长沙市莲花镇土地生态质量分区研究

当代社会的经济发展与生态环境保护联系紧密,环境、经济、发展之间的矛盾已经成为制约可持续发展最重要的问题。土地利用方式是否合理直接影响到生态环境的好坏,土地生态质量分区有助于推动两型(环境友好型与资源节约型)社会的构建,因地制宜地对土地进行开发利用是经济发展的重要前期工作。文章以长沙市莲花镇为研究区,以其17个行政村为评价单元,采用综合评价法,选取植被覆盖度、水面覆盖度、农作物产量、土地裸露度、建设用地干扰度为评价指标,运用线性加权法计算17个行政村关于5个评价指标的综合评分值。采用总分频率曲线法对土地生态质量综合评分值进行等级划分,将莲花镇的土地生态质量划分为4个等级:土地生态质量良好区、土地生态质量较好区、土地生态质量一般区及土地生态质量较差区。根据各行政村的土地生态特征及其所处分区等级,对研究区的土地利用结构进行调整,并对今后的土地利用方式提出合理化建议,以期为研究区的可持续发展提供理论依据。

STUDY ON LAND ECOLOGICAL QUALITY ZONING IN LIANHUA TOWN OF CHANGSHA

The economic development of the modern society is closely relatedwith ecological environment protection. The contradictionbetween environment and economy development now hasbecome the most important problem for sustainable development. Whether the land use methods are right or not directly influence the ecological environment. Therefore land zoning is an important preliminary work for promoting building the "environment-friendly and resource-saving" society. Taking 17 villages in Lianhua town of Changsha as evaluation unit, this paper selected 5 indexes,i.e., vegetation coverage, surface percentage, crop yields, land bare degrees and construction land disturbance degrees, and comprehensively evaluatedthe land ecological quality using the linear weighted sum method. According to the result, villages were divided into four zones that were good ecological quality, better ecological quality, general ecological quality and poor ecological quality areas. And then, the land use structure was adjusted according to the characteristic of each land ecological zone quality. Finally, the corresponding suggestions for the protection and construction of land use were put forward, in order to promote the sustainable land use in Lianhua town.