scholarly journals Enhanced Coagulation for the Different Mixture Ratio Raw Water of Yellow River Water and South-to-North Water Diversion Water

2018 ◽  
Vol 178 ◽  
pp. 012010 ◽  
Author(s):  
Jianhong Lu ◽  
Jin Zhang ◽  
Feng Yin
Keyword(s):  
River Water ◽  
Yellow River ◽  
Water Diversion ◽  
Raw Water ◽  
Mixture Ratio ◽  
Enhanced Coagulation ◽  
North Water

Main Engineering Geological Problems and Evaluation on the Reservoir Engineering of Yellow River Water Diversion and Irrigation Area

2014 ◽  
Vol 580-583 ◽  
pp. 2071-2073
Author(s):  
Zhi Quan Huang ◽  
Tai Li Chen ◽  
An Ming Wang
Keyword(s):  
River Water ◽  
Engineering Geology ◽  
Yellow River ◽  
Water Diversion ◽  
Reservoir Engineering ◽  
Water Leakage ◽  
Irrigation Area ◽  
Reservoir Area ◽  
Reservoir Siltation

Engineering geology survey was carried out on the reservoir engineering of Yellow River water diversion and irrigation area, main engineering geology problem including leakage problem of reservoir area、shore stable and siltation problem around the reservoir、siltation problem of storehouse district, connected the river course and the pilot, water leakage river course、earthquake liquefication and immerse and salinification were analyzed and appraised, the corresponding project measure was proposed against the infiltrates of the storehouse district.

Risk Analysis and Control in the Yellow River-Crossing Tunnel of South-to-North Water Diversion East Line

2013 ◽  
Vol 357-360 ◽  
pp. 2655-2658
Author(s):  
Bo Liu ◽  
You Zhi Wang ◽  
Meng Ting Niu
Keyword(s):  
Risk Management ◽  
Life Cycle ◽  
Risk Analysis ◽  
Yellow River ◽  
Water Diversion ◽  
Good Effect ◽  
The Yellow River ◽  
North Water ◽  
Construction Operation ◽  
And Control

The life-cycle of the Yellow River-crossing tunnel is divided into six stages, including planning, design, bidding, construction, operation,maintenance, and disposal. To ensure the safety of the tunnel during various stages, the concept of life-cycle risk management is introduced. The article identified the risks in all stages and proposed corresponding measures for risk controlling, some of which were already applied in the project and achieved good effect.

scholarly journals Study of PFS and PAC coagulation effect on Pi River water

2021 ◽  
Vol 272 ◽  
pp. 01012
Author(s):  
Wan-Fen Wang
Keyword(s):  
Water Sample ◽  
River Water ◽  
Removal Efficiency ◽  
Aluminum Chloride ◽  
Ph Value ◽  
Removal Rate ◽  
Raw Water ◽  
Mass Ratio ◽  
Enhanced Coagulation ◽  
Better Than

Using poly-aluminum chloride (PAC) and poly-ferric sulfate (PFS) as coagulants, the effects of the dosage of PAC and PFS on the removal of turbidity, chromaticity and UV254* in water were investigated by using the method of enhanced coagulation. The results show that when the raw water is neutral and the turbidity is less than 20NTU, and the pH value does not decrease much after coagulation and sedimentation, PAC and PFS are separately added to 7.5mg/l, 35mg/l. The removal rate of turbidity and chromaticity in the water sample can reach 83.75% and 48.47%, respectively, but the removal rate of UV254* is less than 30%, the mass ratio of PAC to PFS is 1:1 to 6:1, the removal efficiency of turbidity and Chroma increased by about 10%, but the removal efficiency of UV254* did not change or even decreased, both PFS and PAC can effectively remove the turbidity and Chroma in the micro polluted Pi River, but the removal effect of UV254* is not good, and the removal effect of PAC is better than PFS.

The Application of Compaction Sand Pile in the Yellow River-Crossing Project for South-to-North Water Diversion

2012 ◽  
Vol 226-228 ◽  
pp. 1396-1400
Author(s):  
Qi Xia Liu ◽  
Yang Bai
Keyword(s):  
Bearing Capacity ◽  
Yellow River ◽  
Fine Sand ◽  
Soil Liquefaction ◽  
Silty Sand ◽  
Water Diversion ◽  
Construction Technology ◽  
Foundation Soil ◽  
Sand Liquefaction ◽  
North Water

In the construction of Yellow River-Crossing Project for the Middle Route of the South-to-North Water Transfer, the silt, silty sand and fine sand widely exist in the foundation, that it need to be processed in the region where the possibility of sand liquefaction because of the low bearing capacity. We had a detailed study and experiment for the sand compaction pile of the axis and the outside of the channel, and determined the compactness of pile body, pile length and the construction technology through the test. We also debugged the concrete construction parameters such as the amount of filling sand and stone, hoisting height and speed, extrusion times and so on. For these experiments, we attained the purpose of increasing the relative density, preventing sandy soil liquefaction, improving the shear strength of the foundation soil and the bearing capacity of the foundation, so as to reduce the foundation settlement.

The Impact of Irrigation Diverting from Yellow River Water on Regional Water Cycle in Shandong Province

2012 ◽  
Vol 212-213 ◽  
pp. 514-517 ◽  
Author(s):  
Shi Song Qu ◽  
Zhong Zhu Zhu ◽  
Ning Qiu ◽  
Wei Ping Wang
Keyword(s):  
River Water ◽  
Groundwater Level ◽  
Surface Runoff ◽  
Water Cycle ◽  
Yellow River ◽  
Shandong Province ◽  
Water Diversion ◽  
Runoff Coefficient ◽  
The Impact ◽  
Regional Water

Yellow River water diversion is an effective way to alleviate agricultural irrigation water shortage and promote agricultural production around Shandong Yellow River diversion area. It also plays a role in improving regional water cycle, including effects on evaporation, precipitation, surface runoff coefficient, and groundwater level of intake area. The paper studied the development of Yellow River water diversion in Shandong province, and qualitatively analysized the impact on the regional temperature, evaporation. And then the surface runoff coefficient and groundwater level before and after large-scale diversion in the area were quantitatively analysized. The results show that irrigation diversion from Yellow River can increase surface runoff coefficient and groundwater level, bring an enormous benefit to eco-environment, and provide an irreplaceable support role of the sustainable socio-economic development in Shandong province.

Removal of Organics from Huangpu River Water by Different Coagulants

2010 ◽  
Vol 113-116 ◽  
pp. 1128-1131
Author(s):  
Cheng Liu ◽  
Wei Chen ◽  
Nai Yuan Gao
Keyword(s):  
River Water ◽  
Aluminum Sulfate ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Raw Water ◽  
Ferrous Chloride ◽  
Enhanced Coagulation ◽  
Jar Test ◽  
Chlorine Demand ◽  
Huangpu River ◽  
Optimal Ph

Jar-test experiments were performed to investigate the effectiveness of enhanced coagulation in organic removal from Huangpu river water. The results show that，For Huangpu river water, the suitable type of coagulant is ferrous chloride; the optimal pH for the removal of organics is 5.5, and the dose of FeCl3 is 30mg•L-1, at which the removal effect of the DOC ,UV254 are 42% ,56% and 60% respectively; As a matter of fact, ferric chloride and aluminum sulfate have similar removal effect to organics at ambient pH, while can gain higher efficiency at pH 5.5, (higher 12% DOC and 20% UV254), we can conclude that the main mechanism for coagulation to remove organics is the reactions between coagulants hydrolysis species and organics; Seen from the result of UV scan, the enhanced coagulation remove mainly the organics which can be adsorbed by the UV whose wavelength higher than 250 nm, which is mainly aromatic compounds and polynuclear aromatic hydrocarbons; Enhanced coagulation can reduce the chlorine demand of the raw water effectively, for it can remove the organics which can adsorbed by the UV at 272nm.

Risk Analysis during Departure and Reception of Shield in the Yellow River Crossing Tunnel of the Middle Route Project of South-to-North Water Diversion

2011 ◽  
Vol 90-93 ◽  
pp. 2125-2130
Author(s):  
Zhi Lin Dun ◽  
Yang Cao ◽  
Lian Wei Ren
Keyword(s):  
Evaluation Method ◽  
Large Deviation ◽  
Yellow River ◽  
Reference Value ◽  
Fuzzy Comprehensive Evaluation ◽  
Water Diversion ◽  
The Yellow River ◽  
Mechanical Equipment ◽  
Geological Conditions ◽  
North Water

In the Yellow River crossing tunnel of the middle route project of South-to-North water diversion, its geological conditions are very complicated, so potential risks are much likely to occur in the construction. Based on the fault tree analysis, fuzzy comprehensive evaluation method is also used for the quantitative analysis on the risks during the departure and reception phase of the tunnel construction. And it turns out that, there are risks of collapse of working well, leakage and plasma leakage, mechanical equipment failure and large deviation from the designed axis during the construction. Finally, the measures available of risk aversion are put forward, which have achieved good field applications and also provided some reference value for similar projects in the future construction.

Application of Pre-Grouting Technique in Yellow River Crossing Tunnel in Eastern Route of South to North Water Transfer Project

2012 ◽  
Vol 430-432 ◽  
pp. 1133-1136
Author(s):  
Xiao Yan Wang ◽  
Shi Wei Duan ◽  
Xian E Xu ◽  
Hao Liang Wang
Keyword(s):  
River Water ◽  
Pore Water ◽  
Yellow River ◽  
Water Transfer ◽  
The Yellow River ◽  
Quaternary Deposits ◽  
Blasting Excavation ◽  
North Water ◽  
Fissure Water

The yellow river crossing tunnel runs through limestone at a depth of about 70m below the level of yellow river. Since the river water, phreatic pore water in loose Quaternary deposits and karst/fissure water in limestone communicates with each other, pre-grouting technique has to be employed before drilling and blasting excavation of the tunnel.

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