Experimental Research On The Transformation Of Ecological Slope Protection And Groundwater Conservation In The Fifteen Mile River

For a long time, people pay more attention to the discharge and drainage capacities of the river itself, traditional urban river bank slope protection generally uses concrete or masonry and other hard lining methods. The traditional slope protection engineering walls the bank surface off, the original biology growing on the bank slope is difficult to survive, and rivers reduce their self purification capacity. At the same time, the river water and the groundwater flow is blocked by the hardened and watertight revetment. The traditional river slope protection can not meet the needs of urban river slope protection,so it is needed to search for the proper urban river ecological slope protection technology so as to repair the ecological environment of the urban river, to improve the urban landscape and to promote the construction of ecological city.In this paper, based on the analysis of the present situation of the ecological protection of the ecological slope protection and the water conservation, the following research work has been done:(1) The connotation of ecological slope protection and the main types of ecological protection of urban river at home and abroad are introduced. Adaptability and advantages and disadvantages are analyzed.(2) The current situation of the slope protection of the Fifteen Mile River in Hefei was investigated and the existing problems were summarized and analyzed.(3) In the presence of hard slope, high and steep slope, open gentle slope in the Fifteen Mile River, the corresponding projects of ecological transformation are respectively put forward and stability, landscape ecology and economy were analyzed and compared. Final solution:the hanging net and laying turf method is used to repair the hard slope, Rongxun block retaining wall is selected when constructing high and steep slope ecology, shrub and grass combination of plant collocation pattern is used when doing open slope ecological construction with Cinnamomum camphora, Ligustrum lucidum, hibiscus, Nandina domestica, February orchid and Acorus calamus arbor.(4) Through Fifteen Mile River field prototype observation experiment method, the traditional hardening upright retaining wall, porous ecological concrete retaining wall and natural plant slope protection of groundwater level change for long-term monitoring are respectively done, by analyzing and calculating, ecological revetment has advantageous effect in river water and underground water mutual conservation. The results show that:the effect of ecological slope protection to the interaction between groundwater and river water conservation is significant, the ecological building block retaining wall and slope protection with vegetation net infiltration is 1.93 times and 2.11 times the use of traditional hardening retaining wall in the net infiltration respectively, in the actual application, the effect is maybe better.