摘要
中国西北干旱区水资源供需矛盾突出,屋面降水作为一种较为清洁的水资源,对缓解目前西北地区用水紧张很有帮助。以西北地区新疆石河子市天富名城小区为例,利用GF-2号卫星数据,通过图像分类获取研究区土地利用现状图,在所得现状图的基础上,利用Sketchup三维建模软件设计出了一个符合中国西北地区气候特点的屋面降水利用生态工程案例。通过对构建的屋面降水利用模型的运行过程进行推演,得出研究小区95 164.21 m^2的屋面面积年平均可收集15 441.76 m^3净降水。若收集的降水按2.1元/m^3计算,则每年小区可节约3.24万元的水费开支。若将这些降水用于小区景观和绿化,该水量除了可维持一个半径44 m、水深1.5 m的景观水池从4月到10月的全部用水外,还可为小区所有乔木和26%灌草绿化提供免费用水。研究结果可为中国西北小区屋面降水利用系统的推广提供可行性方案和参考。
The contradiction of water resources is very prominent between supply and demand in arid areas,northwest of China. Roof precipitation is taken as a kind of relatively clean water resource. It is very helpful for northwest region to alleviate water tension. Take Tian-fu residential community of Xinjiang Shihezi city as an example. The present land use map was obtained by image classification of GF-2 satellite data. On the basis of the present land map,the ecological engineering case of roof precipitation system,which meet the climate characteristics of northwest China,was designed by using Shetchup3 D software. Based on the the constructed roof precipitation utilization system,the water about 15 441.76 m3 can be collected yearly by the residential roof 95 164. 21 m2. If local water rate was calculated at 2. 1 $/m3,it can save water fee32 400 $ each year for Tian-fu residential community. If the collected water was used to landscape and green water,it can not only maintain a landscape pool which has 44 m semidiameter and 1.5 m deep all water use from April to October every year,but also it can provide free water for all the trees and 26% shrub rangeland in the residential community. The results can provide feasible scheme and reference for promoting the implementation of roof precipitation system in northwest China.
作者
孙雪
李静
陈实
程勇翔
韩忠玲
SUN Xue;LI Jing;CHEN Shi;CHENG Yongxiang;HAN Zhongling(Shihezi University, Shihezi 832000, China;The Xinjiang Uygur Autonomous Region Agricultural Technology Extension Station, Urumqi 830000,China)
出处
《黑龙江生态工程职业学院学报》
2018年第3期31-36,共6页
Journal of Heilongjiang Vocational Institute of Ecological Engineering
基金
石河子大学高层次人才启动项目(CZX201429)
关键词
干旱区
屋面降水
收集利用
生态工程
Arid Region
Roof Precipitation
Collection and Utilization
Ecological Engineering
