Effect of Forest and Grass Cover Change on Runoff Mechanism in Jialu River Basin

HU Caihong; RAN Guang; JIAN Shengqi

doi:10.13870/j.cnki.stbcxb.2020.02.006

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Effect of Forest and Grass Cover Change on Runoff Mechanism in Jialu River Basin

更新时间：2025-03-12

- Effect of Forest and Grass Cover Change on Runoff Mechanism in Jialu River Basin
- Vol. 34, Issue 2, Pages: 36-42(2020)
- 作者机构：
  
  郑州大学水利科学与工程学院,郑州,450001
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.02.006
  CLC： S715.3
- Published：2020
- 稿件说明：
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HU Caihong, RAN Guang, JIAN Shengqi. Effect of Forest and Grass Cover Change on Runoff Mechanism in Jialu River Basin[J]. 2020, 34(2): 36-42.
DOI：

HU Caihong, RAN Guang, JIAN Shengqi. Effect of Forest and Grass Cover Change on Runoff Mechanism in Jialu River Basin[J]. 2020, 34(2): 36-42. DOI： 10.13870/j.cnki.stbcxb.2020.02.006.

摘要

以黄土高原佳芦河流域为研究区，收集整理了1966—2006年的水文气象资料，选取了60场洪水数据，在分析其洪水过程线、产流特征值、产流机制等因素的基础上，结合近30年来佳芦河流域林草覆被的变化情况，综合分析了佳芦河流域林草覆被对流域产流机制变化的响应机理，期望揭示黄河流域水沙减少的原因。结果表明，近30年来，佳芦河流域径流量骤减，相比60年代，2000年以后佳芦河流域年平均径流量减少近75.0%，林草覆盖率从8.0%增加到35.0%，流域蓄水容量随植被盖度的增大呈上升趋势。3个阶段1966—1975年、1976—1996年及1997—2006年流域超渗产流为主的洪水场次所占比例分别为72.8%，65.0%和60.0%，呈下降趋势；1997—2006年内混合及蓄满产流为主的洪水场次与1966—1975年相比分别增加8.4%和4.3%。研究结果有助于深入认识黄河流域主要水土流失区的产水规律，揭示黄河水量变化的机制，为该区开展生态建设提供科学依据。

Abstract

Taking the Jialu River Basin of the Loess Plateau as the study area

this study collected the hydrometeorological data from 1966 to 2006

meanwhile selected 60 flood data to analyze the flood process line

runoff characteristic value

and runoff generation mechanism. Combined with the changes of forest and grass vegetation in Jialu River Basin in the past 30 years

the response relationship between vegetation coverage and watershed runoff mechanism was analyzed comprehensively

which revealed the reason for the dramatical water and sediment reduction in the Yellow River Basin. The results showed that in the past 30 years

the volume of runoff and sediment in the Jialu River Basin decreased sharply. Compared with the 1960s

the annual average volume of runoff was abated by about 75.0%

the vegetation coverage rate increased from 8.0% to 35.0% and the watershed storage capacity of the basin had the same growth trend with the vegetation coverage. The proportions of floods dominated by runoff formation in excess of infiltration in the three stages(1966-1975

1976-1996

1997-2006) was 72.8%

65.0% and 60.0%

respectively; however

compared with the period of 1966 to 1975

the proportions of floods dominated by runoff formation at the natural storage were increased by 8.4%

4.3% respectively during 1997 to 2006. The research results would help to realize the runoff law of the main water and soil loss areas in the Yellow River Basin

reveal the mechanism of water changes in the Yellow River

and provide a scientific basis for ecological construction in the area.

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