Article
Green & Sustainable Science & Technology
Mingming Geng, Kelin Wang, Nan Yang, Feng Li, Yeai Zou, Xinsheng Chen, Zhengmiao Deng, Yonghong Xie
Summary: The study analysed the spatiotemporal variations of water quality and hydrological factors in Dongting Lake, identifying nutrient inputs as the main pollution source and water discharge and water level as important factors influencing water quality. Tributaries contributed significantly more to lake water quality than channels, with their pollution contribution decreasing after the operation of the Three Gorges Dam.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Wenzhong Tang, Limin Shu, Jack C. Ng, Yaohui Bai, Yu Zhao, Hui Lin, Hong Zhang
Summary: This study analyzed the content characteristics of seven metals (As, Cd, Cr, Cu, Hg, Pb, and Zn) in the surface sediment of Dongting Lake (DTL) and found that the metal fluxes in DTL have shifted from deposition to export, with a weakening effect on sediment quality in recent years.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Civil
Dongdong Zhang, Minglong Dai, Yanqing Li, Pengxin Deng, Gaohong Xu
Summary: In this study, a one-dimensional and two-dimensional coupled hydrodynamic model based on MIKE simulation modules was used to analyze the influence of the Three Gorges Reservoir on the hydrological regime in Dongting Lake. The results showed that the operation of the reservoir altered the inflow from the Jingjiang River and the outflow speed from Dongting Lake to the Yangtze River. This methodology can provide technical support for optimizing the refill operation of the Three Gorges Reservoir.
JOURNAL OF HYDROLOGIC ENGINEERING
(2022)
Article
Environmental Sciences
Yan Zhou, Lei Jing, Shaoquan Wang, Yifei Jia, Yushu Wang, Guangchun Lei
Summary: This study aimed to determine the environmental factors that determine ecosystem respiration during the drawdown period in a typical shallow sub-tropical lake in China. It found that the exposed mudflat was the most active area releasing carbon dioxide (CO2) into the atmosphere, and this emission was further intensified by Carex colonizing. Therefore, reducing the duration and area of mudflat exposure can help to reduce CO2 emissions in shallow sub-tropical lakes.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Fang Zheng, Yiqun Gan, Liu Yang, Jing Wu
Summary: Quantifying the impacts of climate change on evapotranspiration (ET) and gross primary production (GPP) in the Dongting Lake Basin is crucial for assessing water scarcity and implementing sustainable development strategies. This study used various analysis methods to analyze the influence of climate change on eco-hydrological parameters in the region. The results showed that temperature and precipitation were the main drivers of ET and GPP enhancement.
APPLIED SCIENCES-BASEL
(2023)
Article
Geosciences, Multidisciplinary
Juanjuan Fang, Yitian Li, Dong Wang, Shuai Xie
Summary: Lake systems are crucial for the environment and society, but they have been significantly impacted by climate change and human activities. The operation of the Three Gorges Project has affected the hydrological state and water balance in the Dongting Lake area, leading to water supply problems and a decrease in water level. Strategies such as adjusting impoundment schedules can alleviate the impact and increase water supply capacity.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Biodiversity Conservation
Xiaoliang Sun, Yao Du, Yamin Deng, Hongchen Fan, Teng Ma, Yiqun Gan
Summary: This study quantifies the rates of lacustrine groundwater discharge (LGD) and associated nutrient loads in contrasting geological conditions in East Dongting Lake (EDL) and discusses the influence of geology on the spatial differences. The results show that geological conditions significantly affect LGD rates and associated nutrient loads in the lake area.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Xuming Xu, Yaru Xu, Nan Xu, Baozhu Pan, Jinren Ni
Summary: This study investigated the occurrence and concentrations of 35 typical PPCPs in the water, sediment, and freshwater mollusks of Dongting Lake. The results showed distinct seasonal differences in PPCP compositions and the presence of PPCPs in the soft tissues of mollusks. The findings highlight the importance of controlling the bioavailability of PPCPs in water and sediment for ecological risk management in freshwater lake ecosystems.
Article
Geosciences, Multidisciplinary
Yunping Yang, Wanli Liu, Jie Zhang, Lijie Yang, Menglin Jia, Lingling Zhu
Summary: Human activities and climate change have significantly altered the hydrological and geomorphological processes of rivers and lakes, impacting waterway depth utilization. Taking the Dongting Lake-Jingjiang confluence as an example, the decrease in water and sediment distribution of Dongting Lake's three outlets has affected the waterway dimensions, thereby affecting navigation safety.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geography, Physical
Sidong Zeng, Xin Liu, Jun Xia, Hong Du, Minghao Chen, Renyong Huang
Summary: Understanding the hydrological effects of the Three Gorges Dam operation is crucial for optimal dam regulation. A large-scale coupled hydrological-hydrodynamic-dam operation model was developed to comprehensively evaluate the effects of the Three Gorges Reservoir. The model proved to be effective in simulating hydrological conditions, hydrodynamic regimes, and hydropower production. Dam operation positively impacted flood control by reducing the maximum daily flood peak by up to 26.2%, while also increasing hydropower production and water supply during the dry season.
JOURNAL OF GEOGRAPHICAL SCIENCES
(2023)
Article
Engineering, Civil
Jinliang Zhang, Yizi Shang, Jinyong Liu, Jun Lu, Shitao Wei, Zhanwei Wan, Qiushi Luo, Cuixia Chen, Liang Tong, Qing Wang, Jian Fu
Summary: The study proposes a method to remodel the water-sediment relationship of natural rivers by optimizing reservoir operation, aiming to improve the management of silt-laden rivers. This method was validated through practical tests in the Yellow River in China, demonstrating its effectiveness in enhancing sediment transport capacity in the lower reaches of the river.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Lianlian Zhu, Zhengmiao Deng, Yonghong Xie, Chengyi Zhang, Xiaorong Chen, Xu Li, Feng Li, Xinsheng Chen, Yeai Zou, Wei Wang
Summary: The study found that the contribution of litter to the surface soil organic carbon pool varies under different hydrological conditions, with more significant decomposition during the flooding season.
Article
Water Resources
Yuannan Long, Wenwu Chen, Changbo Jiang, Zhiyong Huang, Shixiong Yan, Xiaofeng Wen
Summary: This study improved streamflow simulation in the data-scarce Dongting Lake Basin by coupling hydrological and hydrodynamic models and considering water yields. The results showed that the coupled model reduced the relative error of streamflow simulation, indirectly verifying the results in data-scarce areas. The study estimated the annual water yields in the data-scarce areas and found a seasonal variation, primarily from April to July. The coupled model approach can be applied to other data-scarce regions to improve streamflow simulation accuracy.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Geosciences, Multidisciplinary
Han Wu, Hucai Zhang, Xiaonan Zhang, Wei Peng, Qi Liu, Fengwen Liu, Yun Zhang, Lizeng Duan
Summary: Research on Lake Dian has shown significant sedimentation hiatus around the funnel areas, with potential massive water outflow triggered by underlying karst collapse leading to erosional hiatus in the lakebed. Continuous clay deposits suggest water leakage may have ceased since the 1930s, but recent bathymetric surveys revealed an increase in lake depth, indicating small-scale, slow water leakage that could potentially trigger catastrophic water discharge in the future.
Article
Engineering, Environmental
Xiaoliang Sun, Yao Du, Yamin Deng, Hongchen Fan, Yanqiu Tao, Teng Ma
Summary: Lacustrine groundwater discharge plays a crucial role in the water and contaminant mass balance of Dongting Lake, with nutrients and heavy metals being significant components. Despite the relatively small discharge rate, contaminant input from groundwater discharge poses a potential threat to the ecological stability of the lake.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2021)