Soil Moisture Simulation in Urban Grassland Using HYDRUS-1D—Taking Artifical Grassland in Yangzhou City as an Example

Zhu Chaofan; Huang Jinbai; Gu Zhun; Luo Diwen

doi:10.13961/j.cnki.stbctb.2021.03.017

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Soil Moisture Simulation in Urban Grassland Using HYDRUS-1D—Taking Artifical Grassland in Yangzhou City as an Example

- Soil Moisture Simulation in Urban Grassland Using HYDRUS-1D—Taking Artifical Grassland in Yangzhou City as an Example
- Bulletin of Soiland Water Conservation Vol. 41, Issue 3, Pages: 118-126(2021)
- 作者机构：
  
  扬州大学水利科学与工程学院,江苏,扬州,225127
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.03.017
  CLC： S152.7
- Published：2021
- 稿件说明：
移动端阅览
Zhu Chaofan, Huang Jinbai, Gu Zhun, et al. Soil Moisture Simulation in Urban Grassland Using HYDRUS-1D—Taking Artifical Grassland in Yangzhou City as an Example[J]. Bulletin of Soiland Water Conservation, 2021, 41(3): 118-126.
DOI：

Zhu Chaofan, Huang Jinbai, Gu Zhun, et al. Soil Moisture Simulation in Urban Grassland Using HYDRUS-1D—Taking Artifical Grassland in Yangzhou City as an Example[J]. Bulletin of Soiland Water Conservation, 2021, 41(3): 118-126. DOI： 10.13961/j.cnki.stbctb.2021.03.017.

摘要

[目的

]

研究城市化背景下草地土壤水分运动规律，为提升海绵城市建设水平提供科学依据和技术支撑。[方法

]

以江苏省扬州大学扬子津校区农水与水文生态试验场的人工草地为研究区，利用实测降雨和同期土壤含水量数据对不同降雨事件下的雨水入渗深度进行分析。通过HYDRUS-1D模型对研究区土壤含水量变化过程进行模拟。[结果

]

在小雨（

10 mm）和中雨（10~25 mm）事件中，研究区草地的雨水入渗深度分别小于15 cm和30 cm；在大雨（25~50 mm）到暴雨（>50 mm）事件中，雨水入渗深度通常超过30 cm，或可达60 cm以上；土壤含水量模拟值与实测值的均方根误差范围为0.012～0.034 cm

/cm

。[结论

]

不同等级降雨事件下的草地雨水入渗深度存在明显差异，入渗深度总体上随着降雨量的增加而增加；HYDRUS-1D模型能够准确模拟不同等级降雨事件下的城市人工草地区雨水入渗深度。

Abstract

[Objective] The soil moisture movement in grassland under the background of urbanization was studied in order to provide a scientific basis and technical support for improving the construction level of sponge city. [Methods] The study area was an artificial grassland at the hydraulic and hydro-ecological testing ground

located on the Yangzijin campus of Yangzhou University

Jiangsu Province. Observed rainfall data and soil moisture data were used to analyze infiltration depths under various rainfall events. Soil moisture variation processes at the study area were simulated using the HYDRUS-1D model. [Results] During light rain (<10 mm) and moderate rain (10~25 mm) events

rainfall infiltration depths at the grassland study area were not more than 15 cm and 30 cm

respectively. During heavy rain (25~50 mm) and torrential rain (>50 mm) events

rainfall infiltration depths were always more than 30 cm

and sometimes exceeded 60 cm. Root mean square errors of simulated results against observations ranged from 0.012 cm3/cm3 to 0.034 cm3/cm3. [Conclusion] Rainfall infiltration depths at the grassland area are clearly different under rainfall events with different magnitudes

and infiltration depth can generally increase with increasing rainfall amount. Additionally

the HYDRUS-1D model can accurately simulate rainfall infiltration depths under differing rainfall amounts for urban grassland areas.

关键词

Keywords

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