Urban artificial lakes generally refer to water bodies planned to be constructed for the purpose of relieving urban floods and droughts or improving urban landscape quality.They play an important role in storage,irrigation,landscape and other aspects and are closely related to the city.Relying on the current conditions such as rivers,depressions,pits and ponds,and the demands of urban development,the construction of artificial lakes is combined with the planning and design of park green space.While meeting the requirements of urban water system construction,public green space with water view is created,which has the dual positioning and function of urban water system and urban green space.As a key landscape element of the park,the sustainable and benign operation of the lake is of great significance to ensure the ecology and landscape of the park.Water quantity and quality are the two core contents in formulating reasonable and dynamic operation and management scheme of Park artificial lake.This paper focuses on both of them.At the same time,based on the artificial lake,the overall space layout,vertical design,site function and plant allocation of the park are planned uniformly.The reference methods for planning and construction of general Lake parks and for formulating Lake operation scheme are put forward.In terms of water quantity,the water balance of urban artificial lake is mainly analyzed.Firstly,the reasons and contents of water quantity change of urban artificial lake are analyzed in detail,and the water balance equation for urban artificial lake is constructed by comparing the algorithms in different fields from different perspectives,and the specific calculation method of each element in the equation and the analysis method of the results are explained.Secondly,the methods of regulating and controlling the water quantity of artificial lake are elaborated,and the adjustability and regulating means of each element are analyzed.Meanwhile,it is clear that increasing the surface runoff inflow into the lake is one of the important means to increase the water quantity of artificial lake in urban parks,and the characteristics and applicable conditions of common sponge facilities are elaborated according to the lake environment.In terms of water quality,the significance of maintaining good water quality of the lake to ensure its stable operation is explained,the reasons for water quality changes are elaborated,and the water quality changes of artificial lake are simulated by AQUATOX software,the principle of the software and the specific application method in the project are explained,so that water quality and quantity can be used together as the determination of water supply and exchange mode of lake.To formulate the guideline for dynamic operation scheme of artificial lake.While analyzing the construction and operation of urban man-made lake,the design method of manmade lake in urban park is focused on and the overall planning and design of park environment where the lake is located is studied.It mainly includes water form,water depth and design water level,operation mode,barge design and design method of park land landscape system.Finally,taking the planning and design of Moon Lake Park in Luanzhou City of Hebei Province as an example,the natural and artificial conditions are analyzed,the water balance equation applicable to the project is constructed,and the surface runoff of the park is further optimized and managed through the design.Detailed calculations are carried out for each equation and a water balance analysis table is obtained.At the same time,the software is used to simulate the water quality of Park artificial lake,and the change rule of water quality of the lake is obtained.The strategy of making up and changing water for park lake is formulated,and the dynamic operation and management mode of urban park artificial lake is summarized.It is hoped that this study will provide certain theoretical basis and case references for the design of urban artificial lake parks of the same type. |