株洲市主城区绿地景观格局分区比较研究

Comparative Study on the Zoning of Green Space Landscape Patterns in the Main Urban Area of Zhuzhou City

为探究株洲市主城区绿地现状与存在的问题,研究了2019年株洲市主城区绿地景观格局。基于GIS及RS技术,应用生态学方法对株洲市主城区绿地景观格局进行了研究,结果表明:①在景观水平上,天元区破碎化程度最大;芦淞区PAFRAC值最大,SHEI最小,SHDI最小,景观形状相对复杂,景观受少数优势斑块类型支配,异质性低;石峰区斑块类型在景观中分布更均匀;②斑块类型水平上,相较其它分区,荷塘区公园绿地比例偏低,总面积偏少。石峰区公园绿地面积大但存在数量极少。石峰区防护绿地总面积最大,但其破碎化程度较高。芦淞区其他附属绿地总面积小,占绿地总面积比例小,多数斑块面积小,形状简单,物理连接度低。芦淞区区域绿地面积最大,但存在破碎化程度高的问题。荷塘区区域绿地总面积小,数量少,平均面积大,形状简单,斑块聚集呈团状。针对绿地斑块类型比例偏低,总面积偏少的问题,提出了建议:结合有利条件进行扩建或增建,以提高绿地斑块分布的均匀度;针对绿地斑块破碎的问题,在绿地连通性较低处重点进行绿地建设,以提高各绿地斑块的连通性,构筑连续的生态绿地网络。

This paper aims to investigate the landscape patterns of green space in the main urban area of Zhuzhou city in 2019.Based on GIS and RS,the landscape patterns of green space in the main urban area of Zhuzhou city are studied.The results show that:①At the landscape level,Tianyuan District has the largest fragmentation degree;The PAFRAC value was the largest;SHEI was the smallest and SHDI was the smallest in the Lusong district.The landscape shape was relatively complex,and the landscape is dominated by a few dominant patch types and show low heterogeneity.The class types in the Shifeng area were more evenly distributed in the landscape;②At the level of class type,compared with other districts,the total area park green space in Hetang district was relatively low.Park green area in Shifeng district was large but there were very few patches.The total area of protected green space in Shifeng District was the largest,but its degree of fragmentation was relatively high.The total area of other ancillary green space in Lusong area was small,accounting for a small proportion of the total area of green space,and most of the patches have small areas,simple shape,and low physical connectivity.Lusong area had the largest area of green space,but there was a problem of high degree of fragmentation.The total area of Hetang district green space was small;the number was small;the average area was large;the shape was simple,and patches were clustered;③In view of the low proportion of patch type green space and the small total areas,it is suggested to expand or build more patches in combination with favorable conditions to improve the uniformity of green space patch distribution.