Metabolomics analysis reveals the physiological mechanism underlying growth restriction in maize roots under continuous negative pressure and stable water supply

2022 ◽  
Vol 263 ◽  
pp. 107452
Author(s):  
Jili Zhang ◽  
Peng Wang ◽  
Huaiyu Long ◽  
Shanshan Su ◽  
Yige Wu ◽  
...  
Keyword(s):  
Water Supply ◽  
Negative Pressure ◽  
Physiological Mechanism ◽  
Growth Restriction ◽  
Maize Roots ◽  
Metabolomics Analysis

Investigation of the Impact of Anti-Negative Pressure Facility on a Water Distribution System

2013 ◽  
Vol 316-317 ◽  
pp. 719-722
Author(s):  
Huan Huan Wang ◽  
Shu Ming Liu ◽  
Fan Lin Meng ◽  
Lu Bai
Keyword(s):  
Water Supply ◽  
Negative Pressure ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Simulation Method ◽  
Water Tank ◽  
Research Activities ◽  
High Level ◽  
The Impact

High level water tank is a commonly used facility to satisfy water demand for people living in high building, which is also the so-called secondary water supply system (SWSS) in China. Due to lack of maintenance, water quality problem has been frequently reported in the SWSS. In the last few decades, anti-negative pressure facility (ANPF) has emerged as a revolutionary approach for solving the pollution in the SWSS. ANPF makes good use of the municipal pipeline pressure, which is the improvement of traditional water supply. However, most of recent research activities mainly focus on the influence of part of water distribution system (WDS). In this paper, the software of EPANET has been applied in the SWSS calculation and simulation. Besides that, the SWSS with ANPF simulation method is proposed to evaluate the effect of other all nodes pressure in the WDS using hydraulic model. As the cases study, the paper analyzed two WDSs with ANPF. After simulation of the SWSS, the result of WDS, which is smaller, indicates that 6 out of the 9 nodes are affected with ANPF and that of WDS, which is larger, demonstrates that 37 out of the 41 nodes are affected and the affected nodes are focused on the confluent of pipes, especially around the ANPF.

Study on Setting of One-Way Surge Tank in Long Water Supply Engineering

2008 ◽  
Author(s):  
Jianyong Hu ◽  
Jian Zhang ◽  
Weihua Lu ◽  
Shibo Ma
Keyword(s):  
Numerical Simulation ◽  
Theoretical Analysis ◽  
Water Supply ◽  
Negative Pressure ◽  
Water Hammer ◽  
Surge Tank ◽  
Proper Place ◽  
Column Separation ◽  
Important Measure ◽  
Engineering Principle

One-way surge tank is an important measure of water hammer protection in long water supply engineering. It can control the negative pressure efficiently and prevent pipeline from column separation. Setting one-way surge tank in proper place along pipeline is relative to the safety of long water supply engineering. Principle of Setting one-way surge tank is made through theoretical analysis detailedly. It is obviously that result of theoretical analysis is conservative because attenuation of water hammer is ignored, but theoretical analysis provide an proper approach for setting one-way surge tank. Based on result of theoretical analysis, optimization setting is obtained through numerical simulation.

scholarly journals Effects of different irrigation management parameters on cumulative water supply under negative pressure irrigation

2019 ◽  
Vol 224 ◽  
pp. 105743
Author(s):  
JiaJia Wang ◽  
HuaiYu Long ◽  
YuanFang Huang ◽  
XiangLing Wang ◽  
Bin Cai ◽  
...  
Keyword(s):  
Water Supply ◽  
Negative Pressure ◽  
Irrigation Management

Application of No-Negative-Pressure Variable Frequency Water-Supply System in Campus

2013 ◽  
Vol 671-674 ◽  
pp. 2567-2570
Author(s):  
Hong Yun Xing
Keyword(s):  
Water Supply ◽  
Water Consumption ◽  
Negative Pressure ◽  
Current Situation ◽  
Supply System ◽  
Water Supply System ◽  
Variable Frequency ◽  
Advantages And Disadvantages ◽  
Pressure Variable

The principle of no-negative-pressure variable frequency water-supply system and the current situation and characteristics of the water consumption in campus are analyzed, and at the same time, water-supply design precautions are put forward. With a example, the advantages and disadvantages of no-negative-pressure variable frequency water-supply system in campus are summarized. This paper holds this point that the system is suitable to be used in campus.

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