不同坡度下城市回填土壤径流系统中水力水质分配特征

石; 于江华; 徐礼强; 方; 石文祥

doi:10.13870/j.cnki.stbcxb.2017.02.024

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不同坡度下城市回填土壤径流系统中水力水质分配特征

更新时间：2024-11-07

- 不同坡度下城市回填土壤径流系统中水力水质分配特征
- A Preliminary Study on the Distribution Characteristics of Hydraulics and Water Quality in the Runoff System of the Urban Backfill Soil with Different Slope Gradients
- 水土保持学报 2017年31卷第2期页码：137-141
- 作者机构：
  
  1. 江苏省大气环境与装备技术协同创新中心，南京信息工程大学环境科学与工程学院,南京,210044
  2. 水利部珠江水利研究院,广州,510611
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目(41401546)广东省自然科学基金项目（2015A030313866）江苏高校品牌专业建设工程项目（PPZY2015C222）
- DOI：10.13870/j.cnki.stbcxb.2017.02.024
  中图分类号： S152.7
- 纸质出版：2017
- 稿件说明：
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石, 于江华, 徐礼强, 等. 不同坡度下城市回填土壤径流系统中水力水质分配特征[J]. 水土保持学报, 2017,31(2):137-141.

SHI Fei1, YU Jianghua1, XU Liqiang2, et al. A Preliminary Study on the Distribution Characteristics of Hydraulics and Water Quality in the Runoff System of the Urban Backfill Soil with Different Slope Gradients[J]. 2017, 31(2): 137-141.
石, 于江华, 徐礼强, 等. 不同坡度下城市回填土壤径流系统中水力水质分配特征[J]. 水土保持学报, 2017,31(2):137-141. DOI： 10.13870/j.cnki.stbcxb.2017.02.024.

SHI Fei1, YU Jianghua1, XU Liqiang2, et al. A Preliminary Study on the Distribution Characteristics of Hydraulics and Water Quality in the Runoff System of the Urban Backfill Soil with Different Slope Gradients[J]. 2017, 31(2): 137-141. DOI： 10.13870/j.cnki.stbcxb.2017.02.024.

摘要

采用人工降雨装置，对不同坡度下城市回填土壤径流系统中氮磷的分配特征进行了试验研究。结果表明：坡度对不同归趋分配有较大影响，无坡度时无地表径流产生，有坡度后地表径流所占比例明显增加。坡度为4°时地表径流、侧渗流与下渗流所占比例分别为72.5%，25.3%，2.3%。坡度增加到8°以上时全部以地表径流的形式出现。坡度为4°时地表径流、下渗流与侧渗流中总氮的比例分别为69.7%，26.1%，4.2%，总磷所占比例分别为77.6%，22.0%，0.4%。随着坡度的增加，地表径流中污染物质的百分含量略有增加，但变化不大。因此在设计回填土草地时应尽量使其平整以有效促进土壤水分下渗，减少地表径流，减少城市回填土的氮磷污染。

Abstract

Artificial rainfall experiments were carried out to investigate the distribution characteristics of nitrogen and phosphorus in runoff system of urban backfill soils of different slope gradients. The results showed that soil slope had a significant effect on hydraulic distribution. Specifically

when the slope was 4°

the proportion of surface runoff

side-percolation flow

and down-percolation flow was 72.5%

25.3%

and 2.3%

respectively. However

the surface runoff was prominent when the slope reaches 8°. Furthermore

for the slope of 4°

the percentage of total nitrogen in the surface runoff

side-percolation flow

and down-percolation flow was 69.7%

26.1%

and 4.2%

respectively. Meanwhile

the proportion of total phosphorus was 77.6%

22%

and 0.4%

respectively. The proportion of nutrients in surface runoff increased slightly with increasing slop gradient. Therefore

in the design of backfill soil

smoothing the surface would be beneficial to improve soil water infiltration

reduce surface runoff

and decrease nitrogen and phosphorus pollution of urban backfill soil.

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