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The construction sewage indicates the waste water created in the concrete mixing.
Its alkalinity is high, whose PH value can be up to 12-13, besides, it also contains harmful additives which can solute in the water.
The casual discharge of the water which exceeds the standard can cause the water pollution.
Formaldehyde, a gas with a stimulating smell, has strong adhesiveness, and it is often added in cement wall with water reducer.
Therefore, the paint, coating, glue and water-proof material in the decorating material must conform to the national standard, if possible, they'd better be the approved by Chinese Environment Symbol, and about the nature of the materials, they'd better be water-based wood lacquer.

The application prospect of this new heat treatment process is favored by domestic and foreign heat treatment professionals[1-3].
Table 2 Heat treatment conditions and parameters specimens Quenching temperature Quenching holding time Cooling medium Tempering temperature Tempering holding time Cooling medium 1 820℃ 0 Water 550℃ 60 min Water 2 840℃ 0 Water 550℃ 60 min Water 3 860℃ 0 Water 550℃ 60 min Water 4 880℃ 0 Water 550℃ 60 min Water 5 840℃ 30 min Water 550℃ 60 min Water In this experiment, heat treatment equipment is the SRJX-4-13 box-type resistance furnace.

Materials making the testing samples include Portland cement, building waste, natural fine aggregate, fly ash, mineral activator and water etc..
The office unifies the managerial functions of building demolition, CDW removal, stacking, processing and utilization; (2) Construct a professional demolition and CDW transportation team.
The team are employed to strengthen the link between demolition and transportation, which helps CDW classification, makes sure useful substances can be fully utilized and reduces dust generated in the whole process; (3) Develop the standards of CDW processing and utilization; (4) Set up information network focusing on building dismantlement and CDW transportation across the city, so that secure all the work is done by professional organizations; (5) Build up CDW processing and utilizing factories, further sorting and processing to produce high quality products; (6) Establish of research institutions, providing the scientific basis for the CDW reuse and expanding the range of use.
Winkler: Recycling Construction & Demolition Waste: A LEED-Based Toolkit, (McGraw-Hill Professional, USA 2010) [2] C.

Water from reservoir rocks is salty.
As a subject of our research, we selected horizontal settlers used by oil producing and oil-field companies to separate water-in-oil emulsion into oil and oil-field water, mechanical admixtures and salts being simultaneously removed [15].
Jones, Corrosion and Water Technology For Petroleum Producers, Oil & Gas Consultants Int.
Fink, Oil Fields Chemicals, Gulf Professional Publishing, New York, 2003
Ghalambor, Petroleum Production Engineering, A Computer-Assisted Approach, first ed., Gulf Professional Publishing, 2007

Depending on temperature and pressure conditions can be produced: hot water, water and steam mixtures, wet steam and dry steam.
From this reason there is most important for successful development to appoint very professional partners in development and to split the project to the logical development stages each describing the specific futures and targets for individual stages [8]. 1.
The first stage has to demonstrate the feasibility and suitable technical options of the project and also the way of professional approach in exploration of geothermal potential and suitable technical solution to use it.
The results are cumulated in several studies and professional reports and today are the best library for evaluating also the Slovakian Geothermal potential and availability of geothermal sources.
Heat capacity of geothermal water reservoir rocks, i.e.

On the basis of observation data of water and sediment collected from the North Branch during many years, Chen et al [3] summarized water split ratio of the South and North Branch and discussed the phenomenon of water spilling over from the North Branch.
The effect of the dry and flood season on water split ratio.
Table.1 Cross-sectional water discharge and water split ratio of ebb tide in middle tide 　 　 During the dry season During the flood season North Branch South Branch North Branch South Branch Discharge(*104 m³) 4025 371172 7988 598401 water split ratio(%) 1.07% 98.93% 1.32% 98.68% The effect of tidal type on ebb water split ratio.
Water Resources Protection, 2011, 27(04):31-34,in Chinese
The 7th symposium proceedings of hydrology sediment professional committee of Chinese Society of Hydroelectric Engineering[C], 2007:112-116, in Chinese

Demarcation of fresh- and saline-water interface is important in water supply engineering in coastal regions.
Though water is plentiful along the coastal belt, finding potable (fresh) water in this region is a challenge due to sea water intrusion to fresh water table.
He also noted that the mixing zone between freshwater and salt water tends to be rather thin and the brackish water is being flushed away to the sea.
The saline water (A), intermixing zone (C) and fresh water zone (B) are clearly indicated in the figures.
Professional paper 5, (1991) p.5-21

To ensure water yield of source water reliable and water quality to meet the requirements are the first principle of the water resource selection.
Towns water consumption prediction Town water consumption is generally divided into the domestic water consumption, industrial water consumption and other water consumption etc.
The water of demand in households  can be obtained according to the certain domestic water indicators and public buildings water, industrial water, municipal water, unforeseen water and leakage water of the pipe network can be obtained by the corresponding ratio of reference norms.
To ensure water yield of water source reliable and water quality to meet the requirements is the first principle of the water selection.
Acknowledgements This work was financially supported by the Key Discipline of Civil Engineering in Hunan Province, the National Natural Science Fund of China (11175081), the First Kind of National Characteristics Professional(TS12322)and the Project of Hunan Provincial Department of Science and Technology (2011SK2015).

The water traffic safety is a huge system project, establish effective continuous safety evaluation of management mechanism, is currently urgent task by authorities, and of great practical significance of Prevention and control of the Yangtze River water traffic safety.
With the emphasis on water safety management continues to improve, water traffic safety analysis and safety evaluation studies are increasingly concerned.
With the rapid development of the Yangtze River shipping, water traffic accidents, a serious threat to the safety of people's life and property, and water traffic safety has become a prominent problem in the Yangtze River shipping.
According to statistics, 80% of water accidents are caused by human factors.
China Water Transport,2006

Many industries need to treat water to obtain very high quality water for demanding purposes or for water output meeting requirements of discharge.
The text book is Industrial Wastewater Management, Treatment, and Disposal, written by Water Environment Federation, published by McGraw-Hill Professional, 3rd revised edition in 2008.
Relationship between flow ratio and high water level is clearly described in Fig. 2 [8].
Fig. 2 Relationship between flow ratio and high water level.
[6] Water Environment Federation: Industrial Wastewater Management, Treatment, and Disposal: Manual of Practice FD-3, published by McGraw-Hill Professional; 3rd Revised edition (2008)