Crystalline pipe plugging of the tunnel drainage system was one causes lining cracking and water leakage. Effective prevention crystalline very important to ensure safety stability structure during operation. Using methods field investigation, indoor model test numerical simulation, a new flocking anti crystallization blocking technology proposed. The law anti-crystallization efficiency flocked...

regarding the role and importance of subsurface drainage in water table control, many studies have been made throughout the world to find out new techniques and more economical solutions, especially as related to different pipe envelope material and their installations. this research was conducted to investigate the use of rice husk, as drain envelope material, in drainage installations. in add...

Ground Penetrating Radar (GPR) is one of the most widely exploited diagnostics tools in the fields of the water monitoring and management as well as in the recent application fields of the agricultural geophysics. In this work, we present the most recent results concerning with a state of art data processing for GPR based on accurate models of the inverse scattering at the basis of the sensing ...

There are many obstacles to the implementation of sustainable drainage systems (SuDS) in England and Wales as a viable alternative to conventional pipe systems. However, in Scotland these obstacles have been largely overcome and many SuDS schemes have been successfully implemented over the past decade. This paper will review SuDS in Scotland and compare the structure of the water companies nort...

The influence of recycling on double-pass solar air collectors with welding of the V-corrugated absorber has been studied experimentally and theoretically. Welding the V-corrugated absorber and the recycle-effect concept to the solar air collector was proposed to strengthen the convective heat-transfer coefficient due to turbulence promotion. Both the recycle effect and the V-corrugated absorbe...

This paper extends the theory of the diffraction of sound on 1D corrugated surfaces to 2D corrugated surfaces. Such surfaces, that are egg crate shaped, diffract incoming sound into all polar directions, which is fundamentally different from 1D corrugated surfaces. A theoretical justification is given for extending the classical grating equation to the case of incident inhomogeneous waves, for ...