A Quantitative Study on Spatial Distribution of Rain Flood Pattern in Luohe Planning Area

BAI Tian; WU Yawen; JIN Muqing; ZHENG Linlin; TIAN Guohang

doi:10.13961/j.cnki.stbctb.2018.05.043

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A Quantitative Study on Spatial Distribution of Rain Flood Pattern in Luohe Planning Area

- A Quantitative Study on Spatial Distribution of Rain Flood Pattern in Luohe Planning Area
- Bulletin of Soiland Water Conservation Vol. 38, Issue 5, Pages: 269-274(2018)
- 作者机构：
  
  河南农业大学林学院,河南,郑州,450002
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.05.043
  CLC： TP391;P426.616
- Published：2018
- 稿件说明：
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BAI Tian, WU Yawen, JIN Muqing, et al. A Quantitative Study on Spatial Distribution of Rain Flood Pattern in Luohe Planning Area[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 269-274.
DOI：

BAI Tian, WU Yawen, JIN Muqing, et al. A Quantitative Study on Spatial Distribution of Rain Flood Pattern in Luohe Planning Area[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 269-274. DOI： 10.13961/j.cnki.stbctb.2018.05.043.

摘要

[目的]探索城市雨洪格局空间分布规律，为海绵城市建设提供参考。[方法]建立GIS数据库，ArcGIS空间模拟与SCS-CN，SWMM模型相结合，定量分析20 a重现期和2 h，85.43 mm降雨，漯河规划区产流和积水分布特征。[结果]研究区径流量和径流系数（相等）、径流体积、峰值流量、积水区域的自相关Moran’s I系数分别为0.338（p<0.001），0.142（p<0.001），0.101（p<0.001），0.918（p<0.001），表明产流与积水分布均呈现显著集聚性，土地类型和管网分布对产流影响大于积水过程，而地形影响则相反；径流量和径流系数由中心向外递减趋势，径流体积与峰值流量受汇水区面积和城市管网分布影响；高产流风险区不透水面占该区域82.73%，径流系数 > 0.7和不透水面 > 70%的汇水区集中在城市中心；积水区用地类型以农业用地、城市绿地、道路用地为主，分别占总面积的36.56%，21.39%，21.82%，分布特征存在显著差异。[结论]城市地表结构变化与城市产流和积水分布关系密切，综合量化方法可以直观地反映城市雨洪格局特征与趋势。

Abstract

[Objective] To explore the spatial distribution of rain flood pattern in order to provide references for the construction of sponge city.[Methods] A GIS database was established

combined with ArcGIS simulation

SCS-CN and SWMM models

the characteristics of runoff and flood distribution were quantitatively analyzed in Luohe planning area.[Results] Total runoff and runoff coefficient (equal)

runoff volume

total peak

inundation area of Moran's I coefficient was 0.338 (p<0.001)

0.142 (p<0.001)

0.101(p<0.001) and 0.918 (p<0.001)

respectively

indicated that the distribution of runoff and inundation had a remarkable agglomeration. The impact of land type and pipe network distribution on runoff was greater than that of accumulated water process

but the influence of topography was opposite. Total runoff and runoff coefficient were decreased from center to outside. Total peak and runoff volume were affected by catchments area and pipe network distribution. The impermeable surface of the runoff high risked area accounted for 82.73% of the total area. The runoff risk decreased from center to outside. The catchment area of runoff coefficient > 0.7 and the inundation area > 70% were concentrated in the urban center. Agricultural land

urban green space and road land were the main types of land use in the inundation area

accounting for 36.56%

21.39% and 21.82% of the total area

respectively

and there were significant difference in the distribution characteristics.[Conclusion] Urban surface change was closely related to the distribution of runoff and inundation. The comprehensive quantification method could directly reflect the characteristics and trends of urban flood pattern.

关键词

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