摘要
探讨了草本植物(狗牙根)和灌木(金叶女贞)对黄河粉土水力特性的影响,重点分析了不同降雨强度下植被对土壤含水量和吸力的调控作用。通过一维降雨入渗模型比较植被生长和裸土的水力特性差异。结果显示,植被有效延缓了降雨引起的土体含水量上升和吸力下降,尤其是狗牙根根系(须根系)的延缓作用较强。植被根系生长导致土壤孔隙体积减少,10~30 cm深度范围内的土体饱和含水量低于裸土。VG模型成功拟合了植被土的水分特征曲线(SWCC),显示植被土的持水能力强于裸土,其中狗牙根的持水能力优于金叶女贞。该研究揭示了植被对黄河粉土水力特性的调控机制,为黄河中下游地区的生态恢复与水资源管理提供了科学依据。
In this study,we investigated the effects of herbaceous plants(Cynodon dactylon)and shrubs(Ligustrum vicaryi)on the hydraulic characteristics of silt in the Yellow River,and focused on the regulation of vegetation on soil water content and suction under different rainfall intensities.Through the one-dimensional rainfall infiltration model,the differences in the hydraulic characteristics of vegetation growth and bare soil were compared.The results showed that vegetation effectively delayed the increase of soil water content and the decrease of suction caused by rainfall,especially the root system of Cynodon dactylon(fibrous root)had strong delaying effect.The growth of vegetation roots led to the decrease of soil pore volume,and the saturated water content of soil in the depth range of 10~30 cm was lower than that of bare soil.The VG model successfully fitted the Soil-water characteristic curve(SWCC)of vegetation soil,which showed that the water-holding capacity of vegetation soil was stronger than that of bare soil,and the water-holding capacity of Cynodon dactylon was better than that of Ligustrum vicaryi.This study revealed the regulation mechanism of vegetation on the hydraulic characteristics of the silt of the Yellow River,and provided a scientific basis for ecological restoration and water resources management in the middle and lower reaches of the Yellow River.
作者
解庆贺
周晓林
姚海朋
王冀鹏
商海潮
Xie Qinghe;Zhou Xiaolin;Yao Haipeng;Wang Jipeng;Shang Haichao(China Construction Eighth Engineering Division Second Construction Co.,LTD.,Jinan 250014,China;School of Civil Engineering,Shandong University,Jinan 250061,China)
出处
《黑龙江科学》
2026年第6期1-7,共7页
Heilongjiang Science
关键词
植被
黄河粉土
水力特性
一维入渗
VG模型
Vegetation
Yellow River loess
Hydraulic characteristics
One-dimensional infiltration
VG model
