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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.

“A low water/cement ratio is also important; it reduces both the penetration of ions into surface layer of concrete and the water absorption of this layer.”
If water is kept on a steel smoother as on just washed glass, local increased water ratio has destroying effect on the quality of surface layer.
The modification is not relevant as site performance, but according to the opinion of interested professional community the modification with saw stir of steel ruler is representative and does not increase or decrease the result of deicing salt scaling resistance.
RESULTS Set A – water-tightness 25mm, 28 day strength 48,6 MPa with bulk density 2295 kg/m3 Set B - water-tightness 20 mm, 28 day strength 34,9 MPa with bulk density 2190 kg/m3 Set C - water-tightness 17 mm, 28 day strength 36,1 MPa with bulk density 2230 kg/m3.
The detailed analysis of the surface water absorption results indicates that specific value of deicing salt scaling test cannot be estimated from surface water absorption.

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.

The formula is as follows[4], LCC= Initialization cost + Running cost + Maintenance cost +Fixed cost + Energy cost + Water cost + Substitution cost– Residual value The mathematical model compartmentalized the LCC into initialization cost, running cost, fixed cost and residual value.
With the erosion of rivers, these three rivers become wider and water flux is also growing accordingly.
P, in: Life Cycle Costing Theory and Practice, edited by Oxford: BSP Professional Books, 1989, p. 31
[5] Guoqiang Ren, YIlin yin, The Feasibility Study on Life Cycle Cost Management in Terms of Paradigm Transformation, China Soft Since, 2003(5), p.148-151. in Chinese [6] Xiaofeng Zhao, Guoqiang Ren, Yilin Yin, Shibo Dong, Analysis on the model of uniform calculation of engineering cost, Water Resources and Hydropower Engineering, 2004(11), p.70-72. in Chinese [7] Medley, Larry G, The Life-Cycle Perspective: Managing Cost Before It Occurs.

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.

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.

There are some professional package e.g.
Marching mechanism include mechanism on land and mechanism on water.
Flow field around vehicle sailing on still water is target need to be analyzed.
Flow field include two phases (water and air), free surface was captured by VOF[2] (Volume of Fraction) method.

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.

Construction activities responsible for land erosion, water pollution, excessive resource and energy consumption.
Though SIPs are already use for energy efficiency among building professionals.
Hydroceramic It is a mixture of clay and hydrogel, which has the ability to swell in water and retain its structure.
The evaporation of the water contained in the material makes it a good material for passive cooling of the building.
In biophilic design, natural elements such as plants, water and sunlight are incorporated into building design.

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.