| The river channel of the city is an important part of the city.The waterfront and the shoreline of the river channel is a river“body”and“soul”.With the acceleration of urbanization,more and more enterprises and people are pouring into the cities,bringing tremendous pressure and more“responsibility”to the rivers of the city.Vegetation degradation and river water pollution in the coastal zone are serious,which makes the self-purification function of the river water seriously deregulated.The speed of self-purification is far less than the speed of pollution.Not only is the endogenous pollution serious,but also the external pollution is becoming more and more serious.The pollution of river water has been paid more and more attention by the state and people.The engineering of rivers and the reconstruction of riverside shores have also attracted the research and interest of many scholars.Urban riverside shore belts play an extremely important role in purifying water bodies,intercepting pollution,and landscape effects.In the past few decades,due to the vigorous development of industry and economy and consideration of the one-sided nature of the problem.Considering that there are many water conservancy safety in rivers,the river embankment is hardened,and the role of the riverside shoreline at the junction of water and land is not considered.The river channel and the shoreline are forcibly partitioned,so that the river water environment is relatively simple,thus greatly reducing the purification of the river water.Ability.Through the investigation and analysis of the riverside zone of the Dianchi River in Chaohu City and the riverside of the East and West Ring River,the seven aquatic plants of Canna,Barracuda,Reli,Iris,Iris,Oriental Cattail,and Myriophyllum sp.The purification effect and characteristics of the polluted river water body optimize the vegetation population and configuration of the riverside shore zone.Based on the comprehensive study of the ecological restoration of the urban riverside shoreline,this paper analyzes the current situation and existing problems of the shoreline of the Dianchi River and the East-West Ring River in Chaohu City,and combines the characteristics and actuality of the local riverside belt in Chaohu City.At present,a microcirculation ecological restoration technology based on solar water diversion urban riverside shoreline is proposed.Through systematic research,the following conclusions are drawn.?1?The study on the purification effect of single aquatic plants showed that the purification effects of the aquatic plants in the seven coastal zones on the water quality in the river channel have a good purification effect compared with the blank control.The total nitrogen?TN?and total phosphorus in the water body The concentrations of?TP?,ammonia nitrogen?NH3-N?and COD were lower than those of the blank control,but the purification effect was quite different.The removal rate of total nitrogen was better,recanth,canna and barracuda,removal rate.They were49.23%,39.42%,and 39.42%,respectively.The best removal effect on total phosphorus was re-flowering,barracuda and canna,and the removal rates were43.90%,39.02%,and 34.15%,respectively.The removal efficiency of ammonia nitrogen was better than that of Canna,Reli,Oriental cattail and iris,and the removal rates were 47.16%,41.48%,37.63%,and 34.58%,respectively.The removal rate of COD was better than that of Canna,Reli and Barracuda,which were 43.24%,37.84%,and 32.43%,respectively.?2?The study on the purification effect of combined aquatic plants shows that the combination of aquatic plants can bring good chemical and biological reactions,and the concentration of total nitrogen?TN?,total phosphorus?TP?,ammonia nitrogen?NH3-N?and COD in water is good.The removal effect of the single aquatic plants is greatly improved.Among them,the better removal effect on total nitrogen was the combination of Canna and Reli flower,the removal rate reached 62.31%,which was greater than the combination of Barracuda+Iris 53.27%.The best removal effect on total phosphorus was the combination of barracuda and iris,with a removal rate of43.9%,which was greater than 31.71%of the combination of Canna and Reli.The better removal effect of ammonia nitrogen is the combination of Canna and Re-flower,the removal rate is 49.66%,which is larger than 39.94%of the combination of barracuda and iris.The best removal effect on COD is the combination of Canna and Re-flower,the removal rate is 54.05%,which is greater than 48.65%of the combination of Barracuda and Iris.It can be seen that the purification effect of aquatic plants in different combinations of shoreshores is also very different,but compared with the purification effect of single aquatic plants,in addition to the significant improvement of the removal effect of total phosphorus,other indicators Still have improved.?3?The study on the water purification effect of the ecological remediation technology of the solar water diversion urban riverside shoreline shows that the whole microcirculation ecological restoration technology system has a good purification and filtration effect on the river water body,which is affected by the rainstorm of natural weather during the test operation.The water quality of the inlet and outlet water of the whole system is not stable enough,but the overall water quality treatment effect is obvious.Among them,micro-circulation ecological restoration technology of riverside shoreline has the best effect on total nitrogen removal,the average removal rate reached 45.42%,and the average concentration of total nitrogen in the influent water decreased from 5.13mg/L to 2.8mg/L.The average removal rate of total phosphorus in the water in the river was 27.68%,and the average concentration of total phosphorus in the influent water decreased from 1.12 mg/L to 0.81 mg/L.The average removal rate of ammonia nitrogen in the water in the river was 20.38%,and the average concentration of total phosphorus in the influent water decreased from2.11 mg/L to 1.68 mg/L.The average removal rate of COD in the water in the river was 31.03%,and the average concentration of COD in the inflow and outflow decreased from 29 mg/L to 20 mg/L. |
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