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1.宁夏大学 地理科学与规划学院, 宁夏 银川 750021
2.中阿旱区特色资源与环境治理国际合作联合实验室, 宁夏 银川 750021
3.宁夏旱区资源评价与环境调控重点实验室, 宁夏 银川 750021
Received:07 April 2025,
Revised:2025-06-11,
Published:10 October 2025
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张维福, 展秀丽, 马思怡, 等.基于Hydrus-1D模型的宁夏河东沙地固定沙丘花棒林土壤水分动态模拟[J].水土保持通报,2025,45(5):267-276.
Zhang Weifu, Zhan Xiuli, Ma Siyi, et al. Simulation of soil moisture dynamics under Hedysarum scoparium forests on fixed sand-dunes in eastern sandy land of Yellow River in Ningxia based on Hydrus-1D model [J]. Bulletin of Soil and Water Conservation,2025,45(5):267-276.
张维福, 展秀丽, 马思怡, 等.基于Hydrus-1D模型的宁夏河东沙地固定沙丘花棒林土壤水分动态模拟[J].水土保持通报,2025,45(5):267-276. DOI: 10.13961/j.cnki.stbctb.2025.05.013. CSTR: 32312.14.stbctb.2025.05.013..
Zhang Weifu, Zhan Xiuli, Ma Siyi, et al. Simulation of soil moisture dynamics under Hedysarum scoparium forests on fixed sand-dunes in eastern sandy land of Yellow River in Ningxia based on Hydrus-1D model [J]. Bulletin of Soil and Water Conservation,2025,45(5):267-276. DOI: 10.13961/j.cnki.stbctb.2025.05.013. CSTR: 32312.14.stbctb.2025.05.013..
目的
2
探究宁夏河东沙地固定沙丘花棒林土壤水分的变化规律,为该区沙漠化持续治理和防沙治沙效果评价提供科学参考。
方法
2
利用Hydrus-1D模型,模拟0—150 cm土壤剖面的土壤水分垂直分布和时间变化特征,并采用决定系数
R
2
、均方根误差RMSE和相对误差RE评价了模型在宁夏河东沙地的适用性。
结果
2
①降雨入渗表现出阈值依赖特征:降雨量小于2.2 mm时,入渗深度小于5 cm,降雨量介于3.6~8.2 mm时,入渗深度介于5~15 cm;降雨量介于10.8~22.8 mm时,入渗深度介于15~30 cm; ②利用Hydrus-1D模型模拟花棒林地不同深度土壤含水量总体模拟效果较好,模拟阶段和验证阶段决定系数分别为0.756和0.773,均方根误差分别为0.071%和0.064%,相对误差分别为0.030%,0.032%;表层5 cm和深层125 cm土壤含水量拟合精度不高,15,30,50,80 cm土壤含水量模拟效果较好,土层决定系数范围为0.571~0.849,均方根误差为0.000 1%~0.042%。
结论
2
不同降雨事件下的入渗效果有所差异,总体上降雨入渗的深度随着降雨量的增加而增加。Hydrus-1D模型模拟的土壤含水量与实测值吻合度较高,并证明该模型适用于模拟宁夏河东沙地土壤剖面的含水量。
Objective
2
Soil moisture spatiotemporal dynamics in fixed sand-dunes (planted with
Hedysarum scoparium
) in eastern Yellow River sandy land in Ningxia Hui Autonomous Region were investigated, to provide scientific insights for sustainable desertification control and effective evaluation of sand stabilization measures.
Methods
2
The HYDRUS-1D model was employed to simulate the vertical distribution (0—150 cm profile) and temporal variations in soil moisture in fixed dunes. The model performance in easte
rn sandy land of Yellow River in Ningxia was evaluated using the coefficient of determination (
R
²), root mean square error (RMSE), and relative error (RE).
Results
2
① Rainfall infiltration exhibited threshold-dependent characteristics: infiltration depth was limited to
<
5 cm when precipitation
<
2.2 mm, 5—15 cm for 3.6—8.2 mm rainfall, and 15—30 cm for 10.8—22.8 mm rainfall. ② The model demonstrated satisfactory performance in simulating soil-water content across most depths (calibration
R
²=0.756, validation
R
²=0.773; RMSE=0.071% and 0.064%; RE=0.030% and 0.032%). Although surface (5 cm) and deep layer (125 cm) simulations showed lower accuracy, intermediate layers (15, 30, 50, and 80 cm) achieved better results (
R
²=0.571—0.849, RMSE=0.0001%—0.042%).
Conclusion
2
The infiltration patterns varied significantly across rainfall events, showing a positive correlation between the amount of precipitation and infiltration depth. The HYDRUS-1D model proved suitable for simulating the soil moisture dynamics in this arid sandy ecosystem, with simulations closely matching field observations.
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