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To eliminate the used sand to the residual coal dust(FS powder) of the experiment, it is all new sand in experiment, add bentonite, coal dust(FS powder, coal dust+α starch), water, dry mixed 3minutes,wet mixed 8 minutes in molding sand technological condition, then test various properties of molding sand.
Table 1 100 new sand + 8 bentonite + 5 FSpowder +3.0water performance index water content（%） compactability（%） air permeability (pa) green compression strength (kg/cm2) average 3.24 45 130 0.94 performance index shear strength (kpa) untimate deformation (mm) shatter index（%） stabilization of surface（%） average 20 0.73 68.3 98.1 Table 2 100 new sand + 8 bentonite + 5 coal dust +3.0water performance index water content（%） compactability（%） air permeability (pa) green compression strength (kg/cm2) green compression strength (kg/cm2) average 3.24 45 130 0.94 0.94 performance index shear strength (kpa) untimate deformation (mm) shatter index（%） stabilization of surface（%） stabilization of surface（%） average 20 0.73 68.3 98.1 98.1 performance index water content（%） compactability（%） air permeability (pa) green compression strength (kg/cm2) average 3.44 44 120 1.00 performance index shear strength (kpa) untimate deformation (mm) shatter index（%） stabilization of surface
M593 shell ‘s main fault is machinery adhering sand, it’s caused by casting wall thick(compared with other parts), takes much longer for molding sand at high temperature(Also, the environment temperature is very high in summer, large water loss in casting mold, the stability on surface of sand mold is lower).Except raise content of FS powder, lower pouring temperature proper can be used to reduce M593 shell’s adhering sand fault.
Conclusion （1）When water content is 3.0％，compactability can be controlled into 36～45％； （2）The influence of green compression strength, followed by is：5FS powder>（4.5coal dust+0.5αstarch）>5coal dust； （3）The influence of shatter index, followed by is：5FS powder>（4.5coal dust+0.5αstarch）>5coal dust； （4）Adding FS powder can add molding sand ‘s strength and tenacity;compare with adding single coal dust, adding little αstarch also can add molding sand ‘s strength and tenacity on the basis of add coal dust
[2] republic by Chinese mechanical engineering professional societies.

Danjiangkou reservoir area is the main water source area and submerged area of the Middle Route South-to-North Water Transfer Project of China.
Soil erosion is a significant influence factor in reservoir water quality and water transfer project success.
Danjiangkou reservoir area is the main submerged area and water source area of Middle Route of the South-to-North Water Transfer Project of China.
The ecological environment around the reservoir area, especially soil erosion, is a significant influence factor in the reservoir water quality and water transfer project success.
Water Resources & Hydropower Press of China: Beijing (2008).

The bridge of the chilled anchor head of the pier head problems such as water, severe corrosion ( Fig.3).
In order to ensure that the old and the new cable tensioning, heading anchor tension extension bar adopts the design of professional manufacturers.
Through the design of special tools will slowly old rope down, discharged into the river waiting for professional construction equipment. 3.8 The new Cable Installed and Tension(Fig.7) 3.8.1 Construction Preparation. 1) Check the finished cable; 2) the erection of the main arch stretching platform and welding the main arch temporary suspension points; 3) dealing cable conduit. 3.8.2 Lasso Overall Bridge Deck.
Water Conservancy and Hydropower Science and Technology progress, The Calculation Method of the Initial Tension in arc Bridge [J]. 2000, (6): 32-35.

Formaldehyde (1000 mg L-1) standard solution was stocked in water (Guidechem, China).
Ultrapure deionized H2O with electrical resistivity of 18.2 MΩ cm was prepared with a Milli-Q Integral 5 water purifier (Millipore, USA). 2.2 Size-Controlled Synthesis of C/N-T and Characterizations.
Adnan, Awareness, knowledge and perception of formaldehyde emission from wood composite products among design professionals, Malaysian Forester 84 (2021) 120-136

Table1.Work breakdown structure of the Hsin-an River hydropower project and its risk factors Single project Unit project Item project Risk factor Preparatory construction Land expropriation and immigration (1)Land expropriation funds (2)Resettlement scheme (3)Compensation standards Traffic (1)Environmental damage (2) Construction quality Power supply, water supply and the others construction of line Campsite (1)Construction quality (2)Environmental damage Preparation engineering Diversion channel (1)Geological conditions (2)Hydrologic conditions (3)Construction quality Concrete system Mix concrete on the right bank and Refrigeration system (1)Construction quality (2)Environmental damage Mix concrete on the left bank and Refrigeration system (1)Construction quality (2)Environmental damage Main construction Dam foundation project Dam foundation on the left bank (1)Geological conditions (2)Construction management (3)Construction technology Plant project building project
References [1] Simon, P., Hillson, D. and Newland, K., Project Risk Analysis and Management (PRAM) Guide, Association for Project Management, Ascot-UK, 1997 [2] Boothroyd, C., Emmett, J., Risk Management-A practical guide for construction professionals, Witherby & Co Ltd, London, 1996 [3] Charoenngam C, Yeh CY.Contratual risk and liability sharing in hydropower construction[j].International Journal of Project Management,1999, 17(1):29-37 [4] ZhenQiang Wang, and so on.
The application of Monte Carlo simulation technology in the hydropower project risk analysis, Water resources and hydropower of northeast China, 2003, 21(6): 9-10(In Chinese)

Due to the flood water period caused by the tidal action everyday in the beach areas, great changes of water depth at different times, and differences of land and water alternating time in different regions, three technical problems are put forward for the construction of the wind power farm on the beach: (1) The entries of the construction machinery, materials, fan and the equipment supplies are difficult. (2) The selection, design and construction of the fan foundation are difficult. (3) The construction of the wind turbine tower, cabin and leaf segments are difficult.
According to the investment proportion and professional organization research of the established offshore wind farms abroad, fan foundation accounts for about 15-25% of the offshore wind farm project investment, which is one of the factors contributing to the high cost of the offshore wind power.
Offshore wind turbine foundation can be divided into gravity type, high pile desktop, single pile type, catheter posture and cylinder base type in terms of the structure, which depends on the water depth, engineering geology, installation resources and many other factors to choose the foundation type.

At the scene of the big fire rescue aid, although rescue workers in the process of fire wearing protective clothing and professional helmet, equipped with special apparatus, but at high temperature, high radiation, and more than human to bear ability beyond the range of the cases, it is hard to close to the fire, it is also difficult to quiet distance of effective operations.
The spray pipe that installed at the top of the body can rotate 360 °, the end is joint that is used to connect water pipe, when need can be connected to water supply equipment, water is provided by external water supply equipment.

With the development of the management concepts and methods for the water quality objective based on the control unit, control unit zoning is the important means to implement the water pollution resource reduction on river basin management [3-6].Therefore, according to the survey of water ecology environment of Liaohe river basin in Liaoning province as well as the analysis of the water ecology factors, combined with the historical monitoring data, it is meaningful and significant for control unit zoning to implement the water environmental management, control the water pollution amount, protect water ecology environment and make scientific planning for water environment management.
The control unit boundary is determined by the clean water region of higher water quality objective.
Moreover, the river basin boundaries, the water ecological function area and the water function area were referenced.
There are three ways to develop the GIS software: independent development, pure development based on professional GIS software, and secondary integrated development.
Federal water pollution control act.

Water content has great effect on mechanical properties of silt.
Then water addition is calculated according to varying water content, and sprayed uniformity to test silt.
Such phenomenon is caused by small space value of water content to three test groups.
[2] The Professional Standards Compilation Group of People’s Republic of China.
Beijing: China Water Power Press, 1999

Unread ground water conditions d.
Therefore, many projects suffer due to inexperienced professionals [20].
Water management is an essential factor in controlling slope stability.
Safe drainage of such high runoff to the ultimate outlet (river or water bodies in the form of lake) always remains a challenging task [27].
Discharge may increase with time primarily due to three factors: 1) increase in building density and paved area, 2) increase in rainfall intensity because of impact climate change, and 3) increase of per capita water utilization because of improved life style and better water supply [27].