The Relationship Between Eco-slope Protection Materials And River Quality

Most researches on ecological bank focus on its definition and the water purification of planting vegetations presently. What should be known is how to choose the better Eco-slope protection material and the impact between Eco-slope protection materials and river quality. This paper is based on experiment about the relationship, which can epitomize in three parts:⑴The impact on water quality by applying the Eco-slope protection material;⑵The impact on Eco-slope protection material because of the river flowing and freezing;⑶Analysis on the level of degrading pollutants, protecting the water quality and improving the river self-purification.Main collusions⑴The experiment results show that the eco-slope protection material release alkalinity at the first days, which cause the increasing of the PH. The highest value of the PH is 10.2～13 nearby the materials. The soil around the materials can reduce the value of PH to 8.2～11.5.⑵When the alkalinity of the eco-slope protection material spread to the river, it can arise chemical reaction which can degrade the pollutants such as nitrogen compounds and phosphorus compounds.⑶In this paper, the concept pollutants - area containment rate is first mentioned, which means that the degraded pollutants weight by per area of the eco-slope protection material in unit time. Chemical oxygen demand, total nitrogen and total phosphorus are included in the pollutants.⑷In the first seven days of the experiment running, the decrease of the pollutants is caused by physisorption, the average removal level is 16%～26%. Chemical oxygen demand- area containment rate is 3.7～6.9 g / m2?d.In the next 10 days, the average removal level is 4.67%～13.32% and chemical oxygen demand- area containment rate is 0.77～3.26 g / m2?d.⑸Eco-slope protection material can degrade nitrogen compounds and phosphorus compounds. The removal level of nitrogen compounds is 26.2%～41.5%, The removal level of nitrogen compounds is 43.9%～67.3%. The total nitrogen-area containment rate is 78.0～178.0 mg / m2?d.The total phosphorus -area containment rate is 11.2～20.5 mg / m2?d. The experimental setup, experimental methods and the first evaluation in this paper can be the scientific basis for the further study of the relationship between eco-slope protection materials and water quality...