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When welding under the water, there are high-pressure gas flowing in the pipeline and water flowing outside, causing a difficult and possibly risky of the welding operation.
Water pressure has a certain compression on arc welding, and the water has a strong cooling effect on the welded joints.
As the professional finite element numerical simulation software in welding field, SYSWELD has advantages that the general characters are very strong, but the specificity is its shortcoming [12-14].
Fig. 5 shows the thermal cycling curve of the nodes investigated in land in-service welding and under-water welding in different water velocities.
a) Inner wall b) Outer wall Fig. 7 Effect of water velocity on the stress distribution of the inner and outer wall Fig. 7 shows the effect of water velocity on the stress distribution of the inner and outer wall.

Modeling and by professional software can greatly increase efficiency.
[3] Gao Hong,Lin Wanlai, Du Zhaohui.Numerical flow and performance analysis of a water-jet axial flow pump[J].

The second layer is included Water Resources, Environmental Protection Administration, Jiangsu, Zhejiang, Shanghai, Taihu Lake, including the provincial and ministerial level and professional coordinating agency primarily responsible for the province as well as coordination of the work day. 
Table 1 Classification Taihu Lake Basin water users Relationship Category Concentration Usury Victimizers Feature Rural water retail Domestic water Irrigation water Fishery water Sewage The large number of moderately affected impose a lesser extent, the basic no voice Urban retail water Domestic water Sewage The large number of moderately affected impose a lesser extent, the basic no voice Network production water users Production water Production of sewage Larger number of moderately affected, moderately influence, basically no voice Independent production water users Production water Production of sewage Larger number of moderately affected, a higher degree of influence, have some say Water user groups for analysis can be found, water companies and sewage treatment plant are two important impacts on water resource transfer role, it is necessary to further analyze these two roles in water resources management influence. 
Therefore, water companies and sewage treatment plant is difficult to become the spokesman for water users, water users and their closer relationship between management rather than dealing in the interests of endorsements, such as sewage treatment plants and water companies and water users in the question about the price of water , whose interests more adversarial based. 
Water contamination in the interests of water users, resulting in damage occurred, the water company is difficult to become spokesmen for the interests of water users and advocates appeal, in another aspect, the sewage treatment plant is also difficult for sewage water users’ behavior management. 
The overall planning of water resources, water administration and management, water conservancy facilities management, etc.

The collapse is located in the foot of the hillside, where the ground-water collects easily.
By the influence of the ground-water, the mixed backfilled soil layer slides along the face of collapsible loess layer towards the direction of the oblique posterior.
The ground surface of collapse section is located at the slope foot, where the collected water results in the strength declination of the collapsible loess.
It can be inferred that water is the indirect factor which leads to the collapse.
[4] The Professional Standards Compile Group of People s Republic of China.

Secondly, taking the buildings of Shantou University’s “Engineering Institute, CDIO innovation center” as an example and combining BIM(Building Information Modeling) with green building come up with every green reform strategy we will use to reach the purpose that changing the current building into a kind of better building which is water-saving, electricity-saving, ventilation and heat protection.
Each department of green reform strategy in the building Through the above green reform strategy, we will obtain good results in the aspects such as saving water and electricity, ventilation and heat protection.
The Green Reform Strategy for Water.
These strategies can achieve the purpose of saving water.
In the design process, each professional engineer such as architectural engineer, structural engineer and HVAC engineer all can use the designed model to design, in order to achieve the purpose of solving conflicts in design phase.

Fortunately, there were no risks of Mn and Cu in both water column and sediment.
Water characterization: Measured parameters of water were in normal range.
Metal contamination in water Manganese; Mn concentrations in water column were shown in normal levels.
Heavy metals in soils, London: Blackie Academic and Professional. (1995) [3] Maria, R.
Masoud, Distribution of some metal concentration in water and sediment of Lake Edku Egypt.

Integrated water management aims to promote water supply from conventional resources and wastewater reuse to address issues such as water scarcity.
This name is GW because it combines pure water with water used.
It is produced by bathing in the bathtub, washing machine water in homes, and washing the water from the main tanks.
This means that the result of all daily water uses in our homes, except for water contaminated with human waste, which is toilet water, is characterized by GW as semi-pure water because it is clean water originally mixed with washing.
· BOD: Assessed to evaluate the organic load reduction, using HI-98193 Professional Waterproof Dissolved Oxygen and BOD Meter, has extended ranges of up to 50 ppm and 600% saturation, Hanna Instruments Ltd, Eden Way, Pages Industrial Park, Leighton Buzzard, UK

China energy Research Society of Geothermal Professional Committee is discussing about " Chinese hot dry rock geothermal resources potential research " with a Australian .
Hot dry rock development restrictions on water resources Per capita water resources (excluding transit water) of 16 provinces in China are below the line of severe water shortages, six provinces’ or autonomous regions’ (Ningxia, Hebei, Shandong, Henan, Shanxi, Jiangsu) per capita water less than 500 cubic meters, where is extremely dry areas.
However, there is a problem of itself, no matter what kind of fracturing, thousands tons water are need, especially in the popular slick water fracking.
Meanwhile, chemically sustained water will permeate into fields influence underground water quality; on the other hand, water pump out for the well has another deposal problem.
(3) Considering of the unique situation of water shortage in China, making an actual important consideration on water resources conservation and rational use in planning and development of water resources conservation and rational use is considerably essential.

It greatly consumes the dissolved oxygen in water body, brings eutrophication and inhibits from the wastewater biodegrading.
From this study, we wish to develop the new process of reuse the wastewater, this work is also highly important to conserve water resource, and then to alleviate the shortage of water resources.
The results showed that the effluent was in compliance with the water quality standard of GBT 18920-2002 for miscellaneous use.
References [1] Cheng Yi, Zhao Yiwen, The state of train laundry wastewater pollution and discharge, Environment and professional medical, Vol.8(4) (2002), p. 257-258 [2] Takada H , Ishiwatari R , Ogura N.
[3] Li Ling, Train laundry wastewater treatment and reuse engineering design, China water & wastewater, Vol.16(4)( 2000), p.34-36 [4]Chinese EPA: Water and Wastewater Monitoring Methods ( Chinese Environmental Science Publishing House, China 1997) [5] Chen Lie, Zhou Xingqiu, Wu jiandong, Harmfulness of surfactant wastewater and its treatment techniques, Industrial water treatment, Vol.23(10) (2003), p.12-16 [6] R.

And the relation between the hoop strain in the tested pipe and the internal water pressure is given according to the experiments.
At first, the hydraulic pump catheter with side inlet connected to model, and let model is filled with water.
The yield deformation of inner water pressure about steel tube is 3.4MPa.Packaged one layer ofcarbon fiber sheet and packaged two layers of carbon fiber sheets in internal water pressure up to 3.7MPa and 4.0MPa have yield deformation.
Therefore, It must be familiar with the reinforcement technology professional team to make construction and operation, in order to ensure the quality of paste.