Variation and Driving Factor of Flow-sediment Relationship in Gushanchuan River Basin at Different Time Scales

JIANG Hongxu; TIAN Peng; MU Xingmin; ZHAO Guangju; HU Jinfei; LIAN Qiuhan; ZHANG Hong

doi:10.13870/j.cnki.stbcxb.2020.02.013

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Variation and Driving Factor of Flow-sediment Relationship in Gushanchuan River Basin at Different Time Scales

更新时间：2025-03-12

- Variation and Driving Factor of Flow-sediment Relationship in Gushanchuan River Basin at Different Time Scales
- Vol. 34, Issue 2, Pages: 86-92(2020)
- 作者机构：
  
  1. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
  2. 西北农林科技大学资源与环境学院, 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：10.13870/j.cnki.stbcxb.2020.02.013
  CLC： P333;S157.2
- Published：2020
- 稿件说明：
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JIANG Hongxu, TIAN Peng, MU Xingmin, et al. Variation and Driving Factor of Flow-sediment Relationship in Gushanchuan River Basin at Different Time Scales[J]. 2020, 34(2): 86-92.
DOI：

JIANG Hongxu, TIAN Peng, MU Xingmin, et al. Variation and Driving Factor of Flow-sediment Relationship in Gushanchuan River Basin at Different Time Scales[J]. 2020, 34(2): 86-92. DOI： 10.13870/j.cnki.stbcxb.2020.02.013.

摘要

以黄土高原孤山川流域为研究区，采用Mann-Kendall趋势检验和Pettitt突变检验分析年际尺度水沙变化趋势和突变年份。结果表明：孤山川径流量和输沙量于1965—2014年呈现极显著减少趋势（p<0.01），突变年份为1979年和1996年，据此将研究时段划分为基准期（1965—1979年）、过渡期（1980—1996年）和效益期（1997—2014年）。同基准期相比，过渡期年均径流深和输沙模数分别减少34.11 mm和401.48 t/km2，效益期减少65.05 mm和213.09 t/km2。径流深低于10 mm时，水沙关系较为离散；高于该值时，水沙关系变化相对稳定。过渡期人类活动的减水减沙贡献率分别为79.12%和86.45%，效益期人类活动减水减沙贡献率分别为86.45%和87.45%。

Abstract

The Gushanchuan Basin of the Loess Plateau was selected as the study area. The interannual variation of flow-sediment relationship and the mutation year were analyzed using the Mann-Kendall and the Pettitt test. The results of the runoff and sediment yield of Gushanchuan showed a significant decrease trend (p<0.01) from 1965 to 2014

and the mutation year was 1979 and 1996

according to which the study period was divided into the reference period (1965-1979)

the transition period (1980-1996)

and the benefit period (1997-2014). Compared with the reference period

the average annual runoff depth and sediment modulus decreased by 34.11 mm and 401.48 t/km2 in the transition period

respectively

and decreased by 65.05 mm and 213.09 t/km2 in the benefit period. When the runoff depth was less than 10 mm

the flow-sediment relationship was discrete. When the runoff depth was more than 10 mm

the flow-sediment relationship was relatively stable. The contribution rates of human activities for runoff and sediment reduction during the transition period were 79.12% and 86.45%

and the contribution increased to 86.45% and 87.45% in benefit period

respectively.

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