Unsaturated Infiltration Model of Dagu River Bed

YANG Fan; WU Guizhi; FENG Zengshuai; HUANG Mingxiang

doi:10.13961/j.cnki.stbctb.2017.06.025

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Unsaturated Infiltration Model of Dagu River Bed

- Unsaturated Infiltration Model of Dagu River Bed
- Bulletin of Soiland Water Conservation Vol. 37, Issue 6, Pages: 152-156(2017)
- 作者机构：
  
  青岛理工大学环境与市政工程学院,山东,青岛,266033
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.06.025
  CLC：
- Published：2017
- 稿件说明：
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YANG Fan, WU Guizhi, FENG Zengshuai, et al. Unsaturated Infiltration Model of Dagu River Bed[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 152-156.
DOI：

YANG Fan, WU Guizhi, FENG Zengshuai, et al. Unsaturated Infiltration Model of Dagu River Bed[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 152-156. DOI： 10.13961/j.cnki.stbctb.2017.06.025.

摘要

[目的]研究季节性河流大沽河河道包气带入渗过程及入渗参数，建立适宜描述季节性河道入渗模型。[方法]以大沽河上、中、下游3处代表性河床野外垂向入渗试验数据为基础，利用Matlab软件对Horton模型、Kostiakov模型、Philip模型进行拟合，求得模型入渗参数，并评价模型的适宜性。[结果]①随上、中、下游沙样孔隙度、粒径、渗透系数依次减小，干容重依次增大，其稳定入渗速率依次减小，约为0.006 6，0.004 1，0.002 5 cm/s；② Matlab软件中Isqcurvefit函数适用于求模型入渗参数；③ Horton模型对上、中、下游河床入渗过程拟合系数最高。[结论]Horton模型对入渗过程拟合效果最好，且模型参数具有物理意义，适宜描述季节性河床入渗过程。

Abstract

[Objective] This paper studied the infiltration process and infiltration parameters of the Dagu River aeration zones in the seasonal river

and established a suitable model for describing the seasonal river infiltration.[Methods] Based on the experimental data of vertical infiltration of 3 representative rivers on the upper

middle and lower reaches of Dagu River

Horton model

Kostiakov model and Philip model were fitted by Matlab software

the infiltration parameters were obtained

and the suitability of the infiltration model was evaluated.[Results] ① In the upper

middle and lower reaches

with the successive decreases of sand porosity

particle size

permeability coefficient

dry bulk density increased correspondingly

and the steady infiltration rate decreased

with rates of 0.006 6

0.004 1

0.002 5 cm/s. ② The Isqcurvefit function in Matlab software was applied to obtain infiltration parameters of infiltration model. ③ The Horton model had the highest fitting coefficients for the infiltration process of the upper

middle and lower reaches of the river bed.[Conclusion] The Horton model performed the best in the simulation of infiltration process

and the model parameters have virtual physical meaning

and can be used to describe the infiltration process of seasonal river bed.

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