Evolutionary trend of water cycle in Beichuan River Basin of China under the influence of vegetation restoration

Liang Zhu; Jing-tao Liu; Ming-nan Yang; Yu-xi Zhang; De-ping Wen

doi:10.19637/j.cnki.2305-7068.2021.03.003

Volume 9 Issue 3

Sep. 2021

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Article Navigation > Journal of Groundwater Science and Engineering > 2021 > 9(3): 202-211

Liang Zhu, Jing-tao Liu, Ming-nan Yang, et al. 2021: Evolutionary trend of water cycle in Beichuan River Basin of China under the influence of vegetation restoration. Journal of Groundwater Science and Engineering, 9(3): 202-211. doi: 10.19637/j.cnki.2305-7068.2021.03.003

Citation:

Liang Zhu, Jing-tao Liu, Ming-nan Yang, et al. 2021: Evolutionary trend of water cycle in Beichuan River Basin of China under the influence of vegetation restoration. Journal of Groundwater Science and Engineering, 9(3): 202-211. doi: 10.19637/j.cnki.2305-7068.2021.03.003

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Evolutionary trend of water cycle in Beichuan River Basin of China under the influence of vegetation restoration

doi: 10.19637/j.cnki.2305-7068.2021.03.003

Liang Zhu¹,
Jing-tao Liu^{1, 2
,
,},
Ming-nan Yang^{1, 2},
Yu-xi Zhang^{1, 2},
De-ping Wen³

1.
Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China
2.
Key Laboratory of Groundwater Contamination and Remediation, China Geological Survey & Hebei Province, Shijiazhuang 050061, China
3.
Qinghai Provincial Flood and Drought Disaster Prevention Service Center, Xining 810001, China

More Information

Corresponding author: liujingtao@mail.cgs.gov.cn
Received Date: 2021-04-22
Accepted Date: 2021-07-13

Available Online: 2021-09-22

Publish Date: 2021-09-28

Abstract

Abstract

To understand the influence of vegetation restoration on the water cycle in semiarid areas, the effects of vegetation restoration on evolution of the key elements of water cycle were clarified by analyzing the evolutionary trend of atmospheric precipitation, ecological consumption water, and surface runoff on a river basin scale on the basis of analytical results of the changes in vegetation coverage and the long-term meteorological and hydrological monitoring data of Beichuan River Basin. The results show that the vegetation cover in the Beichuan River basin has rapidly increased in the hilly and mountainous areas since the 1980s, especially from 2000 to 2019, with the maximum and average vegetation cover rates increased by 14.98% and 52.2%, respectively. During 1956-2016, the annual precipitation in the basin remained relatively stable; the annual surface runoff slightly declined, with an average attenuation rate of 20 million m³/10a. The main reason for the runoff decline is the increase in ecological water induced by the vegetation restoration, which has changed the spatial-temporal distribution of the water from atmospheric precipitation in the basin. Spatially, more precipitation was converted into ecological water. As a result, the remnant runoff supplied to the lower reaches reduced accordingly. Temporally, more precipitation participated in the soil water - groundwater cycle, thus prolonging the outward drainage period of the precipitation. Moreover, the large-scale vegetation restoration induced a significant decrease in the surface wind speed, evaporation from water surface and drought index. As a result, a virtuously mutual feedback relationship was formed between the vegetation and meteorological elements. Therefore, vegetation restoration is of great significance for the improvement in the water conservation capacity and semiarid climate conditions in the Beichuan River basin.
- Vegetation coverage,
- Water cycle in a river basin,
- Ecological water consumption,
- Water conservation

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References(24)

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