Article
Environmental Sciences
Hee Won Son, Sun Hee Shim, Haeseong Oh, Jung Hyun Choi
Summary: The study investigated the concentrations and characteristics of Cu, Zn, and Pb contamination in sediment samples, and assessed the influence of the Hapcheon-Changnyeong weir on sediments in the Nakdong River. Sequential extraction was used to determine the origins, bioavailability, and mobility of contaminants. The results showed higher concentrations of heavy metals near the weir, with Cu mainly in the residual fraction and Zn predominantly in the reducible fraction. Some samples exceeded Canadian guidelines for heavy metal concentrations, indicating the need for continuous monitoring.
Article
Environmental Sciences
Peter Vasilevskiy, Ping Wang, Sergey Pozdniakov, Tianye Wang, Yichi Zhang, Xuejing Zhang, Jingjie Yu
Summary: Surface water-groundwater interactions in arid zones are complex and challenging to simulate due to scarce field observations and spatial heterogeneity of hydrogeological parameters. This study conducted simulations in the Ejina Basin using remote sensing data, showing that combining remote sensing products can effectively reduce uncertainty in coupled surface water and groundwater simulations where observations are sparse.
Article
Environmental Sciences
Youn-Young Jung, Seung-Hyun Choi, Moojin Choi, Yeon-Sik Bong, Min-Yeong Park, Kwang-Sik Lee, Woo-Jin Shin
Summary: This study aimed to determine the natural and anthropogenic sources affecting water geochemistry by considering seasonality. Water samples were collected from a main channel and tributaries, and the results showed that carbonate and silicate weathering associated with sulfuric and carbonic acids predominantly explained the water geochemistry. The impact of the smelter was evident, particularly in winter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Honghua Zhou, Yaning Chen, Zhaoxia Ye, Yupeng Li, Chenggang Zhu
Summary: This study assessed the impact and mechanism of water diversion on the TDS content of Bosten Lake. The results showed that water diversion effectively reduced the TDS content of the lake water and improved its spatial distribution. Water diversion accelerated water movement and exchange, significantly decreasing the TDS content of the lake water.
Article
Environmental Sciences
Zhaoxia Ye, Shifeng Chen, Qifei Zhang, Yongchang Liu, Honghua Zhou
Summary: The study showed that the area of Taitema Lake increased at a rate of 144% per year due to the Ecological Water Conveyance Project, causing the ecological water demand to vary with different flow years.
Article
Environmental Sciences
Jongchan Kim, Andreja Jonoski, Dimitri P. Solomatine, Peter L. M. Goethals
Summary: The control of nitrate nitrogen (NO3-N) concentration is crucial, especially in sources of drinking water like the Nakdong River in South Korea. This study developed a process-based model using HEC-RAS to address NO3-N pollution and propose guidelines for controlling it in the river. The model incorporated water quality parameters and hydraulic and meteorological data. Simulation results showed that limiting the NO3-N concentration upstream could directly control the peak concentration downstream. Additionally, controlling the flow rate upstream could reduce the overall average concentration downstream, particularly when the NO3-N concentration was decreasing.
Article
Environmental Sciences
Biqing Tian, Peng Gao, Xingmin Mu, Guangju Zhao
Summary: In this study, changes in the water area of Poyang Lake from 1977-2021 were investigated using remote sensing imagery, hydrological data, meteorological data, and land use surveys. The results showed that the water area of Poyang Lake decreased during the study period, primarily due to changes in river runoff and sediment load. The construction of the Three Gorges Dam also played a role in reducing water flow into the lake, resulting in a decrease in water area in certain seasons.
Article
Geography, Physical
Lesheng An, Kaihua Liao, Lei Zhu, Baohua Zhou
Summary: The water level of Caizi Lake varies significantly between seasons, with the next few years likely to experience low water levels. There is a close correlation between the water levels of Caizi Lake and the Anqing hydrological station of the Yangtze River. The impact of river-lake isolation and the Yangtze-to-Huaihe Water Diversion Project on the hydrological regime and eco-environment of Caizi Lake requires long-term monitoring and research.
JOURNAL OF GEOGRAPHICAL SCIENCES
(2021)
Article
Remote Sensing
Juan Wang, Shengtian Yang, Hezhen Lou, Huiping Liu, Pengfei Wang, Chaojun Li, Fei Zhang
Summary: Research on the response of river evolution to lake water level changes in the Ebinur Lake Basin over the past 5000 years revealed three geomorphic development stages and confirmed that human activities leading to a decline in lake water level will accelerate river erosion.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2021)
Article
Environmental Sciences
Eun-Ji Won, Dokyun Kim, Je-Won Yoo, Soyeon In, Kyung-Hoon Shin, Young -Mi Lee
Summary: The experimental results showed that the brackish water flea exposed to the cyanobacteria toxin MC exhibited antioxidant responses at the molecular and enzyme levels, but no acute toxicity. The brackish water flea exposed to algal blooms could absorb and accumulate MC, with a significant increase in MC content in the body after exposure.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Mingming Geng, Yandong Niu, Xiaohong Liao, Kelin Wang, Nan Yang, Zhan Qian, Feng Li, Yeai Zou, Xinsheng Chen, Zhengmiao Deng, Yonghong Xie
Summary: The study on water quality in Dongting Lake from 2015 to 2018 revealed significant spatial and seasonal variations in water quality parameters, with a notable relationship between water level and water quality. The pollution level in the lake ranged from slightly to moderately polluted.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Microbiology
Sangmin Won, Chajeong Shin, Ho Young Kang
Summary: This study demonstrates that microcosms isolated from river water can effectively detoxify arsenic under both organic-matter-rich and -deficient conditions.
Article
Green & Sustainable Science & Technology
Mi-Ah Kim, Eunhye Na, Suyoung Park, Taegu Kang, Soyoung Lee
Summary: This study used multivariate log-linear models to assess the water quality target attainment in the Nakdong River Basin and identified the main factors influencing water quality and seasonal variations. The analysis revealed that flow is the main factor affecting water quality with a significant impact on BOD and TP concentrations in tributaries and the main stream. The majority of sites have met the water quality targets for BOD and TP.
Article
Engineering, Civil
Huawu Wu, Qi Huang, Congsheng Fu, Fan Song, Jinzhao Liu, Jing Li
Summary: The interactions between the Yangtze River and Poyang Lake are undergoing rapid changes due to human activities and climate change. The isotopic compositions in river and lake water show temporal heterogeneity across seasons but spatial homogeneity, suggesting the influence of local precipitation, groundwater, and lake hydrology. The study also highlights the importance of precipitation as the main water source for the lake and river, as well as the impact of Three Gorges Dam regulation and water discharge in the complex lake-river interactions.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Naree Park, Junho Jeon
Summary: The study found the presence of various anthropogenic substances in the Nakdong River in Korea, with niflumic acid and melamine showing the highest concentrations. The content of these substances was influenced by seasonal changes, with concentrations increasing in winter for some substances, and in summer and spring for others. These changes were also reflected in the risk quotient (RQ) values.