MA Xing-guan,JI Wen-juan,WANG Meng-qi,et al.Analysis on Critical Parameters of Control Measure of Waterlogging Source in Shenyang City[J].Research of Soil and Water Conservation,2014,21(03):201-207.
沈阳市雨涝源头控制措施关键影响因素分析
- Title:
- Analysis on Critical Parameters of Control Measure of Waterlogging Source in Shenyang City
- Keywords:
- control measure of waterlogging source; area proportion; depth; storage-infiltration efficiency
- 分类号:
- TU991.11+4
- 摘要:
- 基于沈阳市1975—2005年降雨统计数据，通过芝加哥降雨过程线法建立沈阳市的设计暴雨雨型模型，研究了土壤稳定入渗速率K、一系列重现期P条件下的低势绿地下凹深度Δh、低势绿地面积率f与渗蓄率N的关系，分析了低势绿地设计的关键参数Δh和f的合理范围。结果表明：沈阳市降雨强度随着降雨历时先增大后减小，主体表现为单峰雨型，降雨历时在48 min时降雨强度达到最大。在一定的降雨强度条件下，Δh和f越大，K值越高，低势绿地的渗蓄效果越明显。为了保证实际降雨的完全下渗，K选取较低值1.0×10-6 m/s；居民区绿化面积在15%~20%范围内时，低势绿地下凹深度宜在230~250 mm；工业区绿化面积在20%~40%范围内时，低势绿地下凹深度宜在120~250 mm。如果通过土壤改良将K提高到5×10-6 m/s，下凹深度100~250 mm即可使得沈阳市98%的降雨量有效渗蓄。
- Abstract:
- Based on the rainfall statistical data from 1975 to 2005 in Shenyang City, design of storm rainfall patterns of the city was established by Keifer&Chu. The relationship between area proportion (f) and storage-infiltration efficiency (N) of low elevation greenbelt was investigated under the condition of constant infiltration rate (K), a serious of the design storm recurrence interval (P) and depth (Δh). The reasonable ranges of the critical parameters, Δh and f, were analyzed. The results showed that the rainfall intensity increases firstly and then decreases with rainfall durations, exhibiting a peak design storm rainfall, where the heaviest rainfall intensity appears at 48 min of rainfall durations. Under the special rainfall intensity, the value of K increases with Δh and f, reflecting more remarkable storage-infiltration performance. In order to ensure a complete infiltration for actual rainfall, the smaller value of K of 1.0×10-6 m/s was selected. In such case, the Δh should be 230~250 mm for residential area with the f of 15%~20%, while it should be 120~250 mm for industrial area with the f of 20%~40%. If the K increases to 5×10-6 m/s by soil improvement, Δh among the range of 100~250 mm can achieve an effective storage and infiltration for 98% of rainfall events in Shenyang City.
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备注/Memo
收稿日期:2013-07-15;改回日期:2013-10-16。
基金项目:国家水体污染控制与治理重大科技专项基金资助项目（2012ZX07505-002-02；2012ZX07505-004-01；2012ZX07208-012-05；2009ZX07208-002-005）；住房和城乡建设部科技发展基金资助项目（2011-k6-13）
作者简介:马兴冠(1972-),男,辽宁省大连市人,博士,教授,主要从事环境工程及环境科学研究。E-mail:hj_mxg@sjzu.edu.cn
通讯作者:纪文娟(1987-),女,甘肃天水人市,硕士研究生,主要从事雨水资源化利用及城市内涝控制研究。E-mail:winjuj@163.com