Results 91 to 100 of about 5,560 (220)

Study on Nutrient Dynamics and Ecological Process in a Subtropical Reservoir [PDF]

, 2016
由于梯级电站大量开发，河流湖库化和富营养化问题突出，但有关库区营养盐动态和生态过程缺乏系统性研究。本文以九龙江北溪西陂水库为研究对象，开展入库河流和水库的综合观测，从时、日、月、季节多个时间尺度捕捉营养盐和生态参数的变化，分析水库营养盐和浮游植物的季节转换模式、暴雨事件生态响应过程和机制，总结季风气候条件下亚热带不同水库营养盐和生态特征。主要研究结论如下： （1）西陂水库营养盐在干湿季节过渡期，NH4-N、DRP的相对富集和水温升高导致叶绿素a出现峰值。水库汇水与水面面积比值高达7285 ...
莫琼利
core  

Optimizing Automatic Voltage Control Collaborative Responses in Chain-Structured Cascade Hydroelectric Power Plants Using Sensitivity Analysis

Energies
Southwestern China has abundant hydropower networks, wherein neighboring cascade hydropower stations within the same river basin are typically connected to the power system in a chain-structured configuration.
Li Zhang, Jie Yang, Jun Wang, Lening Wang, Haiming Niu, Xiaobing Liu, Simon X. Yang, Kun Yang   +7 more
doaj   +1 more source

An Optimization Method for Day-Ahead Generation Interval of Cascade Hydropower Adapting to Multi-Source Coordinated Scheduling Requirements

Energies
Multi-source coordinated scheduling has become the predominant operational paradigm in power systems. However, substantial differences among hydropower, thermal power, wind power, and photovoltaic sources in terms of response speed, regulation capability,
Shushan Li, Chonghao Li, Huijun Wu, Zhipeng Zhao, Huan Wang, Yongxi Kang, Chuntian Cheng, Changhong Li   +7 more
doaj   +1 more source

Short-term peak shaving model of cascade hybrid pumped storage hydropower station retrofitted from conventional hydropower

International Journal of Electrical Power & Energy Systems
The integration of pumped storage units with conventional cascade hydropower to form a cascade hybrid pumped storage hydropower station (CHPHPS) is considered one of the effective approaches to expedite the development of pumped storage.
Bin Luo, Xinyu Liu, Yongcan Chen, Can Zhou, Xin Long   +4 more
doaj   +1 more source

Role of hydraulic residence time in shaping phytoplankton community assembly in the upper yellow river cascade reservoirs

Frontiers in Environmental Science
Introduction: Cascade hydropower development significantly alters the structure and function of river ecosystems. Phytoplankton, as primary producers, are highly sensitive to environmental changes, and their diversity and community structure reflect the ...
Qiyong Luo, Qiyong Luo, Linyu Zhu, Daikui Li, Zhigang Zu, Zhigang Zu, Kebin Chen, Jia Wang, Yujun Yi, Yujun Yi, Yujun Yi   +10 more
doaj   +1 more source

Water discharge and sediment flux changes in the Lower Mekong River

, 2005
International audienceThe Lower Mekong River has witnessed extremely low water levels over the past few years. There is speculation that the changes are a consequence of the construction and operation of the Chinese cascade dams in the upper part of the ...
Lu, X. X., Siew, R. Y.
core   +1 more source

Energy Security, Poverty and Vulnerability in Central Asia and the Wider European Neighbourhood [PDF]

This paper seeks to disaggregate concerns about energy security within the wider European neighborhood from the nation-state to the household, and particularly to poor households in the transition and developing economies of the former Soviet Union.
Ben Slay
core  

Short-term Optimal Scheduling Model for Hydropower Stations Considering Peak Shaving of Local and HVDC Receiving Power Grids

Renmin Zhujiang
In the face of the increasingly severe peak shaving pressure on both sending and receiving power grids of the high voltage direct current (HVDC) of large-scale hydropower stations,a short-term optimal scheduling model that takes into account peak shaving
ZHOU Binbin, ZHANG Congtong, LIU Benxi, CHENG Chuntian, CHEN Kai, WANG Youxiang   +5 more
doaj  

Inventory of water storage types in the Blue Nile and Volta River Basins [PDF]

Water storage / River basins / Reservoirs / Ponds / Tanks / Groundwater / Soil moisture ...
Johnston, Robyn M., McCartney, Matthew
core  

Quantifying the effects of future environmental changes on water supply and hydropower generation benefits of cascade reservoirs in the Yellow River Basin within the framework of reservoir water supply and demand uncertainty

Journal of Hydrology: Regional Studies
Inflow and water demand prediction plays an important role in reservoir operation rulemaking. Uncertainties in meteorological and hydrological modeling increase the complexity of inflow and water demand prediction, which are not sufficiently considered ...
Shuai Zhou, Yimin Wang, Jianxia Chang, Hui Su, Qiang Huang, Ziyan Li   +5 more
doaj   +1 more source