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

doi:10.13961/j.cnki.stbctb.2022.01.040

Home > Archive>Volume 42, Issue 1, 2022 >303-307,316. DOI:10.13961/j.cnki.stbctb.2022.01.040

Change Trend of Water-holding Function in Alpine and Subalpine Regions of Western Sichuan Province
DOI:
                        10.13961/j.cnki.stbctb.2022.01.040
                    
Author:
                        Wang XuanWang Xuan
Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu, Sichuan 610041, China;University of Chinese Academy of Sciences, Beijing 100049, China
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Deng LimeiDeng Limei
Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu, Sichuan 610041, China;University of Chinese Academy of Sciences, Beijing 100049, China
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Liu GangcaiLiu Gangcai
Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu, Sichuan 610041, China
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Lu ChuanhaoLu Chuanhao
Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu, Sichuan 610041, China;University of Chinese Academy of Sciences, Beijing 100049, China
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Dong XianyongDong Xianyong
China Three Gorges Corporation, Chengdu, Sichuan 610041, China
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Zhu WanzeZhu Wanze
Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu, Sichuan 610041, China
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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.

Key words:subalpine;water-holding capacity;change trend;ecosystem;Western Sichuan Province

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汪璇,邓丽梅,刘刚才,陆传豪,董先勇,朱万泽.川西亚高山区域的水源涵养功能变化趋势[J].水土保持通报英文版,2022,42(1):303-307,316

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Received:August 25,2021
Revised:October 08,2021
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Online: March 12,2022
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