GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • IWA Publishing  (4)
Material
Publisher
  • IWA Publishing  (4)
Person/Organisation
Language
Years
  • 1
    Online Resource
    Online Resource
    Quantifying the effects of channel change on the discharge diversion of Jingjiang Three Outlets after the operation of the Three Gorges Dam
    IWA Publishing ; 2016
    In:  Hydrology Research Vol. 47, No. S1 ( 2016-12-01), p. 161-174
    Details
    In: Hydrology Research, IWA Publishing, Vol. 47, No. S1 ( 2016-12-01), p. 161-174
    Abstract: The Jingjiang Three Outlets (JTO) are the water-sediment connecting channels between the Yangtze River and the Dongting Lake. The discharge diversion of the JTO plays a dominant role in the flood control of the middle–lower Yangtze River, Dongting Lake evolution, and ecological environment. After the operation of the Three Gorges Dam (TGD), the river channels downstream experienced dramatic channel changes. To study the influences of the channel change on the discharge diversion, the authors analyzed the channel changes by water level–discharge rating curves and cross-sectional channel profiles in 1980–2014. Hence, changes in the water level with the same discharge and the decline of discharge diversion at the JTO were noted. Channel incision caused the water level with the same discharge to greatly decrease in the upper Jingjiang River. The water level with the same discharge significantly increased at the JTO as a result of the channel deposition. The channel changes contributed approximately 37.74% and 76.36%, respectively, to the amount and ratio of discharge diversion decreases after the TGD operation. The channel changes serve as the primary factor in facilitating the decrease in the discharge diversion ratio, but not the main factor for the decreased amount of the discharge diversion.
    Type of Medium: Online Resource
    ISSN: 0029-1277 , 2224-7955
    URL: Article
    DOI: 10.2166/nh.2016.016
    Language: English
    Publisher: IWA Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 2411122-3
    detail.hit.zdb_id: 2142091-9
    SSG: 21,3
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Lake hydrology, water quality and ecology impacts of altered river–lake interactions: advances in research on the middle Yangtze river
    IWA Publishing ; 2016
    In:  Hydrology Research Vol. 47, No. S1 ( 2016-12-01), p. 1-7
    Details
    In: Hydrology Research, IWA Publishing, Vol. 47, No. S1 ( 2016-12-01), p. 1-7
    Abstract: Water and mass exchange between rivers and lakes are key processes that maintain the health of the ecology of river–lake systems. Alteration to river–lake interactions have great impacts on water and mass balances. Naturally connected to the middle Yangtze River are the Poyang Lake and Dongting Lake, which are the largest and the second largest freshwater lakes in China. The operation of the Three Gorges Dam (TGD) in the upper Yangtze River was found to have substantial impacts on the middle Yangtze river–lake system. In the past decade, unusual seasonal dryness was evident in the two lakes. Considerable deviations in lake water quality and wetland ecosystem were also detected. In order to explore and distinguish the causal factors influencing the river–lake system, the Ministry of Sciences and Technology (China) launched a research project in 2012, the National Basic Research Program of China (973 Program) (2012CB417000). This article provides an overview of advances in this research, including the evolution of the river–lake interactions, the impacts of the TGD, and the influences on lake hydrology, water quality, and ecosystem. The 20 papers in this issue deliver part of the research outcomes of this project.
    Type of Medium: Online Resource
    ISSN: 0029-1277 , 2224-7955
    URL: Article
    DOI: 10.2166/nh.2016.003
    Language: English
    Publisher: IWA Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 2411122-3
    detail.hit.zdb_id: 2142091-9
    SSG: 21,3
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Comparison of random forests and other statistical methods for the prediction of lake water level: a case study of the Poyang Lake in China
    IWA Publishing ; 2016
    In:  Hydrology Research Vol. 47, No. S1 ( 2016-12-01), p. 69-83
    Details
    In: Hydrology Research, IWA Publishing, Vol. 47, No. S1 ( 2016-12-01), p. 69-83
    Abstract: Modeling of hydrological time series is essential for sustainable development and management of lake water resources. This study aims to develop an efficient model for forecasting lake water level variations, exemplified by the Poyang Lake (China) case study. A random forests (RF) model was first applied and compared with artificial neural networks, support vector regression, and a linear model. Three scenarios were adopted to investigate the effect of time lag and previous water levels as model inputs for real-time forecasting. Variable importance was then analyzed to evaluate the influence of each predictor for water level variations. Results indicated that the RF model exhibits the best performance for daily forecasting in terms of root mean square error (RMSE) and coefficient of determination (R2). Moreover, the highest accuracy was achieved using discharge series at 4-day-ahead and the average water level over the previous week as model inputs, with an average RMSE of 0.25 m for five stations within the lake. In addition, the previous water level was the most efficient predictor for water level forecasting, followed by discharge from the Yangtze River. Based on the performance of the soft computing methods, RF can be calibrated to provide information or simulation scenarios for water management and decision-making.
    Type of Medium: Online Resource
    ISSN: 0029-1277 , 2224-7955
    URL: Article
    DOI: 10.2166/nh.2016.264
    Language: English
    Publisher: IWA Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 2411122-3
    detail.hit.zdb_id: 2142091-9
    SSG: 21,3
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Water quality control plan with BATHTUB model for lake inflow rivers – a case study of total phosphorus in Northwest Lake Taihu, China
    IWA Publishing ; 2019
    In:  Water Science and Technology Vol. 79, No. 3 ( 2019-02-01), p. 544-555
    Details
    In: Water Science and Technology, IWA Publishing, Vol. 79, No. 3 ( 2019-02-01), p. 544-555
    Abstract: Total phosphorus (TP) standards for lakes differ from those for rivers in GB3838-2002. This disjunction may lead to the failure of lake-water quality improvement plans that control nutrient inputs from inflow rivers. With monthly monitoring data for the period 2009–2015, Northwest Lake Taihu was regarded as a case study and the BATHTUB model was utilised to simulate the correspondence between concentrations of TP in the lake and in its inflow rivers. A control plan for TP in Northwest Lake Taihu's inflow rivers is proposed. To guarantee the fulfillment of the control goals of TP in the lake, concentration of TP in the inflow rivers of North Zone, Zhushan Bay, Meiliang Bay and Gonghu Bay should be reduced by 50%, 58%, 18% and 11%, respectively, and TP flux loads should be maintained under 227.35, 173.39, 113.69 and 90.62 ta−1, respectively. Meanwhile, total TP influxes from Northwest Lake Taihu should be maintained under 604.63 ta−1. A control plan that is more restrictive than GB3838-2002 should be proposed to address the TP pollution of the lake. This research provides the foundation for quantifying reduction of the nutrient loading from the catchment and for maintaining Lake Taihu and other typical eutrophic lakes.
    Type of Medium: Online Resource
    ISSN: 0273-1223 , 1996-9732
    URL: Article
    DOI: 10.2166/wcc.2018.201
    Language: English
    Publisher: IWA Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 764273-8
    detail.hit.zdb_id: 2024780-1
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...