Research On Engineering Suitability Of Percolating Water Abstraction From Beneath Riverbed In Baishi Reservoir Of Liaoning Province

This paper chooses the engineering suitability of Percolating Water Abstraction from Beneath Riverbed in Baishi reservoir of liaoning province as research object, based on the environment condition,which scientificly evaluates the characteristic of filter bed and the adaptability of water quality. Thick sandy gravel layer of filter bed distributed widely in water intake project area, which is benefit to water intake; the silt distributed in sluice area decrease the penetrability of filter bed obviously, but it can be improved by clearing the silt.The mineral ingredient of silt,which has more stronger function such as physics adsorption , chemistry and biology reaction ,can purge the water to a large extent .It is indicated from the reasearch result of clearing silt that, the penetrability can be better restored after clearing the silt on the surface of filter bed.The method of clearing silt begins on the premise of the stop of water intake.Filter bed should be exposurd as less as possible because alternation of exposure and immersion is disbennifit to the penetrability of filter bed.This paper also has analysed the Suitability of water quality in water source area. As a whole, the water quality of filtering water intaked from filter bed turns better, the index such as turbidity and ammonia-nitrogen etc can meet the quality standard of drinking water by infiltration function of filter bedo The water environment becomes a little eutrophic because of the upriver pollution. The reservoir can adjust water quality by itself, And attempering the reservoir reasonably can boost up the capacity of Self—purification of the water. At last, the volume of water intaking and attenuation rule of iron and manganese are forecasted by numerical simulation .the silt on filter bed according to the way from the research, the water intaking volume can meet the planing demand whether one or two factorys run; so can the iron and manganese which exceeded water quality standard in undercurrent water after running the factory.