Change Trend of Water-holding Function in Alpine and Subalpine Regions of Western Sichuan Province

Wang Xuan; Deng Limei; Liu Gangcai; Lu Chuanhao; Dong Xianyong; Zhu Wanze

doi:10.13961/j.cnki.stbctb.2022.01.040

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Change Trend of Water-holding Function in Alpine and Subalpine Regions of Western Sichuan Province

- Change Trend of Water-holding Function in Alpine and Subalpine Regions of Western Sichuan Province
- Bulletin of Soiland Water Conservation Vol. 42, Issue 1, Pages: 303-307(2022)
- 作者机构：
  
  1. 中国科学院山地表生过程与生态调控重点实验室, 中国科学院、水利部成都山地灾害与环境研究所,四川,成都,610041
  2. 中国科学院大学,北京,100049
  3. 中国三峡集团公司,四川,成都,610041
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.01.040
  CLC： S157.1
- Published：2022
- 稿件说明：
移动端阅览
Wang Xuan, Deng Limei, Liu Gangcai, et al. Change Trend of Water-holding Function in Alpine and Subalpine Regions of Western Sichuan Province[J]. Bulletin of Soiland Water Conservation, 2022, 42(1): 303-307.
DOI：

Wang Xuan, Deng Limei, Liu Gangcai, et al. Change Trend of Water-holding Function in Alpine and Subalpine Regions of Western Sichuan Province[J]. Bulletin of Soiland Water Conservation, 2022, 42(1): 303-307. DOI： 10.13961/j.cnki.stbctb.2022.01.040.

摘要

[目的

]

揭示川西亚高山区水源涵养功能的变化趋势，为明确该区的水源涵养动态特征提供科学依据。[方法

]

以岷江上游的杂谷脑河流域为例，根据杂谷脑河流域出口处的历年降水、气温和水沙资料，应用水量平衡原理，研究该流域水源涵养能力的变化特征。[结果

]

①研究区径流量呈明显减少趋势，平均每年减少2.83 mm，即水源涵养量平均每年提升28.3 t/hm

，特别是2000年左右(开始实施生态保护和生态修复工程)至2020年，平均每年减少3.12 mm，即水源涵养量平均每年提升31.2 t/hm

；②径流中的含沙量也呈显著的递减趋势，即表明该区的径流在递减而土壤保持能力在提升；③研究区降水无显著的波动式变化，表明径流减少不是降水导致的。[结论

]

生态保护和生态修复等生态工程对水源涵养有明显的促进作用。

Abstract

[Objective] The changing trend of water-holding function in a subalpine area of Western Sichuan Province was analyzed in order to provide a scientific basis for defining the dynamic characteristics of water conservation in this area. [Methods] Taking the Zagunao River basin in the upper reaches of the Minjiang River as an example

the variation characteristics of water conservation capacity of the Zagunao River basin were studied based on precipitation

temperature

water

and sediment data collected at the outlet of the Zagunao River basin and by using the principle of water balance. [Results] ① Runoff was significantly reduced over time

with an average annual decrease of 2.83 mm (i.e.

water-holding capacity increased by 28.3 t/ha annually)

especially around year 2000 (when the ecological protection and ecological restoration project started) to 2020 when the average annual decrease was 3.12 mm (i.e.

water-holding capacity increased by 31.2 t/ha annually); ② Sand content in the runoff also showed a significant decreasing trend

indicating that runoff in the area was decreasing while soil conservation capacity was increasing; ③ There was no significant fluctuation trend in precipitation over the study period

indicating that the observed runoff decrease was not caused by precipitation changes. [Conclusion] Ecological engineering

such as ecological protection and restoration

plays an obvious role in promoting water conservation.

关键词

Keywords

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