坡形对黑土区坡耕地土壤侵蚀的模型模拟研究

赵紫远; 方海燕; 武亚冰; 蔡强国

doi:10.13870/j.cnki.stbcxb.2022.06.004

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坡形对黑土区坡耕地土壤侵蚀的模型模拟研究

更新时间：2025-03-12

- 坡形对黑土区坡耕地土壤侵蚀的模型模拟研究
- Simulating the Impact of Slope Shapes on Soil Erosion for the Black Soil Region, Northeastern China
- 水土保持学报 2022年36卷第6期页码：23-29
- 作者机构：
  
  1. 中国科学院大学资源与环境学院,北京,100049
  2. 中国科学院地理科学与资源研究所陆地水循环与地表过程重点实验室,北京,100101
  3. 辽宁师范大学地理科学学院,辽宁,大连,116029
- 作者简介：
- 基金信息：
  
  国家重点研发计划项目(2021YFD1500703);国家自然科学基金项目(41977066)
- DOI：10.13870/j.cnki.stbcxb.2022.06.004
  中图分类号： S157.1
- 纸质出版：2022
- 稿件说明：
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赵紫远, 方海燕, 武亚冰, 等. 坡形对黑土区坡耕地土壤侵蚀的模型模拟研究[J]. 水土保持学报, 2022,36(6):23-29.

ZHAO Ziyuan, FANG Haiyan, WU Yabing, et al. Simulating the Impact of Slope Shapes on Soil Erosion for the Black Soil Region, Northeastern China[J]. 2022, 36(6): 23-29.
赵紫远, 方海燕, 武亚冰, 等. 坡形对黑土区坡耕地土壤侵蚀的模型模拟研究[J]. 水土保持学报, 2022,36(6):23-29. DOI： 10.13870/j.cnki.stbcxb.2022.06.004.

ZHAO Ziyuan, FANG Haiyan, WU Yabing, et al. Simulating the Impact of Slope Shapes on Soil Erosion for the Black Soil Region, Northeastern China[J]. 2022, 36(6): 23-29. DOI： 10.13870/j.cnki.stbcxb.2022.06.004.

摘要

为探究黑土区不同坡形下的土壤侵蚀特征

基于黑龙江省粮食沟小流域9个耕地径流场侵蚀产沙数据

采用WEPP (Water Erosion Prediction Project)模型进行土壤侵蚀预报与情景模拟。结果表明:径流量和产沙的整体模拟效果较好

径流量决定系数(R2)与纳什系数(NSE)分别为0.71和0.60

产沙决定系数(R2)与纳什系数(NSE)分别为0.61和0.50

表明该模型对该区土壤侵蚀模拟具有较好的适用性。而模型模拟精度则随坡度增大而减小

在3°

5°和8°坡度下

泥沙模拟的NSE分别为0.60

0.55和0.48

R2分别为0.65

0.61和0.60

这与较陡坡度条件下坡面细沟发育有关;径流量在不同坡度坡形下无明显差异

相同降雨、不同坡形下的径流差异普遍在10%以内

而产沙量在不同坡度坡形上呈现较大差异

相同降雨、不同坡形下的产沙差异普遍在20%左右

最高可达到90%以上;同一坡度条件下

直形坡的土壤侵蚀强度最大

次之为凸形坡

而"S"形坡的土壤侵蚀强度最小。该研究结果可以为我国东北黑土区水土保持措施提供科学依据。

Abstract

The black soil in northeastern China is suffering severe soil erosion

which is greatly impacted by slope shapes. In this paper

based on the measured runoff and sediment data derived from 15 erosive rainfalls in 2014—2015 on 9 runoff plots in the Liangshigou catchment

Keshan County

the WEPP (Water Erosion Prediction Project) was used to explore the impacts of different slope shapes on soil erosion characteristics

and meaningful results were obtained. The determination coefficient (R2) and Nash-Sutcliffe efficiency (NSE) of the overall runoff depth and sediment yield simulation results were both greater than 0.5

and the model was suitable for soil erosion simulation for the black soil region under natural rainfall conditions. For both runoff depth and sediment yield

the simulation accuracies of the WEPP model decreased with increasing slope degrees. For the simulated sediment yields from different slopes

the R2 and NSE decreased from 0.60 and 0.65 on 3° slope

0.55 and 0.61 on 5° slope

and 0.48 and 0.60 on 8° slope

respectively. The soil erosion intensities were closely related to the slope shapes. The simulated runoff depths had no obvious difference on different shaped slopes

but the simulated soil erosion intensity was the highest on the straight slope

followed by the convex slope

and the smallest sediment yield on the S-shaped slope. This study can help soil erosion control for the black soil region

northeastern China.

关键词

Keywords

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