Effects of Engineering Measures on the Runoff and Sediment Yield in Slope Land Under Different Rainfall Intensities

CAO Yuan; SUN Peng; YAO Rui; WANG Junhong; FENG Anlan; HU Yuqian

doi:10.13870/j.cnki.stbcxb.2020.06.001

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Effects of Engineering Measures on the Runoff and Sediment Yield in Slope Land Under Different Rainfall Intensities

更新时间：2025-03-12

- Effects of Engineering Measures on the Runoff and Sediment Yield in Slope Land Under Different Rainfall Intensities
- Vol. 34, Issue 6, Pages: 1-7(2020)
- 作者机构：
  
  1. 安徽师范大学地理与旅游学院,安徽,芜湖,241002
  2. 南京师范大学虚拟地理环境教育部重点实验室,南京,210023
  3. 霍山县水土保持试验站, 安徽霍山,237266
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.06.001
  CLC： S157.1
- Published：2020
- 稿件说明：
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CAO Yuan, SUN Peng, YAO Rui, et al. Effects of Engineering Measures on the Runoff and Sediment Yield in Slope Land Under Different Rainfall Intensities[J]. 2020, 34(6): 1-7.
DOI：

CAO Yuan, SUN Peng, YAO Rui, et al. Effects of Engineering Measures on the Runoff and Sediment Yield in Slope Land Under Different Rainfall Intensities[J]. 2020, 34(6): 1-7. DOI： 10.13870/j.cnki.stbcxb.2020.06.001.

摘要

基于试验站不同坡地措施（坡耕地和坡改梯）2016年和2017年的逐日降水、产流产沙数据，研究不同坡地措施和雨强下产流产沙规律特征，定量揭示坡改梯和坡耕地对产流产沙的影响。结果表明：（1）7月平均雨强I、最大雨强I30及坡地产流量最大，8月最大雨强I60与坡地产沙量最大，表明坡地产流产沙高峰期与雨强高峰期一致。（2）春夏两季产流、产沙量与I、I30和I60相关性显著（超过95%置信度检验）。其中坡耕地产流产沙量与I、I30、I60的相关系数整体高于坡改梯。春夏季坡耕地产沙量分别是坡改梯的3.91，7.85倍。（3）降雨主要集中在I（1~3 mm/h）、I30（3~29 mm/h）、I60（2~27 mm/h）之间，且坡地产流产沙量与最大雨强I30、最大雨强I60在95%置信度水平呈现显著正相关。当I30达到29.0 mm/h、I60达到26.6 mm/h时，坡地产流产沙达到最大，坡耕地产流产沙峰值是坡改梯的2.43，7.52倍以上，并且坡耕地全年产流产沙变异系数总体高于坡改梯，因此坡改梯工程在一定程度上防治了水土流失，使产流产沙变化减小。

Abstract

Based on the daily precipitation and runoff sediment yield data in 2016 and 2017 under different slope land measures (slope farmland and changing slope to terrace) in the test station

the law characteristics of runoff sediment yield under different slope land measures and rainfall intensities were studied. The impact of changing slope to terrace and slope farmland on runoff and sediment was quantitatively revealed. The results showed that: (1) In July

the average rainfall intensity I

the maximum rainfall intensity I30 and the slope land runoff were the largest

and in August

the maximum rainfall intensity I60 and the slope land sediment yield were the largest

indicating that the peak of runoff and sediment was the same as the peak of rainfall intensities. (2) The correlations between runoff and sediment yield in spring and summer and I

I30 and I60 were significant (more than 95% confidence test). The correlation coefficients in slope land were higher than those in changing slope to terrace land. In spring and summer

the sediment yields in slope land were 3.91 and 7.85 times of those in changing slope to terrace land. (3) The rainfall was mainly concentrated in I: 1~3 mm/h

I30: 3~29 mm/h

I60: 2~27 mm/h

and the runoff and sediment yield in slope land was positively correlated with the maximum rainfall intensity I30 and I60 at 95% confidence level. When I30 reached 29.0 mm/h

I60 reached 26.6 mm/h

the runoff and sediment yield in slope land reached the maximum. The peak values of runoff and sediment yield in slope land were 2.43

7.52 times higher than those in changing slope to terrace land. The variation coefficients of runoff and sediment yield in the whole year were higher than those in changing slope to terrace land. Thus

changing slope land to terrace could prevent soil erosion to a certain extent

and reduce the variation of runoff and sediment yield.

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