基于湿润区分层假定对Green-Ampt模型的改进

doi:10.19640/j.cnki.jtau.2018.03.017

天津农学院学报 ›› 2018, Vol. 25 ›› Issue (3): 78-83.doi: 10.19640/j.cnki.jtau.2018.03.017

基于湿润区分层假定对Green-Ampt模型的改进

李泳霖^1,2, 王仰仁^{1,2,通信作者}, 孙小平³, 郑志伟^1,2

1. 天津农学院水利工程学院,天津 300384;
2. 天津市节水灌溉技术与装备校企协同创新实验室,天津 300384;
3. 山西省水利水电科学研究院,太原 030012

收稿日期:2018-05-01 出版日期:2018-09-20 发布日期:2019-11-12
通讯作者: 王仰仁（1962-）,男,教授,博士,主要从事灌溉排水技术研究。E-mail：wyrf@163.com。
作者简介:李泳霖（1994-）,男,硕士在读,主要从事灌溉排水理论与新技术研究。E-mail：335985474@qq.com。
基金资助:
国家自然科学基金项目（51779174）; 天津市农业科技成果转化与推广项目（201701150）; 天津市科技计划项目（17YFZC SF00930）; 山西省水利科学技术研究与推广项目（201618）

Improvement of Green-Ampt model based on layered assumptions in wetting regions

LI Yong-lin^1,2, WANG Yang-ren^{1,2,Corresponding Author}, SUN Xiao-ping³, ZHENG Zhi-wei^1,2

1. College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300384, China;
2. University-Enterprise Collaborative Innovation Laboratory of Water-Saving Irrigation Technology and Equipment, Tianjin 300384, China;
3. Shanxi Institute of Water Resources and Hydropower Research, Taiyuan 030012, China

Received:2018-05-01 Online:2018-09-20 Published:2019-11-12

摘要/Abstract

摘要： 假定入渗过程分为前期、后期两个阶段,入渗前期土壤饱和区与非饱和区厚度之比为一常数2β,非饱和区厚度随着入渗的进行而逐渐增大;入渗后期非饱和区的厚度不再随时间变化,为一定值,只有饱和区厚度随时间变化,基于此对Green-Ampt模型进行了改进。用传统Green-Ampt模型和改进模型对6组入渗测试资料进行拟合,传统模型拟合的相关系数为0.982（6组数据的平均值）,相比传统模型,改进模型的拟合精度明显提高,相关系数提高了0.016,达到0.998（对应β=15）;其中两组数据的效果尤为明显,相关系数分别提高了0.07和0.04,均达到了0.99以上。改进模型与传统模型同样具有较强的物理意义,但与传统模型相比,改进模型拟合得到的稳定入渗率更接近于测试值,具有更广泛的适用性。

关键词: Green-Ampt入渗模型, 累计入渗量, 非饱和区, 入渗锋, 入渗时间

Abstract: It is assumed that the infiltration process is divided into two stages of pre-infiltration and post-infiltration. The ratio of soil saturated zone to unsaturated zone is a constant 2β in the pre-infiltration stage, and the thickness of unsaturated zone increases with infiltration. The thickness of unsaturated zone in the post-infiltration stage no longer changes with time, which is a fixed value,and only the thickness of saturated zone changes with time. Based on this, Green-Ampt model is improved. The traditional Green-Ampt model and improved model were used to fit six groups of infiltration test data. The correlation coefficient of traditional model fitting was 0.982（the average of six groups of data）. Compared with the traditional model, the fitting accuracy of the improved model was obvious. The correlation coefficient was increased by 0.016, reaching 0.998 （corresponding to β=15）. The data of two groups were especially effective, which were increased by 0.07 and 0.04 respectively, both reaching over 0.99. The improved model has the same strong physical meaning as the traditional model. However, compared with the traditional model, the stable infiltration rate obtained by the improved model is closer to the test value and the improved model has wider applicability.

Key words: Green-Ampt infiltration model, accumulated infiltration capacity, unsaturated zone, infiltration front, infiltration time

中图分类号:

S275

李泳霖, 王仰仁, 孙小平, 郑志伟. 基于湿润区分层假定对Green-Ampt模型的改进[J]. 天津农学院学报, 2018, 25(3): 78-83.

LI Yong-lin, WANG Yang-ren, SUN Xiao-ping, ZHENG Zhi-wei. Improvement of Green-Ampt model based on layered assumptions in wetting regions[J]. Journal of Tianjin Agricultural University, 2018, 25(3): 78-83.

导出引用管理器 EndNote|Reference Manager|ProCite|BibTeX|RefWorks

链接本文: http://xuebao.tjau.edu.cn/CN/10.19640/j.cnki.jtau.2018.03.017

http://xuebao.tjau.edu.cn/CN/Y2018/V25/I3/78

参考文献

[1] Green W H,Ampt G A.Studies on soil physics: Flow of air and water through soils[J].Journal of Agriculture Science,1911,4(1):1-24.
[2] 雷志栋,杨诗秀,谢森传. 土壤水动力学[M]. 北京:清华大学出版社,1998.
[3] 赵伟霞,张振华,蔡焕杰,等.恒定水头井入渗Green-Ampt模型的改进与验证[J].水利学报,2010,41(4):464-470.
[4] 郭向红,孙西欢,马娟娟,等.不同入渗水头条件下的Green-Ampt模型[J].农业工程学报,2010,26(3):64-68.
[5] 马娟娟,孙西欢,郭向红. 基于Green-Ampt模型的变水头积水入渗模型建立及其参数求解[J]. 水利学报,2010,41(01):61-67.
[6] 刘姗姗,白美建,许迪,等. Green-Ampt模型参数简化及土壤物理参数的关系[J].农业工程学报,2012,28(1):106-110.
[7] Coleman E A,Bodman G B.Moisture and energy conditions during downward entry of water into moist and layered soils[J].Soil Sci Soc Amer Proc,1945,9(C):3-11.
[8] Ma Y,Feng S Y,Su D Y,et al.Modeling water infiltration in a large layered soil column with a modifies green-ampt model and HYDRUS-1D[J]. Computers and Electronics in Agriculture,2010,71(s1):S40-S47.
[9] Bouwer H.Rapid field measurement of air-entry value and hydraulic conductivity of soil as significant parameters in flow system analysis[J].Water Resources Research, 1966,2(4):729-738.
[10] Bouwer H.Infiltration of water into non-uniform soil[J]. Journal of Irrigation and Drainage Engineering,1969,95(IR4):451-462.
[11] 毛丽丽,雷廷武,刘汗,等. 用水平土柱和修正的Green-Ampt模型确定土壤的入渗性能[J].农业工程学报,2009,25(11):35-40.
[12] 王文焰,王全九,张建丰,等. 甘肃秦王川地区土壤水分运动参数及相关性[J].水土保持学报,2002,16(3):110-113.
[13] 彭振阳,黄介生,伍靖伟,等. 基于分层假设的Green-Ampt模型改进[J]. 水科学进展,2012,23(1):59-66.
[14] 周鑫洋,王仰仁,刘群昌. 四个入渗公式对农田潮土的适应性研究[J]. 灌溉排水学报,2015,34(8):96-100.
[15] 沈洪政,王仰仁,韩娜娜. 非线性入渗模型求参中参数初始值确定方法研究[J]. 中国农村水利水电,2017 (10):183-187.

基于湿润区分层假定对Green-Ampt模型的改进

Improvement of Green-Ampt model based on layered assumptions in wetting regions

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 8

编辑推荐

Metrics

本文评价

[1]	豆静静, 郑志伟, 高卓卓. 变化初始含水率条件下土壤入渗特性试验及模拟研究[J]. 天津农学院学报, 2023, 30(2): 11-17.
[2]	聂万虹, 代瀚哲, 冯子瑶, 张平平, 王艺颖. 板栗黄芪饮料活性物质及抗氧化活性研究[J]. 天津农学院学报, 2023, 30(1): 18-21.
[3]	高卓卓, 郑志伟, 豆静静. 基于畦田双侧灌水条件下灌水参数优化研究[J]. 天津农学院学报, 2022, 29(4): 65-69.
[4]	邸志刚, 杨路华, 许欣然, 苟万里. 提水灌区灌溉水价分析及水文年对工程收益的影响研究[J]. 天津农学院学报, 2019, 26(1): 80-84.
[5]	许欣然, 杨路华, 陈凯, 王子健. 地形坡度下滴灌毛管铺设长度及灌水小区进口压力分析[J]. 天津农学院学报, 2017, 24(4): 61-63.
[6]	沈洪政, 刘文炜, 王仰仁, 刘莉, 许欣然, 田晶. 灌溉用多孔管极限长度分析研究[J]. 天津农学院学报, 2016, 23(2): 33-35.
[7]	姚丽, 王仰仁, 战国隆, 牛少卿. 基于室内试验的土壤入渗深度动态模拟研究[J]. 天津农学院学报, 2019, 26(4): 83-88.
[8]	王宁, 叶澜涛, 周青云, 李松敏, 刘帆. 滨海盐碱地滴灌玉米生长指标及产量研究[J]. 天津农学院学报, 2019, 26(4): 89-94.