薛春燕

摘要 [目的]研究两步移动搜索法（2SFCA）用于开放型公益林选址的可行性。[方法]以嘉定区为研究对象，基于2SFCA分析嘉定区现状公园绿地的可达性水平，并利用ArcGIS的空间叠加分析法，从实现嘉定区休闲游憩绿地资源公平分布出发，研究开放型公益林的选址方法。[结果]目前嘉定区现状公园绿地可达性不平均，40%的居住区仍不能通过步行15 min到达周边公园；通过2SFCA模型分析获得的可达性指数<8.5的区域，是开放型公益林选址的重点考虑区域。基于可达性分析结果，结合公园绿地建设规划、城镇建设区规划数据，通过空间叠加分析，最终可获得满足嘉定区开放型公益林建设基本条件的合理选址地4个。[结论]基于2SFCA模型进行开放型公益林的选址具有一定科学合理性，可为今后开放型公益林建设选址提供参考。

关键词 开放型公益林；两步移动搜索法（2SFCA）；空间叠加分析；选址

Study on Location of Jiading District Open Public Welfare Forest Based on 2SFCA Model

XUE Chun-yan （Shanghai Forestry Station， Shanghai 200072）

Abstract [Objective]To study the feasibility of applying two step floating catchment area method （2SFCA） to the selection of open public forest sites. [Method]Take Jiading District as the object of study， based on two step floating catchment area method （2SFCA）， the accessibility level of Jiading District green space was analyzed， and used ArcGIS spatial overlay analysis method to study the location of open non-commercial forest from realizing the equitable distribution of recreational green land resources in Jiading District. [Result]The results showed that the accessibility of the green space in Jiading District was not even， and 40% of the residential area was still unable to reach the surrounding park by 15 minutes on foot. The area with accessibility index less than 8.5 obtained by 2SFCA was the key consideration area for the selection of open non-commercial forest. Based on the results of accessibility analysis， and combined with Jiading District Park green space construction planning and urban construction area planning， it could obtain four reasonable places to meet the basic conditions of open non-commercial forest construction in Jiading District by using spatial overlay analysis method. [Conclusion]The selection of open public forest based on 2SFCA model has certain scientific rationality， and provided reference for the construction and utilization of a non-commercial forest in the future.

Key words Open non-commercial forest；2SFCA；Spatial overlay analysis；Location selection

目前，上海市林業正面临如何促进林地综合利用、提升林地功能，以满足市民日益增长的回归自然的需求及提升市民参与度、认可度等现实问题。城市公园、森林公园、郊野公园等是上海林地休闲利用的主要形式。生态公益林经一定改造后向市民开放，让市民能感受更原始的森林气息，这类林地为开放型公益林。与一般城市公园绿地相同，开放型公益林主要供市民免费进行森林休闲游憩，不用长途跋涉即可接近大自然，从事户外活动，它是公园绿地的补充，主要位于城市外围，是介于城市公园和森林公园中间状态，规模和设施类别均小于郊野公园的新型城市绿色空间类型。目前，对开放型公益林的改造利用尚处于探索研究阶段，关于如何选择合适地块开展开放型公益林改造尚鲜见报道。

在开放型公益林选址时，需考虑现有公园绿地能否满足周边居民需要，其空间分布能否平等地为居民提供休闲游憩的机会[1]。……