Effects of Gully Land Consolidation Project on CN in Catchments with Different Vegetation Coverage

Li Xingyao; Zhang Genguang; Gao Jianen; Gao Zhe; Ma Huigang; Feng Boyan; Ma Lin

doi:10.13961/j.cnki.stbctb.2021.04.008

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Effects of Gully Land Consolidation Project on CN in Catchments with Different Vegetation Coverage

- Effects of Gully Land Consolidation Project on CN in Catchments with Different Vegetation Coverage
- Bulletin of Soiland Water Conservation Vol. 41, Issue 4, Pages: 54-60(2021)
- 作者机构：
  
  1. 西北农林科技大学水利与建筑工程学院, 陕西杨凌,712100
  2. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
  3. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.04.008
  CLC： P334.92
- Published：2021
- 稿件说明：
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Li Xingyao, Zhang Genguang, Gao Jianen, et al. Effects of Gully Land Consolidation Project on CN in Catchments with Different Vegetation Coverage[J]. Bulletin of Soiland Water Conservation, 2021, 41(4): 54-60.
DOI：

Li Xingyao, Zhang Genguang, Gao Jianen, et al. Effects of Gully Land Consolidation Project on CN in Catchments with Different Vegetation Coverage[J]. Bulletin of Soiland Water Conservation, 2021, 41(4): 54-60. DOI： 10.13961/j.cnki.stbctb.2021.04.008.

摘要

[目的] 探究黄土丘陵沟壑区沟道土地整治后流域径流曲线数的变化规律，寻求合适的产流参数，为该区沟道土地整治工程安全和巩固生态建设成果提供科学支撑。[方法] 基于流域实体比尺模型分析不同植被覆盖条件下沟道土地整治对流域径流曲线数的影响。[结果] 同一植被覆盖度下，流域径流曲线数随着整治比例的增大而减小；与未整治流域相比，整治比例为20%时的流域径流曲线数减小了6.77；就分段整治比例而言，流域径流曲线数的减小速率随着整治比例的增大呈先增大后减小的趋势，整治比例由0.5%增大至5%时减小速率最大；不同植被覆盖度下，流域径流曲线数均随着整治比例的增大而减小，植被覆盖度为50%时沟道土地整治后流域径流曲线数的减小速率最大；植被覆盖度对沟道土地整治区域的径流曲线数影响显著，同一整治比例下，植被覆盖度每增大1%，沟道土地整治区域的径流曲线数减小0.22。[结论] 沟道土地整治可以改变流域下垫面，对径流曲线数影响显著。

Abstract

[Objective] The variation of runoff curve number after the gully land consolidation project (GLCP) was studied to explore the appropriate flow generation parameters

and to provide scientific support for the safety of GLCP and the consolidation of achievements in ecological construction. [Methods] Based on the physical scale model

the influence of GLCP on the runoff curve number under different vegetation cover conditions was investigated. [Results] Under the same vegetation coverage

the runoff curve number decreased with the increase of the land consolidation proportion. Compared with the unconsolidated basin

the runoff curve number decreased by 6.77 when the consolidation proportion was 20%. The decreasing rate of runoff curve number increased firstly and then decreased with the increase of land consolidation proportion

and the decrease rate reached the maximum when the consolidation proportion increased from 0.5% to 5%. Under different vegetation coverage

the runoff curve number decreased with the increase of consolidation proportion

and the decreasing rate of runoff curve number reached the maximum at the vegetation coverage of 50%. Vegetation coverage had great effects on the runoff curve number of the gully land consolidation area

and the runoff curve number decreased by 0.22 in the gully land consolidation area when the vegetation coverage increased by 1%. [Conclusion] The GLCP could change the hydrological characteristics of basin under layer and has significant effects on the runoff curve number.

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references

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