Evaluating the Benefits of Different Soil and Water Conservation Measures Under Heavy Rainfall Conditions in the Suburban Areas of Beijing

YANG Runze; FENG Tianjiao; XIAO Huijie; WANG Fenzhong; ZHAO Zekun; WANG Shilei; ZHU Junying

doi:10.13870/j.cnki.stbcxb.2022.01.002

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Evaluating the Benefits of Different Soil and Water Conservation Measures Under Heavy Rainfall Conditions in the Suburban Areas of Beijing

更新时间：2025-03-12

- Evaluating the Benefits of Different Soil and Water Conservation Measures Under Heavy Rainfall Conditions in the Suburban Areas of Beijing
- Vol. 36, Issue 1, Pages: 8-17(2022)
- 作者机构：
  
  1. 北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室,北京,100083
  2. 北京市密云区水土保持工作站,北京,101500
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.01.002
  CLC： S157.2
- Published：2022
- 稿件说明：
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YANG Runze, FENG Tianjiao, XIAO Huijie, et al. Evaluating the Benefits of Different Soil and Water Conservation Measures Under Heavy Rainfall Conditions in the Suburban Areas of Beijing[J]. 2022, 36(1): 8-17.
DOI：

YANG Runze, FENG Tianjiao, XIAO Huijie, et al. Evaluating the Benefits of Different Soil and Water Conservation Measures Under Heavy Rainfall Conditions in the Suburban Areas of Beijing[J]. 2022, 36(1): 8-17. DOI： 10.13870/j.cnki.stbcxb.2022.01.002.

摘要

以石匣小流域水土保持科技示范园10个不同水土保持措施配置模式的径流小区为研究对象

分析当地2004—2019年降雨格局变化

并以发生在2010—2018年的19次代表性强降雨作为样本降雨事件

探究不同配置模式对土壤侵蚀与面源污染特征的影响。结果表明: (1)2004-2019年降雨量变化范围在331.4~598.9 mm

平均年降雨量484 mm

小雨、中雨的发生频率降低

大雨的发生频率增加。(2)水土保持措施在减流减沙、减少养分流失方面效果明显。在减轻地表径流方面

表现最好的配置模式为鱼鳞坑苜蓿地与玉米梯田

其减流率分别为88.59%

88.40%;在减少泥沙方面

最好的配置模式为玉米梯田

减沙率高达97.82%;在降低面源污染方面

表现最好的配置模式为玉米梯田

其对TN、TP、COD的减少率分别为79.57%

75.90%

91.31%。(3)在强降雨条件下

降雨量与产流产沙量、TN、TP、COD均呈正相关关系

且降雨量与径流量、径流系数相关性较强

Abstract

Ten runoff plots with different configuration patterns of soil and water conservation measures in Shixia watershed Soil and Water Conservation Technology Demonstration Park were used as the study objects

and the changes in local rainfall patterns from 2004-2019 were firstly analyzed. In addition

19 representative heavy rainfall events occurring in 2010-2018 were used as sample rainfall events to explore the effects of different configuration patterns on soil erosion and non-point source pollution characteristics. The results showed that: (1) Rainfall variation from 2004-2019 ranged 331.4~598.9 mm

with an average annual rainfall of 484 mm

a decrease in the frequency of light and moderate rainfall

and an increase in the frequency of heavy rainfall. (2) Soil and water conservation measures were effective in reducing flow and sediment and nutrient loss. In terms of reducing surface runoff

the best configuration models were fish scale pit clover fields and maize terraces

with flow reduction rates of 88.59% and 88.40% respectively; in terms of reducing sediment

the best configuration model was maize terraces

with a sediment reduction rate of 97.82%; in terms of reducing non-point source pollution

the best-performing configuration model was maize terraces

whose reduction rates for TN

TP and COD were 79.57%

75.90% and 91.31% respectively. (3) Under heavy rainfall conditions

rainfall was positively correlated with flow production and sediment production

TP and COD

and the correlation between rainfall and runoff volume and runoff coefficient were higher

with correlation coefficients of 0.608 and 0.553 respectively. I30 and I60 were more highly correlated with flow production and sediment production and COD. In addition

the correlations of rainfall ephemeris and I60 with TN

TP and COD were also high. The results of the study provide a reference basis for revealing the soil erosion mechanism of slopes under heavy rainfall conditions in suburban areas of Beijing

and at the same time provide a scientific basis for local work on soil and water conservation under heavy rainfall.

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