北京旧城四合院区域绿化水平衡量指标探究

在我国城市规划建设中,衡量一个地区的绿化效果普遍采用的指标是"绿地率",但在北京大部分的旧城改造项目中,绿地率很难达到规定指标的要求。本文分析了北京旧城四合院区域空间结构、建筑形式的特殊性,并比较了传统四合院区域和现代小区绿化的CO2固定量,得出结论认为以绿地率作为绿化水平衡量指标的评估方法在旧城四合院区域改造更新中是不合适的,而以乔木数量、综合绿化覆盖率、绿色容积率、CO2固定量等作为衡量绿化的指标比较适宜的。同时,文章也为用来衡量绿化生态效果的CO2固定量的计算方法和相关绿化标准制定提供了一种思路。

STUDY ON THE APPLICABILITY OF GREEN SPACE RATIO AS THE EVALUATION INDEX OF GREEN QUALITY FOR TRADITIONAL COURTYARD AREA

Green space ratio has been widely used as the evaluation index of green quality for an area in city planning and construction. Although this evaluation index is suitable for most modern construction projects, it is very difficult for most projects located in traditional courtyard area to meet the established standard. This paper analyzes the reasons, compares a traditional courtyard area with a modern residential quarter on their carbon dioxide (CO2) sequestration values of green space, and concludes that green space ratio is not a good measurement for green space of courtyard area, and that the number of trees, integrated green coverage rate, green plot ratio, and CO2 sequestration may be more suitable to evaluate green quality in the courtyard area. Meanwhile, a method for calculating CO2 sequestration and making a more feasible evaluation index for green space is also presented.