Modelling of the trade-off between the deep soil moisture and vegetation restoration in the hilly area of the Loess Plateau, China

被引：0
|
作者：
Chang, Yuqing [1 ]
Han, Lei [1 ,2 ]
Chen, Rui [1 ]
Liu, Zhao [1 ]
Li, Yabei [1 ]
Zhao, Zilin [1 ]
Gao, Yifeng [1 ]
Yang, Meili [1 ]
Cao, Xinxin [1 ]
Miao, Zheyuan [1 ]
Kang, Hongliang [1 ]
机构：
[1] School of Land Engineering, Shaanxi Key Laboratory of Land Consolidation, Chang'an University, Xi'an, China
[2] State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS, Xi'an, China
来源：
Journal of Hydrology | 2024年 / 645卷
关键词：
Excessive depletion of soil moisture by artificial forests in the vegetation restoration areas of the Loess Plateau has attracted widespread attention. To assess potential risks of soil moisture deficit; we needed on-site vegetation and soil sampling data; as well as UAV images from the Chaigou Watershed for three-dimensional analysis; combining both sampling and raster data. Three-dimensional surfaces for assessment of trade-off were established innovatively by the local regression and interpolation methods. The results indicated that soil moisture benefits at 20–40 cm depth are lower than at 0–20 cm due to infiltration and surface disturbance. In some areas of the Chaigou Watershed; grass and shrub-grass vegetation are facing risks of soil moisture deficit based on trade-off values (RSMD) and multiparameter evaluations. Analysis of deep soil water content variability revealed the moisture decreases significantly with the deepening of the soil layer in some plots. R (Richness); H (Shannon's Diversity); Margalef; COHESION; and CONTAG were applicable in interpolation and fitted with the local regression model (R2 > 0.6) corresponding to the trade-off; but SPLIT was proven to be inapplicable in this study area. The zero trade-off inflection points were 6 %–8 %; while the trend inflection points were 7.5 %–9 % for soil moisture and vegetation indices of vegetation and landscape in typical sampling sites of the Chaigou Watershed. Three-dimensional fitting model is more comprehensive and effective in assessing deep soil moisture conditions and grass plots on shady slopes generally had the best trade-off status in this region. © 2024 The Author(s);
D O I：
10.1016/j.jhydrol.2024.132274
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