

作者： Minh, Huynh Vuong Thu Van Ty, Tran Nam, Nguyen Dinh Giang Lien, Bui Thi Bich Thanh, Nguyen Truong Cong, Nguyen Phuoc Meraj, Gowhar Kumar, Pankaj Van Thinh, Lam Van Duy, Dinh Van Toan, Nguyen Downes, Nigel K. Bhuyan, Md. Simul Kanga, Shruti Singh, Suraj Kumar Water Resources Department College of Environment and Natural Resources Can Tho University Can Tho Vietnam Water Resource Engineering Department College of Engineering Can Tho University Can Tho Vietnam Environment and Natural Resources Management Department College of Environment and Natural Resources Can Tho University Can Tho Vietnam Department of Environmental Engineering College of Environment and Natural Resources Can Tho University Can Tho Vietnam Department of Ecosystem Studies Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan Institute for Global Environmental Strategies Hayama Japan Department of Personnel Can Tho University Can Tho Vietnam Bangladesh Oceanographic Research Institute Cox’s Bazar Bangladesh Sylhet Agricultural University Sylhet Bangladesh Department of Geography School of Environment and Earth Sciences Central University Bathinda India Centre for Climate Change and Water Research Suresh Gyan Vihar University Jaipur India

Climate and rainfall are extremely non-linear and complicated phenomena, which require numerical modelling to simulate for accurate prediction. We obtained local historical rainfall data for 12 meteorological stations in the Vietnamese Mekong Delta (VMD) for the 45-year period 1978–2022, to predict annual rainfall trends. A statistical time series predicting technique was used based on the autoregressive integrated moving average (ARIMA) model. We utilized the seasonal ARIMA process of the form (p,1,q)(P,1,Q) for our study area. The best seasonal autoregressive integrated moving average (SARIMA) models were then selected based on the autocorrelation function (ACF) and partial autocorrelation function (PACF), the minimum values of Akaike Information Criterion (AIC) and the Schwarz Bayesian Information (SBC). The seasonal autoregressive integrated moving average model with external regressors (SARIMAX) was discovered, and a series of SARIMA models of various orders were estimated and diagnosed. To evaluate model fitting, we used the Nash–Sutcliffe coefficient (Nash) and the root-mean-square error (RMSE). The study has shown that the SARIMA (1, 1, 1)(2, 1, 1)11 and SARIMA (1, 1, 1)(2, 1, 1)12 model were appropriate for analyzing and forecasting future rainfall patterns at particular meteorological station in the VMD. The results showed the SARIMA model is more reliable and provides more accurate projections than other commonly used statistical methods, notably interval forecasts. We found that interpretable and reliable near-term location-specific rainfall predicts can be provided by the SARIMA-based statistical predicting model.

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Deciphering the role of biochar pseudocapacitance strengthening in promoting syntrophic methanogenesis: Microbial capacitance-tropism in propionate metabolism

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Chemical engineering Journal 2024年 502卷

作者： Zhao, Danyang Ding, Lizi Wang, Xuemeng Li, Qian Zan, Feixiang Li, Yu-You Chen, Rong Key Lab of Environmental Engineering Shaanxi Province Xi'an University of Architecture and Technology No.13 Yanta Road Xi'an710055 China Department of Civil and Environmental Engineering Graduate School of Engineering Tohoku University 6-6-06 Aoba Aramaki-Aza Aoba-ku Miyagi Sendai980-8579 Japan International S & T Cooperation Center for Urban Alternative Water Resources Development Key Laboratory of Northwest Water Resource Environment and Ecology MOE Xi'an University of Architecture and Technology No.13 Yanta Road Xi'an710055 China School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan China

The redox functional groups of biochar can act as pseudocapacitance, alleviating acid accumulation and facilitating electron transfer in anaerobic digestion. Fe modification further enhances its pseudocapacitance properties. However, the specific role of pseudocapacitance strengthening in the electron transfer of volatile fatty acid syntrophic methanogenesis, as well as the factors inducing the enrichment behavior and metabolic mechanisms of microbes on its surface, remain unclear. In this study, experiments using acetate and propionate as substrates were conducted with the addition of biochar and electro-enhanced biochar, while 16S rRNA gene amplicon sequencing and metagenomic analysis were employed to investigate the underlying mechanisms. The results demonstrate that strengthening biochar's pseudocapacitance significantly facilitates the electron shunt by accepting electrons, accelerating NADH/NAD+ conversion and ATP synthesis. This further promotes the oxidative degradation of propionate and acetate through the methylmalonyl-CoA (MMC) and syntrophic acetate oxidation (SAO) pathways. During methanogenesis, biochar directly transfers electrons to methanogens, with the strengthened pseudocapacitance further accelerating electron transfer through the CO2 reduction pathway and specifically promoting the methanation of propionate rather than acetate. Moreover, during propionate metabolism, Coprothermobacter and Methanosarcina exhibit capacitance-tropism in their enrichment on biochar, serving as key functional contributors to the biochar-microbial aggregates. These findings provide valuable insights for selecting exogenous materials in engineering applications to alleviate acid accumulation in anaerobic digestion systems. © 2024 Elsevier B.V.

关键词： Fatty acid methyl ester

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