scholarly journals Study on Water Exchange and Water Quality Simulation of Macao Airport Expansion Project

2021 ◽  
Vol 261 ◽  
pp. 03019
Author(s):  
Huang Pengfei ◽  
Liu Pei ◽  
Xu Wei
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Exchange Rate ◽  
Water Exchange ◽  
Exchange Capacity ◽  
Two Dimensional ◽  
Water Exchange Rate ◽  
Water Quality Simulation ◽  
Significant Difference ◽  
Better Than

In this paper, we analyzed the current situation of water pollution sources near Macao airport, established a two-dimensional water exchange and water quality mathematical model near the project, and compared and simulated the reclamation schemes of Macao airport. According to the results of water exchange and COD calculation of water quality, the 80 m channel scheme was remarkably better than the 40 m one in terms of water exchange capacity and the possibility of achieving the water quality target. However, with the increase of channel width, the variation of water exchange rate and half exchange period would slow down. There was no significant difference in water exchange rate, water exchange period and water quality distribution between 80m channel and 120 m channel. The final scheme was to adopt the 80 m channel.

A modeling study of the impact of increasing water exchange rate on water quality of a semi-enclosed bay

2019 ◽  
Vol 136 ◽  
pp. 177-184 ◽  
Author(s):  
Mohammad Hassan Ranjbar ◽  
Majid Jandaghi Alaee ◽  
Mostafa Nazarali
Keyword(s):  
Water Quality ◽  
Exchange Rate ◽  
Water Exchange ◽  
Water Exchange Rate ◽  
Enclosed Bay ◽  
The Impact ◽  
Modeling Study

Simulation of the Changes of Flow Fields by Ecological Islands in Wohushan Reservoir

2013 ◽  
Vol 405-408 ◽  
pp. 2190-2193
Author(s):  
Ming Hui Niu ◽  
Zheng He Xu ◽  
Ke Kong
Keyword(s):  
Water Quality ◽  
Exchange Rate ◽  
Recovery Time ◽  
Water Exchange ◽  
Vertical Direction ◽  
Quality Model ◽  
Water Exchange Rate ◽  
Before And After ◽  
Speed Up ◽  
Field Velocity

Based on the MIKE21 software, the water quality model to simulate flow field, velocity, and proliferation of pollutants before and after ecological islands is established in Wohushan Reservoir. It consists of mass equations and momentum equations. The results indicate ecological islands can ease the phenomenon of reservoir circulation and speed up the water exchange rate in the vertical direction that shortens the recovery time of water. The study provides a strong guarantee for water resources regulation, management and protection of Wohushan Reservoir.

scholarly journals The Direction-Dependence of Apparent Water Exchange Rate in Human White Matter

NeuroImage ◽  
2021 ◽  
pp. 118831
Author(s):  
Zhaoqing Li ◽  
Zhenfeng Pang ◽  
Juange Cheng ◽  
Yi-Cheng Hsu ◽  
Yi Sun ◽  
...  
Keyword(s):  
Exchange Rate ◽  
White Matter ◽  
Water Exchange ◽  
Water Exchange Rate ◽  
Direction Dependence

Accelerating water exchange in GdIII–DO3A-derivatives by favouring the dissociative mechanism through hydrogen bonding

2019 ◽  
Vol 55 (4) ◽  
pp. 513-516 ◽  
Author(s):  
Loredana Leone ◽  
David Esteban-Gómez ◽  
Carlos Platas-Iglesias ◽  
Marco Milanesio ◽  
Lorenzo Tei
Keyword(s):  
Hydrogen Bonding ◽  
Exchange Rate ◽  
Water Exchange ◽  
Exchange Mechanism ◽  
Water Molecules ◽  
Dissociative Mechanism ◽  
Water Exchange Rate ◽  
Order Of Magnitude

The water exchange rate in GdIII-complexes increases by one order of magnitude due to H-bonding between the phenol(ate) group and the water molecules involved in the dissociative exchange mechanism.

Cloud Simulation Platform for Water Environment Assessment

2013 ◽  
Vol 316-317 ◽  
pp. 670-673 ◽  
Author(s):  
Xiao Fan Ge ◽  
Di Bo Hou ◽  
Guang Xin Zhang ◽  
Ping Jie Huang
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Water Environment ◽  
Water Quality Assessment ◽  
C Language ◽  
Water Quality Simulation ◽  
Environment Assessment ◽  
Computing Framework ◽  
Water Simulation ◽  
Saas Cloud

In this paper, a platform based on SaaS cloud computing framework is developed to provide professional online cloud simulation service for water quality assessment. The DLL, WINDOWS MFC programming methods are investigated and water pollution remote simulation can be performed supported by different water simulation softwares including MATLAB, MIKE and FLUENT. The C# language is used in our programming. The major steps of establishing a water quality simulation model using FLUENT and MATLAB are introduced.

Unexpectedly Large Change of Water Exchange Rate and Mechanism on [Ln(DTPA-BMA)(H2O)] Complexes along the Lanthanide(III) Series

1995 ◽  
Vol 34 (17) ◽  
pp. 4447-4453 ◽  
Author(s):  
Dirk Pubanz ◽  
Gabriel Gonzalez ◽  
D. Hugh Powell ◽  
Andre E. Merbach
Keyword(s):  
Exchange Rate ◽  
Water Exchange ◽  
Large Change ◽  
Water Exchange Rate

scholarly journals Electronic Effects of the Substituents on Relaxometric and CEST Behaviour of Ln(III)-DOTA-Tetraanilides

Inorganics ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 43
Author(s):  
Valeria Lagostina ◽  
Loredana Leone ◽  
Fabio Carniato ◽  
Giuseppe Digilio ◽  
Lorenzo Tei ◽  
...  
Keyword(s):  
Exchange Rate ◽  
Water Exchange ◽  
Chemical Exchange ◽  
Chemical Exchange Saturation Transfer ◽  
Saturation Transfer ◽  
Electronic Effects ◽  
17O Nmr ◽  
Water Exchange Rate ◽  
Coordinated Water ◽  
The Eu

Three different 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetamide (DOTAM) derivatives bearing as amide N-substituents phenyl, p-methoxyphenyl and p-ethylbenzoate groups were synthesized and the 1H and 17O NMR relaxometric behaviour of the Gd(III)-chelates and chemical exchange saturation transfer (CEST) effect of the Eu(III) complexes were evaluated. The electronic properties of the substituents were shown to strongly influence the coordinated water exchange rate (kex), resulting in five times faster kex for the electron donating phenylmethoxy group compared to the electron withdrawing ethylbenzoate group.

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