Runoff and Sediment Characteristics of Flood Event in Typical Watershed on the Loess Plateau Based on Vegetation Restoration

HAN Yong; YANG Qiannan; GAO Haidong; XU Hao

doi:10.13870/j.cnki.stbcxb.2023.04.034

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Runoff and Sediment Characteristics of Flood Event in Typical Watershed on the Loess Plateau Based on Vegetation Restoration

更新时间：2025-03-12

- Runoff and Sediment Characteristics of Flood Event in Typical Watershed on the Loess Plateau Based on Vegetation Restoration
- Vol. 37, Issue 4, Pages: 278-283(2023)
- 作者机构：
  
  1. 安康学院旅游与资源环境学院,陕西,安康,725000
  2. 西安理工大学旱区生态水文与灾害防治国家林业和草原局重点实验室,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.04.034
  CLC： S157.1
- Published：2023
- 稿件说明：
移动端阅览
HAN Yong, YANG Qiannan, GAO Haidong, et al. Runoff and Sediment Characteristics of Flood Event in Typical Watershed on the Loess Plateau Based on Vegetation Restoration[J]. 2023, 37(4): 278-283.
DOI：

HAN Yong, YANG Qiannan, GAO Haidong, et al. Runoff and Sediment Characteristics of Flood Event in Typical Watershed on the Loess Plateau Based on Vegetation Restoration[J]. 2023, 37(4): 278-283. DOI： 10.13870/j.cnki.stbcxb.2023.04.034.

摘要

研究大规模植被恢复条件下岔巴沟流域次洪水沙变化

对揭示黄土高原土壤侵蚀演变规律和黄河水沙调控具有重要作用。基于101场洪水事件

结合NDVI和降雨数据

通过分析不同生态建设时期岔巴沟流域次洪水沙变化特征

选取2场典型洪水事件进行对比

揭示次洪输沙与径流侵蚀能量的关系。结果表明:时期Ⅱ的次洪平均径流量是时期I的1.86倍

但平均输沙量仅为0.52倍。在4个洪峰流量分级中

时期I的次洪平均输沙模数明显高于时期Ⅱ。与NO.2洪水事件相比

NO.100洪水事件的径流过程和输沙过程具有良好的同步性

洪水历时更长

洪峰流量、输沙峰值明显较低。时期I和Ⅱ的次洪输沙模数均随径流侵蚀功率的增加而增加

但时期Ⅱ的输沙模数整体低于时期I。研究结果表明大规模植被恢复对黄土高原典型流域次洪输沙的调控作用较径流更为显著。

Abstract

To analyze runoff and sediment change of flood event in the Chabagou watershed under the condition of large-scale vegetation restoration plays an important role in revealing the evolution law of soil erosion on the Loess Plateau and the regulation of runoff and sediment in the Yellow River. Based on 101 flood events

combined with NDVI and rainfall data

the paper analyzed runoff and sediment characteristics of flood event in Chabagou watershed during different ecological construction periods

and selected two typical flood events for comparison to reveal the relationship between sediment transport and runoff erosion energy. The results showed that the average runoff amount of flood event in Period Ⅱ was 1.86 times that of Period I

but the average sediment yield was only 0.52 times. In the four peak discharge classifications

the average sediment transport modulus of flood event in Period I was significantly higher than that in Period Ⅱ. Compared with the flood event NO.2

the runoff and sediment transport process of NO.100 in Period Ⅱ showed good synchronization

and the flood duration was longer. In addition

the peak flow and peak sediment transport were significantly lower. The sediment transport modulus of flood event in both periods I and Ⅱ increased with the increase of runoff erosion power

but the sediment transport modulus in Period Ⅱ was lower than that in Period I. The results showed that large-scale vegetation restoration played a more significant role in regulating sediment transport of flood event than runoff in typical watershed on the Loess Plateau.

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