Dynamic distribution monitoring and biomass estimation of aquatic vegetation in Jupiá Hydropower Station, Brazil DOI Creative Commons
Yujie Fan, Zhonghua Yang, Wenxin Huai

и другие.

Journal of Hydrology Regional Studies, Год журнала: 2023, Номер 51, С. 101606 - 101606

Опубликована: Дек. 12, 2023

Jupiá Hydropower Station, the junction of São Paulo and Mato Grosso, Brazil. During flood season, a large amount aquatic vegetation is brought to front dam, which not only threatens safety project but also causes internal pollution in reservoir. This study combined field data with remote sensing technology analyze temporal spatial succession Reservoir. The biomass inversion models were established estimate whole reservoir area. (1) area rainy season could reach twice that dry season. From 2018–2022, total showed an overall trend increase. (2) floating submerged fluctuated little from 2018 2022, annual average 32.14 × 104 t, accounts for 23.5% biomass. Submerged was important object management this

Язык: Английский

Hydrodynamics, Diagenesis and Hypoxia Variably Drive Benthic Oxygen Flux in a River‐Reservoir System DOI Creative Commons

Yuanning Zhang,

Xueping Gao,

Bowen Sun

и другие.

Water Resources Research, Год журнала: 2024, Номер 60(1)

Опубликована: Янв. 1, 2024

Abstract Benthic oxygen flux with complex spatiotemporal variations is essential for the global budget of carbon dioxide and regional security water quality ecology, but its dominant driver under different circumstances has yet to be identified. In this study, a parametric scheme was proposed validated aquatic eddy correlation measurements then coupled diagenesis model environment model. The applied river‐reservoir significant environmental gradients in hydrodynamics, diagenesis, hypoxia, which are three factors that competitively drive variation benthic flux. results indicate hydrodynamics dominate riverine thalweg areas, lacustrine bank hypoxia shows dominance only hypolimnetic anoxic area. general, river‐reservoirs, followed by both more prominent than hypoxia. If operated reservoir experiences wet year, tends increase, while decreases. divers exhibit similar stable systems reservoirs, becomes exclusive fluxes systems.

Язык: Английский

Процитировано

8

An integrated framework consisting of spatiotemporal evolution and driving force analyses for early warning management of water quality DOI

Jianying Cai,

Xuan Wang, Yanpeng Cai

и другие.

Journal of Cleaner Production, Год журнала: 2024, Номер 462, С. 142628 - 142628

Опубликована: Май 19, 2024

Язык: Английский

Процитировано

8

New Drag Force Formula of Bending Stems in Deriving Analytical Solutions of Velocity Profile for Flow Through Flexible Vegetation DOI Creative Commons
Jinjin Li, Weijie Wang,

Fei Dong

и другие.

Water Resources Research, Год журнала: 2024, Номер 60(7)

Опубликована: Июль 1, 2024

Abstract Investigations of water flow movements affected by vegetation is a research hotspot in ecological restoration. The theory and equations the velocity distribution under influence rigid are relatively mature. This study proposes new drag force equation that varies with bending angle analytical solution profile. Comparisons between model calculation experimental data, results showed this proposed produced accurate simulations for through flexible various deflections. In addition, was verified to be applicable without angle. Moreover, features parameters adopted discussed, empirical these presented. further improves field environmental fluid mechanics can serve as theoretical underpinning restoration river courses.

Язык: Английский

Процитировано

5

Analytical solutions of flow velocity profile based on the morphological response of flexible vegetation DOI
Weijie Wang,

Yan-Fang Zhao,

Shi Ren

и другие.

Journal of Hydrology, Год журнала: 2023, Номер 624, С. 129839 - 129839

Опубликована: Июнь 22, 2023

Язык: Английский

Процитировано

11

Water quality evolution of water-receiving lakes under the impact of multi-source water replenishments DOI Creative Commons

Xu-Shen Zhou,

Bowen Sun, Guomin Chen

и другие.

Journal of Hydrology Regional Studies, Год журнала: 2024, Номер 53, С. 101832 - 101832

Опубликована: Май 22, 2024

The Baiyangdian Lake, Xiong'an New Area of Hebei Province, China. construction water transfer projects provides feasible measures for lake space and ecology restoration, with a critical issue in this practice being how to efficiently utilize multiple sources replenishments improve the quality water-receiving lakes. This study developed hydrodynamic model which receives from upstream reservoirs within its basin two other basins. Simulation scenarios varied proportions receiving these were set up model, optimal replenishment scheme best improvement was determined. multi-source can effectively enhance environment lakes, transported basins has more positive effect than that released local basin; additionally, found be improved during non-flood seasons compared flood seasons. Under preferred scheme, average concentrations ammonia, total nitrogen, phosphorus core areas all decreased by 10%. However, may induce divergence indicators aquatic system evolutions making fragmented. proposes further exploit benefits while mitigating potential risks enhancing hydrological connectivity integrating monitoring mathematical modeling.

Язык: Английский

Процитировано

4

Effect of common ions aging treatment on adsorption of phosphate onto and control of phosphorus release from sediment by lanthanum-modified bentonite DOI

Yanhui Zhan,

Bo Qiu,

Jianwei Lin

и другие.

Journal of Environmental Management, Год журнала: 2023, Номер 341, С. 118109 - 118109

Опубликована: Май 10, 2023

Язык: Английский

Процитировано

9

Abrupt diatom assemblage shifts in Lake Baiyangdian driven by distinct hydrological changes and yet more so by gradual eutrophication DOI
Xin Mao, Linjing Liu, Hongmei Zhao

и другие.

Limnologica, Год журнала: 2024, Номер 105, С. 126155 - 126155

Опубликована: Фев. 21, 2024

Язык: Английский

Процитировано

3

An analytical study for predicting incipient motion velocity of sediments in ecological open channel flows DOI Creative Commons
Jiao Zhang, Zhangyi Mi, Wen Wang

и другие.

Physics of Fluids, Год журнала: 2024, Номер 36(4)

Опубликована: Апрель 1, 2024

Sediment movements on the riverbeds are crucial in fluvial processes. Therefore, studying incipient sediment motion is valuable for predicting changes behavior. In this study, influence of aquatic vegetation introduced into momentum balance equation under condition a bare bed. The presented model open channels covered by derived, consideration density and relative submergence. This study simplifies format. its coefficients demonstrate good applicability to various working conditions without requiring numerous changes. predicted velocity determined proposed validated against experimental data. Results show excellent agreement between two scenarios, including combinations rigid or flexible submerged emergent states. Additionally, observed decrease with increasing density. However, further increase may amplify resistance, hindering motion. Meanwhile, movement becomes challenging as water depth increases, assuming that flow discharge remain constant.

Язык: Английский

Процитировано

3

Integrated nonstationary and uncertain analysis of coupled relationship of hydrological connectivity and water level in a highly fragmented wetland DOI
Dan Liu, Xuan Wang, Zhongjing Wang

и другие.

Journal of Environmental Management, Год журнала: 2024, Номер 360, С. 121137 - 121137

Опубликована: Май 25, 2024

Язык: Английский

Процитировано

3

Elucidating the Composition and Transformation of Dissolved Organic Matter at the Sediment–Water Interface Using High-Resolution Mass Spectrometry DOI
Jinfeng Ge, Yulin Qi, Sen Xu

и другие.

Journal of the American Society for Mass Spectrometry, Год журнала: 2024, Номер unknown

Опубликована: Сен. 17, 2024

The exchange and transformation of dissolved organic matter (DOM) at the sediment-water interface are crucial factors in regulating watershed biogeochemistry, with molecular composition DOM serving as a pivotal determinant elucidating this process. High-resolution mass spectrometry (HRMS) is an effective tool for resolving DOM. By analyzing compositional characteristics under three different salinities same latitude region northern China, findings indicate certain variations component between low-salinity inland waters high-salinity seawaters, former exhibiting greater diversity higher weights, whereas latter displayed saturation bioavailability. Notably, presence more CHOS substances underscores influenced by terrestrial inputs anthropogenic activities. Conversely, CHO CHNO seawater microbial effects. chemical process from overlying water to pore sediments was characterized methylation, hydrogenation, decarboxylation, reduction, determined calculating relations H/C O/C ratios compound types. These that HRMS can yield refined results revealing environments, which provides reliable basis deeper understanding source-sink mechanism sediment matter.

Язык: Английский

Процитировано

3