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固原市玫瑰苑小区低影响开发措施改造对降雨径流的调控效益
贾斌凯1, 李怀恩1, 黄绵松2, 孙文靖1, 党菲1, 付德宇2
1.西安理工大学 西北旱区生态水利国家重点实验室, 陕西 西安 710048;2.宁夏首创海绵城市建设发展有限公司, 宁夏 固原 756000
摘要:
[目的] 计算住宅小区海绵改造后对降雨径流的调控效益,旨在为海绵城市建设提供技术参考。[方法] 结合宁夏回族自治区固原市某住宅小区各低影响开发(low impact development,LID)设施的布设情况,计算不同设计降雨量下LID设施对降雨径流的截蓄量与各LID设施截蓄容积的利用率;再结合固原市2004-2014年的降雨资料,计算出该小区年均降雨径流总截蓄量与各LID措施对降雨径流的截蓄量。基于计算出的小区LID设施对降雨径流的截蓄数据,结合资源环境经济学原理,计算小区降雨径流年调控效益、单方降雨径流调控效益与各LID措施年均降雨径流调控效益。[结果] 小区海绵改建后,年均降雨径流调蓄量增加11 568 m3,产生的效益为111 302元/a,单方降雨径流调控效益为9.62元/m3;各LID设施年均效益分别为:雨水花园45 273元/a,下沉式绿地27 103元/a,雨水桶6 654元/a,雨水池32 272元/a。[结论] 住宅小区海绵改建能够有效控制小区降雨径流的外排量,提高小区年径流总量控制率,具有明显的经济、环境和社会效益。
关键词:  住宅小区  海绵改造  降雨径流调蓄  效益计算  LID效益
DOI:10.13961/j.cnki.stbctb.2020.01.019
分类号:X196
基金项目:固原海绵城市建设及运营关键技术研究项目"固原市海绵城市建设效益分析计算"(SCHM-2018)
Regulation and Control Benefits of Rainfall-Runoff by Low Impact Development Measures in a Residential District of Guyuan City
Jia Binkai1, Li Huaien1, Huang Miansong2, Sun Wenjing1, Dang Fei1, Fu Deyu2
1.State Key Laboratory of Eco-hydraulic Engineering in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, China;2.Ningxia Capital Sponge City Construction & Development CO., Ltd, Guyuan, Ningxia 756000, China
Abstract:
[Objective] The regulation and control benefits of rainfall-runoff after sponge reconstruction in residential districts were calculated to provide a technical reference for sponge city construction.[Methods] The interception capacity of rainfall-runoff and the utilization rate of low impact development (LID) facilities was calculated under different rainfall intensities, based on LID facilities in a residential district of Guyuan City, Ningxia Hui Autonomous Region. The total annual rainfall-runoff interception capacity and the rainfall-runoff interception capacity of each LID were measured using the rainfall data of Guyuan City from 2004 to 2014. The annual rainfall-runoff control benefit of each LID was determined using the calculated rainfall-runoff interception and storage capacity data of LID facilities, the resource and environment economics, the annual regulation benefit, and the unilateral rainfall-runoff control benefit.[Results] After sponge reconstruction, the average annual rainfall-runoff storage increased by 11 568 m3, the benefit was 111 302 yuan per year, and the benefit of unilateral rainfall-runoff control was 9.62 yuan/m3. The average annual benefits for each LID facility were 45 273 yuan per year for a rain water garden, 27 103 yuan per year for a sunken green space, 6 654 yuan per year for a rain water bucket, and 32 272 yuan per year for a rain pool.[Conclusion] Sponge reconstruction in residential areas can effectively control the external displacement of rainfall-runoff and improve the total annual runoff control rate, which has economic, environmental, and social benefits.
Key words:  residence community  sponge transformation  rainfall-runoff regulation and storage  benefit calculation  low impact development (LID) benefit