scholarly journals Current and Potential Future Bromide Loads from Coal-Fired Power Plants in the Allegheny River Basin and Their Effects on Downstream Concentrations

2016 ◽  
Vol 50 (17) ◽  
pp. 9078-9088 ◽  
Author(s):  
Kelly D. Good ◽  
Jeanne M. VanBriesen
Keyword(s):  
River Basin ◽  
Power Plants

scholarly journals Impact of Control Measures on Nitrogen Oxides, Sulfur Dioxide and Particulate Matter Emissions from Coal-Fired Power Plants in Anhui Province, China

Atmosphere ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 35 ◽  
Author(s):  
Haitao Dai ◽  
Dawei Ma ◽  
Renbin Zhu ◽  
Bowen Sun ◽  
Jun He
Keyword(s):  
Particulate Matter ◽  
Sulfur Dioxide ◽  
Nitrogen Oxides ◽  
River Basin ◽  
Power Plants ◽  
Air Pollutant ◽  
Control Measures ◽  
Pollutant Emissions ◽  
Huai River ◽  
The Impact

Anhui is one of the highest provincial emitters of air pollutants in China due to its large coal consumption in coal-fired plants. In this study, the total emissions of nitrogen oxides (NOx), sulfur dioxide (SO2) and particulate matter (PM) from coal-fired power plants in Anhui were investigated to assess the impact of control measures on the atmospheric emissions based upon continuous emission monitoring systems (CEMS). The total NOx, SO2 and PM emissions significantly decreased from 2013 to 2017 and they were estimated at 24.5 kt, 14.8 kt and 3.0 kt in 2017, respectively. The emission reductions of approximately 79.0%, 70.1% and 81.2% were achieved in 2017 compared with a 2013 baseline, respectively, due to the application of high-efficiency emission control measures, including the desulfurization, denitration and dust-removing devices and selective catalytic reduction (SCR). The NOx, SO2 and PM emission intensities were 0.125 g kWh−1, 0.076 g kWh−1 and 0.015 g kWh−1 in 2017, respectively, which were lower than the average of national coal-fired units. The coal-fired units with ≥600 MW generated 80.6% of the total electricity amount while they were estimated to account for 70.5% of total NOx, 70.1% of total SO2 and 71.9% of total PM. Their seasonal emissions showed a significant correlation to the power generation with the maximum correlation found in summer (July and August) and winter (January and December). The major regional contributors are the cities along the Huai River Basin and Yangtze River Basin, such as Huainan, Huaibei, Tongling, Maanshan and Wuhu, and the highest emission occurred in Huainan, accounting for approximately 26–40% of total emission from all the power plants. Our results indicated that the application of desulfurization, denitration and dust-removing devices has played an important role in controlling air pollutant emissions from coal-fired power plants.

scholarly journals Evaluation of upper Uruguay river basin (Brazil) operational flood forecasts

RBRH ◽  
2017 ◽  
Vol 22 (0) ◽  
Author(s):  
Fernando Mainardi Fan ◽  
Paulo Rógenes Monteiro Pontes ◽  
Diogo Costa Buarque ◽  
Walter Collischonn
Keyword(s):  
River Basin ◽  
Power Plants ◽  
Performance Metrics ◽  
Hydroelectric Power ◽  
Rainfall Runoff ◽  
Runoff Modeling ◽  
Forecasting System ◽  
The Difference ◽  
And Performance ◽  
Uruguay River

ABSTRACT System for hydrological forecasting and alert running in an operational way are important tools for floods impacts reduction. The present study describes the development and results evaluation of an operational discharge forecasting system of the upper Uruguay River basin, sited in Southern Brazil. Developed system was operated every day to provide experimental forecasts with special interest for Barra Grande and Campos Novos hydroelectric power plants reservoirs inflow, with 10 days in advance. We present results of inflow forecasted for floods occurred between July 2013 to July 2016, the period which the system was operated. Forecasts results by visual and performance metrics analysis showed a good fit with observations in most cases, with possibility of floods occurrence being well predicted with antecedence of 2 to 3 days. Comparing the locations, it was noted that the sub-basin of Campos Novos, being slower in rainfall-runoff transformation, is easier forecasted. The difference in predictability between the two basins can be observed by the coefficient of persistence, which is positive from 12h in Barra Grande and from 24h to Campos Novos. These coefficient values also show the value of the rainfall-runoff modeling for forecast horizons of more than one day in the basins.

scholarly journals Abundance of Natural Trout Stocks, Interactıon of Antropogenıc Processes and Hyro Power Plants in the River Basin of Rize City

2016 ◽  
Vol 1 (2) ◽  
pp. 56-63
Author(s):  
BÜLENT VEREP ◽  
DAVUT TURAN ◽  
SABRİ BİLGİN ◽  
ERTUĞRUL TERZİ ◽  
CÜNEYT KAYA ◽  
...  
Keyword(s):  
River Basin ◽  
Power Plants

Monthly streamflow reconstruction for the Chao Phraya River Basin with tree rings and δ180

2021 ◽  
Author(s):  
Hung Nguyen ◽  
Stefano Galelli ◽  
Chenxi Xu ◽  
Brendan Buckley
Keyword(s):  
Water Management ◽  
River Basin ◽  
Tree Rings ◽  
Power Plants ◽  
Reconstruction Method ◽  
Management Decisions ◽  
Time Step ◽  
Monthly Streamflow ◽  
Chao Phraya River

<p>The Chao Phraya River Basin covers a third of Thailand’s area and is also home to a third of the country’s population. The Chao Phraya River serves multiple purposes: water supply, irrigation, hydropower production, cooling for thermoelectric power plants, among others. Water management in the basin could benefit from long term streamflow records that extend beyond the instrumental period. But to acquire practical relevance, streamflow reconstructions should have a sub-annual resolution—in line with the time step characterizing water management decisions. To this end, we reconstruct 253 years of monthly streamflow at all four major tributaries (Ping, Nan, Yon, and Wang) of the Chao Phraya. The reconstructions are developed using a network of tree rings and δ<sup>18</sup>0 chronologies in Southeast Asia. Importantly, our reconstruction method ensures that the total monthly flow matches the annual flow closely. This mass balance criterion is necessary to avoid misguiding water management decisions, such as the allocation of water rights. All reconstructions are skillful. Better skills are obtained in the pre-monsoon months (March to May) than in the peak monsoon season (September, October). Overall, this work presents the most comprehensive record of high resolution and long term streamflow variability in the basin.</p>

PERSPECTIVES OF THE USAGE OF HYDROPOWER POTENTIAL OF THE RIVERS OF THE DNIPRO RIVER BASIN (ON THE EXAMPLE OF THE ROS RIVER)

2019 ◽  
pp. 56-62 ◽  
Author(s):  
O. Obodovskiy ◽  
V. Onischuk ◽  
O. Pochaievets
Keyword(s):  
Electromagnetic Field ◽  
River Basin ◽  
Power Plants ◽  
Hydroelectric Power ◽  
Operating Characteristics ◽  
Water Object ◽  
Technological Approach ◽  
Hydropower Potential ◽  
Hydroelectric Power Plants ◽  
High Level

A new scientific and technological approach concerning the high level of ecological usage of hydropower potential of rivers in the Dnipro river basin is presented. The constructive and layout solutions for the declared small high-ecological hydroelectric power plants are presented. Examples of hydraulic calculation of pressure derivation are given and the power of a hydroelectric power plant is determined taking into account the effect of an additional electromagnetic field on its individual working bodies. The Ros is taken as the pilot river, which shows the locations of universal small high-ecological hydroelectric power stations and their main operating characteristics. In addition, recommendations are made regarding the rational allocation of hydroelectric power plants, taking into account the type of channel. The scientific novelty of the new technological approach is the use of an additional local electromagnetic field at the end of the pressure pipeline at a section length of at least 10 m, on the nozzle and on the turbine. The presence of an electromagnetic field around the turbine and generator enables the stations to operate at significant speeds (from 600 to 16 thousand revolutions per minute). In addition, in the background of the electromagnetic field, due to the absence of friction in the bearings, the life of turbines and generators increases. The universality of new hydroelectric power plants is explained by the fact that such stations can be used on any water facility (mountain or plain river, lake, reservoir or near the reservoir). The technical and economic efficiency of high-ecological hydroelectric power plants is assessed by the high level of environmental safety of the water object, the cost-effectiveness of construction and the achieved level of safety during flood passage, which is achieved by minimal interference and water use of the water object. In addition, the work of the station is effective at the minimum volume of water drain on any part of the river, almost without violating the hydroecological parameters of the water object. Comparative analysis of the estimated cost of a small hydroelectric power station near the village is presented.

Value of Reservoir Storage for Resilient Power Plant Cooling and Basin-Wide Water Availability

2012 ◽  
Author(s):  
Ashlynn S. Stillwell ◽  
Michael E. Webber
Keyword(s):  
Power Plant ◽  
River Basin ◽  
Water Availability ◽  
Power Plants ◽  
Colorado River ◽  
Water Storage ◽  
River Basins ◽  
Reservoir Storage ◽  
Thermoelectric Power Plants ◽  
Power Plant Cooling

Since many thermoelectric power plants use water for cooling, the power sector is vulnerable to droughts, heat waves, and other water constraints. At the same time, large water demands for power generation can strain water availability for other users in a river basin. Opportunities exist for power plants to decrease freshwater demands, increasing both drought resiliency of power plants and water availability for other users in the basin. One particular method of decreasing freshwater demands for power plants is by incorporating reservoir storage into cooling operations. Using reservoir storage allows water to be recirculated and reused for power plant cooling, thereby decreasing water withdrawal requirements. Water storage also has the added benefit of making water available during times of shortage. While storage is known to be beneficial, no tools exist to explicitly quantify the basin-wide water availability impacts and increased power generation resiliency possible via constructing water storage at thermoelectric power plants without existing reservoirs. Here we present the results of modeling efforts regarding the value (both in terms of resiliency and water availability) of reservoir storage for power plant cooling and basin-wide water availability in the Brazos and Colorado River basins, using a customized river basin based-model along with existing Texas Water Availability Models. Results vary between river basins and different water availability models, with construction of new reservoirs generally increasing basin-wide water availability in the Brazos River basin and generally decreasing basin-wide water availability in the Colorado River basin. We conclude that the value of reservoir storage for power plant resiliency and basin-wide water availability is highly site-specific.

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