Article
Green & Sustainable Science & Technology
Serey Sok, Nyda Chhinh, Sanara Hor, Pheakdey Nguonphan
Summary: Climate change is causing increased vulnerability to floods and drought among farmers. The study found that between 1994 and 2018, frequent and extreme flood and drought events were the major climate hazards affecting rice production. Drought events tend to have a more severe impact on rice production, but both floods and droughts cause physical, economic, social, and environmental vulnerabilities.
Article
Environmental Sciences
Wen Xin Ng, Edward Park
Summary: The study reveals that extensive riverbed mining has negative impacts on the water level and volume of Tonle Sap Lake, with the erosion in Phnom Penh affecting the water levels in the Mekong more than basin-scale climatic factors. The water level of Tonle Sap is mainly controlled by Tonle Sap River and the Mekong, with declining levels due to sand mining in Phnom Penh leading to the lake's shrinking. The study also highlights the increasing intensity of riverbed mining, particularly in Phnom Penh, and the potential consequences of Tonle Sap's shrinking for the region.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Ty Sok, Chantha Oeurng, Vinhteang Kaing, Sabine Sauvage, Xixi Lu, Jose Miguel Sanchez Perez
Summary: The Mekong River in Asia, one of the world's longest rivers, has high levels of biodiversity and productivity. However, changes in land use, dam construction, population growth, and climate change have led to deteriorating water quality in the basin. This study reveals that the Mekong River is a vital nutrient source, especially during the flood season, for Tonle Sap Lake and its floodplain.
ECOLOGICAL ENGINEERING
(2022)
Article
Zoology
Laorsri Sanoamuang, Santi Watiroyram
Summary: Phyllodiaptomus (Phyllodiaptomus) parachristineae sp. nov. is a new species of diaptomid copepod found in the lower Mekong River Basin floodplain in northeastern Thailand and Cambodia. It shares morphological similarities with P. (P.) christin-eae but differs in certain characteristics. The distribution, habitats, and morphological differences among species in the subgenus Phyllodiaptomus (Phyllodiaptomus) are also discussed.
Article
Engineering, Civil
Edward Park, Huu Loc Ho, Doan Van Binh, Sameh Kantoush, Danielle Poh, Enner Alcantara, Sophal Try, Yunung Nina Lin
Summary: This paper addresses the impact of agricultural expansion on hydrological patterns in the Cambodian Mekong floodplains. Using field and remote sensing data, the study found changes in water level, sediment concentration, and sediment budget due to agricultural expansion. The study suggests that deforestation and land surface elevation changes caused by agricultural activities are driving factors behind the observed hydrological patterns in the floodplain.
JOURNAL OF HYDROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Ty Sok, Chantha Oeurng, Vinhteang Kaing, Sabine Sauvage, G. Mathias Kondolf, Jose Miguel Sanchez-Perez
Summary: This study analyzed sediment loads in the Mekong River from 1993 to 2018 and found that Tonle Sap Lake has become a sink for sediment since 2001, accumulating a significant amount annually. This has reduced the annual sediment transport to the delta, exacerbating the effects of reduced sediment delivery resulting from upstream dam development and instream sand mining.
Article
Environmental Sciences
Jingrui Sun, Weilong Du, Martyn C. Lucas, Chengzhi Ding, Jinnan Chen, Juan Tao, Daming He
Summary: River barriers, including large dams and small-scale barriers, have a significant impact on fish habitats and can lead to population decline or extinction. Previous studies in the Mekong basin have focused mainly on large dams and neglected the effects of small-scale barriers. The completeness of existing barrier databases was tested, and a comprehensive database was created for the Upper Mekong. The study found that a large percentage of river barriers were absent from existing databases, with small-scale barriers being particularly overlooked. The presence of barriers was found to contribute to fragmentation within the catchment, impacting fish species distribution.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Ecology
Vouchlay Theng, Ratino Sith, Sovannara Uk, Chihiro Yoshimura
Summary: This study aims to develop a two-dimensional primary production model to understand the phytoplankton biomass and growth rates in Tonle Sap Lake, Cambodia. The model successfully described the major spatiotemporal variations of phytoplankton in the lake and revealed that the specific growth rate peaked during the low-water period. It provides important insights into phytoplankton productivity in tropical lake-floodplain systems.
ECOLOGICAL MODELLING
(2023)
Article
Geography, Physical
Yuji Ishii, Toru Tamura, Bunnarin Ben
Summary: This study reconstructs the Holocene sedimentary evolution of the Mekong River floodplain in Cambodia, showing rapid deposition in response to sea-level rise before 6.5 ka and localized levee accretion after 6.5 ka. This evolution is comparable to other large river systems in regions with weakening summer monsoons in the middle to late Holocene.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Samuel De Xun Chua, Xi Xi Lu, Chantha Oeurng, Ty Sok, Carl Grundy-Warr
Summary: The flood pulse in the Cambodian floodplains has changed, with an increase in minimum water levels and a decrease in maximum water levels, resulting in a reduction in flood extent. The duration of the flooding season has become shorter, starting later and ending earlier. The area of the lake has shrunk and the annual reverse flow has decreased. These changes are primarily caused by human activities such as irrigation and channel erosion.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Alexander J. Horton, Nguyen V. K. Triet, Long P. Hoang, Sokchhay Heng, Panha Hok, Sarit Chung, Jorma Koponen, Matti Kummu
Summary: Water infrastructure development is crucial for economic growth in the Mekong region. However, there are still knowledge gaps regarding the impacts of infrastructural development on hydrological and flood pattern changes. This research assesses the implications of hydropower dam construction, irrigation expansion, and climate change on discharge and flood changes in the Cambodian Mekong floodplain.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2022)
Article
Environmental Sciences
Ji-Hyung Park, Hyojin Jin, Tae Kyung Yoon, Most Shirina Begum, Chea Eliyan, Eun-Ju Lee, Seung-Cheol Lee, Neung-Hwan Oh
Summary: Water pollution from untreated wastewater significantly impacts organic matter biodegradation and CO2 pressure along the Mekong-Tonle Sap network near Phnom Penh. High-resolution measurements in the dry season show a large increase in pCO2 downstream in areas receiving urban sewage, while the monsoon survey reveals little spatial variation due to the reversal of water flow. This highlights the importance of considering wastewater-enhanced CO2 production in urbanized river basins to accurately estimate CO2 emissions.
Article
Biodiversity Conservation
Socheat Chrea, Loic Tudesque, Ratha Chea
Summary: This study assessed the suitability of different water quality assessment frameworks for quantifying the health of the Sangker River in Cambodia. The US Environmental Protection Agency method was found to be the most suitable for this river, and could potentially be used in data-scarce environments to monitor river ecosystem health.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Ratha Sor, Peng Bun Ngor, Savoeurn Soum, Sudeep Chandra, Zeb S. Hogan, Sarah E. Null
Summary: Research has shown that water quality in the Mekong River Basin was unpolluted in the 2000s, but has degraded in the last decade, particularly in specific locations. Water quality degradation is likely linked to rapid hydropower development, deforestation, intensive agriculture, plastic pollution, and urbanization.
Article
Environmental Sciences
Charlotte J. Haberstroh, Mauricio E. Arias, Zhewen Yin, Ty Sok, Michael C. Wang
Summary: Field data on plastic pollution in Southeast Asian rivers is scarce. This study conducted the first field measurements of plastic transport in the Mekong, finding that around 2.03 x 10(5) kg of plastic is released from Phnom Penh to the Mekong daily, equivalent to 89g per capita per day and representing 42% of the city's plastic waste. Most plastic mass moves downstream at the surface, with a smaller portion potentially retained in the rivers.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Energy & Fuels
Sin Sokrethya, Zarif Aminov, Nguyen Van Quan, Tran Dang Xuan
Summary: This study examines the feasibility of using rice straw for energy production in Cambodia. Based on rice straw availability data obtained from a graphic information system (GIS), potential areas for a 10 MW biomass-fired power plant installation were identified. The profitability index (PI) was calculated using the discounted cash flow (DCF) method in Mathlab software to determine the period of profitability for the power plant. Prey Veng, Takeo, and Battambang were identified as potential provinces with substantial rice straw resources, and a 20-year project showed that the biomass-fired power plant could reach profitability within six to ten years under certain rice-straw price conditions. The findings also highlight the significant energy production and CO2 emission reduction potential of implementing biomass-fired power plants compared to coal-fired power plants and open-field burning in Cambodia.
Article
Water Resources
Wahidullah Hussainzada, Jonathan Salar Cabrera, Ahmad Tamim Samim, Han Soo Lee
Summary: This study proposes a multidisciplinary approach combining hydrological modeling with multi-criteria decision analysis to mitigate water resource issues in the areas of irrigation, water supply, energy, and flood protection. Using the Soil and Water Assessment Tool (SWAT), the study focuses on the water issues in northern Afghanistan and calibrates the model using monthly streamflow data. By revising the irrigation state and considering crop water requirements, a dam construction solution is proposed to regulate streamflow and address water shortages. Expert opinions and cost-benefit analysis are used to determine dam site locations, estimate dam impact, and ensure project feasibility. The findings provide guidance for future water resource management strategies in the region.
APPLIED WATER SCIENCE
(2023)
Article
Energy & Fuels
Dek Vimean Pheakdey, Vongdala Noudeng, Tran Dang Xuan
Summary: This study evaluates the CH4 generation and GHG emissions from municipal solid waste landfilling in Phnom Penh, Cambodia. Four landfilling scenarios were considered, with varying levels of management and energy recovery. The study suggests that landfill gas-to-energy can significantly reduce GHG emissions.
Article
Energy & Fuels
Dek Vimean Pheakdey, Nguyen Van Quan, Tran Dang Xuan
Summary: This study assessed the energy potential, economic feasibility, and environmental performance of landfill gas (LFG) recovery, incineration, and anaerobic digestion (AD) technologies for Phnom Penh municipality in Cambodia. Incineration produced the highest energy output, LFG recovery and AD technologies yielded equivalent amounts of energy. Incineration and LFG recovery were economically feasible while AD technology had negative NPV but better environmental performance.
Article
Energy & Fuels
Dek Vimean Pheakdey, Nguyen Van Quan, Tran Dang Xuan
Summary: This study assesses GHG emissions and reduction potential in municipal solid waste management (MSWM) based on IPCC 2006 guidelines. By examining various MSWM scenarios in Phnom Penh municipality, the study quantifies GHG emissions from different waste treatment methods and evaluates the effectiveness of waste separation. The findings highlight the importance of an integrated MSWM system with source separation for reducing environmental impacts.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Jae-Soon Jeong, Han Soo Lee, Nobuhito Mori
Summary: The Itsukushima Shrine is a culturally important structure in Japan that is preserved as a World Heritage Site. It was built by the seaside to prevent it from being submerged, but it has still been submerged four times due to internal surges. Research suggests that the destabilization of density stratification by typhoon winds likely caused bay-scale internal waves.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Plant Sciences
Yasser Nehela, Yasser S. A. Mazrou, Naglaa A. A. Taha, Abdelnaser A. A. Elzaawely, Tran Dang Xuan, Abeer H. H. Makhlouf, Asmaa El-Nagar
Summary: This study investigated the antifungal activity of four cinnamate derivatives against Alternaria alternata, the causal agent of early blight disease in tomato. The findings showed that these derivatives exhibited fungistatic action against A. alternata and reduced disease severity and improved growth traits and yield components of infected tomato plants. These derivatives could be potential eco-friendly alternatives to reduce the use of chemical fungicides against A. alternata.
Article
Plant Sciences
Akter Jesmin, La Hoang Anh, Nguyen Phuong Mai, Tran Dang Khanh, Tran Dang Xuan
Summary: This study investigated the effects of fulvic acid on the salinity tolerance of three rice varieties. The results show that the treatment with 0.25 mL/L fulvic acid significantly improved the growth performance and salt tolerance of the rice varieties. Fulvic acid also promoted the accumulation of phenolic compounds in the rice varieties.
Editorial Material
Engineering, Marine
Han Soo Lee, Kyeong Ok Kim, Jin-Hee Yuk, Seung-Buhm Woo, Youngjin Choi
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Thanh-Tri Do, Toan-Em Quach-Van, Thanh-Cong Nguyen, Pau Loke Show, Tran Minh-Ly Nguyen, Duc-Hoan Huynh, Dai-Long Tran, Michael Melkonian, Hoang-Dung Tran
Summary: LEDs are used as light sources in Haematococcus pluvialis cultivation for their energy advantages. Increasing the illumination time with red and blue LEDs can promote biomass growth and astaxanthin accumulation. Adding NaHCO3 can enhance astaxanthin accumulation in algal cells.
BIOENGINEERING-BASEL
(2023)
Article
Green & Sustainable Science & Technology
Md Omar Faruk, Keshav Lall Maharjan
Summary: Floods are a major threat to farmers in Bangladesh's char-land region, and understanding their perception of flood risk and adaptation strategies is crucial. This study analyzes the factors influencing farmers' perceptions of flood risk and their assessments of flood adaptation, emphasizing the need for campaigns and programs to improve flood risk understanding and adaptation.
Article
Chemistry, Multidisciplinary
Phan Trung Thang, Nguyen Van Vien, La Hoang Anh, Tran Dang Xuan, Vu Xuan Duong, Nguyen Thanh Nhung, Khuat Huu Trung, Nguyen Thanh Quan, Cam Chau Nguyen, Le Thi Kim Loan, Tran Dang Khanh, Tran Thi Thu Ha
Summary: This study explored the allelopathic effects of Pinto peanut on different plants and analyzed its potential allelochemicals using GC-MS. The results showed that Pinto peanut had significant inhibitory effects on the growth of grasses and legumes. Field trials also demonstrated that Pinto peanut could reduce the growth of weeds and increase rice yield. This study identified several compounds in the extracts of Pinto peanut that may be responsible for its herbicidal effects.
APPLIED SCIENCES-BASEL
(2023)
Article
Horticulture
Shafiqullah Aryan, Gulbuddin Gulab, Zabihullah Safi, Asmatullah Durani, Mohammad Ghani Raghib, Kifayatullah Kakar, Tayebullah Zahid, Bakht Munir Baber, Yogesh K. Ahlawat, Ihab Mohamed Moussa, Hosam O. Elansary
Summary: Pomegranate production is increasing in Afghanistan, but there is a lack of nursery services. This study found that aloe vera and panchagavya are suitable alternatives to indole-3-butyric acid (IBA) for promoting rooting in pomegranate cuttings, and they are more effective than IBA.
Article
Agriculture, Multidisciplinary
Keshav Lall Maharjan, Manjeshwori Singh, Clarisse Mendoza Gonzalvo
Summary: In Nepal's central hub for organic farming, the farmers in Namobuddha municipality face challenges in implementing environmental conservation agriculture (ECA), such as the impact of climate change and reduced government subsidies. Therefore, increasing awareness and interest among farmers, as well as engaging women in decision-making regarding resource utilization, are crucial for promoting ECA.
JOURNAL OF AGRICULTURE AND FOOD RESEARCH
(2023)
Article
Agriculture, Multidisciplinary
Pradyot Ranjan Jena, Purna Chandra Tanti, Keshav Lall Maharjan
Summary: Climate change poses risks for rural livelihoods, affecting agricultural output and costs. Climate-smart agricultural (CSA) practices, such as crop rotation and integrated soil management, can help mitigate these effects. This study analyzes the adoption drivers and impacts of CSA practices on paddy yield and agricultural income in rural India. The findings show that adopting crop rotation and integrated soil management increases farm income and paddy crop yield. Access to extension services, credit, and subsidies play a significant role in driving adoption. Policy suggestions include training extension staff and allocating financial resources for CSA support, subsidies, and infrastructure.
JOURNAL OF AGRICULTURE AND FOOD RESEARCH
(2023)