Research On Solving Issues Of Silting Of Filtering Bed And Cold River Through The End Of Freezing Under The Condition Of Percolating Water Abstraction In Xinjiang Province

Technique of percolating water abstraction is more and more used to life in the water andindustrial and agricultural economic development， water. Water filtration project is usedmore and more applications recent years in Xinjiang. Xinjiang is a typical interior aridregion， water resources shortage and the Xinjiang river is a mountain river， higher watercontent， affected by the season often-dry or dry in winter， the river often appear "throughthe end of frozen" phenomenon， therefore in the construction of Xinjiang water filtrationengineering and other mainland area both the commonalities and differences， in order tobetter study the summary of relevant problems for application of filtration water projects inXinjiang area， the author through consulting literature and field research on the percolationwater in taking silting of filtering bed control and anti freezing measures are studied andsummarized.In this paper， through the consult massive literature， combined with the South andNorth of Xinjiang engineering examples， expounds the technological principle of waterfiltration natural filtering layer and artificial filter research， analyzing the mechanism and theinfluence on the blockage of the frozen water filtration， binding domain characteristics ofXinjiang local climate and river characteristics， research to solve water percolationcondition， silting of filtering bed， cold river "at the end of freeze" and other related issues.Draws the following conclusion:The silting of filtering bed control measures are divided into:1. preventive measures;mainly in:(1) project site;(2) to control the infiltration rate;(3) build Yong dam improve filterbed surface water flow;(4) engineering design;(5) the control of construction control.2.dredgingmeasures:(1) cleaning the surface of filter bed: using high pressure watererosion;②mechanical dredging and dredging; biochemical method.(2) the filter layer internalsilting processing: using high pressure gas， water backwashing process.For frozen basically give priority to prevention. Mainly to select potential water thicknessand area are larger regions in the project location，project construction in local freezing depthbelow the region; in addition，for not dry rivers，take to build Yong dam，up the river waterlevel increase the hydrodynamic conditions， improve the flow velocity， namely preventingice also prevent blockage of filter bed surface.