Study On The Current Construction Of Urban Built-up Area Landscape Corridor In Shenyang

In landscape ecology,corridors are mainly divided into three categories: linear corridors,strip corridors and river corridors.They have a variety of functions,the most important of which is ecological protection.In addition,they play roles in transportation,material and energy exchange,environmental protection and aesthetic value.In this paper,basing on the deficiency of current planning,construction research of urban landscape corridor and the need of practical work in Shenyang,landscaping installation geographic information system of Shenyang is established;quantitative analysis and evaluation of the present situation of landscape corridor construction and plant application are carried out;the ecological construction opinions of urban landscape corridor in Shenyang are proposed.The methods of aerial remote sensing,field investigation and statistical analysis are applied in the research.The main conclusions are as follows:1.A geographic information system for urban gardening facilities in Shenyang is established,which records the greening information in the built-up area in a detailed and systematic way,providing more accurate and detailed data for the development of urban greening in Shenyang.2.There are big differences in the density of road corridors in the built-up area of Shenyang.The index of average road corridor density is 3.69 km / km2 in the five districts(Heping District,Shenhe District,Dadong District,Huanggu District,and Tiexi District),which is lower than the index of 4.58 km / km2 in new urban areas and development district(Hunnan District,Shenbei District,Yuhong District,Sujiatun District,and Zhangshi Development District).The road network of new urban districts is more developed than the old,and the road connectivity is much better.3.The river corridor in Shenyang is mainly composed of three parts: Hunhe River,Puhe River and Huancheng River System landscape corridors.The greening area of the Hunhe landscape corridor is the largest(12.30km2),while the greening area of the surrounding city water system is the smallest(2.21km2).The surrounding city waterway landscape corridorsare mainly concentrated in the five districts of the city center.In terms of the number and area of corridors,Dadong District is the largest,followed by Shenhe District and Huanggu District,and Heping District and Tiexi District are the smallest.However,the average green areas of the corridor of Heping District,Tiexi District and Huanggu District are at the forefront.4.The distribution of Shelter forest varies greatly among administrative regions.Shenhe District and Dadong District have the most protected green space,while the newly constructed areas have better natural green space conditions and connectivity,which are easy to establish a more complete urban ecosystem.5.Native tree species are mostly used for road corridors greening in Shenyang,especially for street trees.The broad-leaved tree species used are mainly poplar,willow,locust,and elm.There are fewer conifers planted,mainly Pinus tabulaeformis and Picea koraiensis.The ratio of trees to shrubs is 1:0.62,and the ratio of conifers to broad-leaf trees is 1:951.In terms of river corridors,the ratio of conifers to broad-leaf trees of Hunhe River landscape corridor is1:19.6,and the ratio of conifers to broad-leaf trees is 1:0.6.The ratio of conifers to broad-leaf trees of Puhe River landscape corridor is 1:5.7,and the ratio of conifers to broad-leaf trees is1:7.1.The ratio of conifers to broad-leaf trees of Huancheng River System is 1:3.5,and the ratio of conifers to broad-leaf trees is 1:1.4.The tree species used for protective greenbelt is relatively single,with poplars as the main broad-leaved tree and Chinese pine as the main conifers.The ratio of conifers to broad-leaf trees is 1:42.1,and the ratio of trees to shrubs is1:0.28.The landscape efficiency is so poor,only meeting the ecological protection function.6.Road landscape corridor node is an important part of urban landscape ecological corridor construction.As for Shenyang,most of the important nodes of road corridors are large urban parks(more than 2000m2).Studies have shown that there is no such rode in Dahan area and New town area of Yuhong District,north of the Jianshe Road and south of Hunnan Road.It is suggested that the layout of large-scale park greening area should be rationalized in the future.