基于土地生态环境质量的建设用地空间管制分区评价

从土地生态风险和生态系统服务价值两方面构建了土地生态环境质量的综合评价方法,并以湖北省潜江市为例,利用土地生态质量评价结果对新一轮土地利用总体规划(2006—2020年)的建设用地管制分区进行评价。结果表明:(1)研究区西南部的生态风险整体较高,建设用地和湖泊水面的生态风险性较大。(2)生态系统服务价值较低,低生态系统服务价值区域占52.24%。(3)土地生态环境质量比较均衡且具有显著的空间分布特征,其中低价值中风险土地类型分布最广,主要分布于西南部返湾湖的外围区域。(4)建设用地管制分区与土地生态环境质量分布比较协调,能够达到控制建设用地空间扩展和保护生态环境的基本目的,但管制分区划分中存在以用地需求为导向和分区依据不足的问题。

Evaluation of Spatial Control Division of Construction Lands Based on Land Eco-environmental Quality

A comprehensive evaluation system for land eco-environmental quality is built based on land ecological risk and ecosystem service value.By taking Qianjiang City in Hubei Province as an example,the spatial control division of construction lands in the new general landuse planning(2006—2020) is evaluated according to the result from the evaluation of land eco-environment quality.Results show that high ecological risk occurs mainly in the southwest part of Qianjiang City and construction lands and lakes are faced with relatively high ecological risk.Ecosystem service value in the whole area is quite low and land with low ecological service value accounts for 52.24% of the whole city.Land eco-environmental quality of the study area is relatively uniform and has remarkable spatial distribution characteristics.The land with low ecosystem service value and medium ecological risk widely distributes around Fanwan Lake in the southwest.The spatial control division of construction lands coordinates well with land eco-environmental quality,which meets the needs in preventing the expansion of construction lands and protecting the ecological environment.However,there still exist such problems as land requirement-oriented supply and lack of classification evidences in the spatial control division.