Data underlying the research of Water infiltration into subcritically water-repellent soils with time-dependent contact angle

*** Water infiltration into subcritically water-repellent soils with time-dependent contact angle ***Authors: Z.F. Wang, R. WallachThe Department of Soil and Water Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel <br>Corresponding author: R. Wallach Contact Information:[e-mail] Robert H Smith Facultyof Food, Agriculture and EnvironmentP.O. Box 12 Rehovot 76100 ISRAEL<br>***General Introduction***This dataset contains data collected during downward infiltration experiments at Hebrew University of Jerusalem<br>It is being made public both to act as supplementary data for publications and in order for other researchers to use this data in their own work.<br>The data in this data set was collected at the Department of Soil and Water Sciences - The Robert H. Smith Faculty of Agriculture, Food and Environment.<br>***Purpose of the test campaign***The purpose of these experiments was to investigate the effects of time-dependent contact angle on water infiltration into subcritically water-repellent soils.<br>***Test equipment***The contact angle was measured for sessile drops placed on uncoated, ethanol coated and oleic acid–ethanol solution-coated glass beads using a goniometer (EasyDrop DSA20E, Hamburg, Germany). Infiltration experiments for three glass beads were carried out in 60 cm glass-bead column under ponding condition with a constant water head of 3 cm.<br><br>***Description of the data in this data set***The data included in this data set has been organised as:<br>Figure 1. Time-dependent contact angle, CA(t), for: (a) Clean glass beads; (b) Ethanol coated glass beads; (c) Oleic-acid coated glass beads <br>Figure 2. Wetting front position versus time for:(a)Clean glass beads; (b)Ethanol coated glass beads; (c)Oleic-acid coated glass beads <br>Figures 3a and 3b. ql versus l and l versus t data plot for clean glass beads.<br>Figures 3c and 3d. ql versus l and l versus t data plot for ethanol coated glass beads.<br>Figures 4a and 4b. ql versus l and l versus t data plot for oleic-acid coated glass beads.<br>MATLAB code for time-dependent-CA Green-Ampt model using the measured data in Figure 4 as an example.<br>

*** 时变接触角条件下亚临界疏水土壤的水分入渗 ***
作者：Z.F. 王、R. 沃拉赫
以色列希伯来大学罗伯特·H·史密斯农业、食品与环境学院水土科学系，雷霍沃特
<br>通讯作者：R. 沃拉赫，联系方式：[e-mail]
通讯单位：以色列雷霍沃特76100邮政信箱12号，罗伯特·H·史密斯食品、农业与环境学院
<br>*** 通用介绍 ***
本数据集包含在耶路撒冷希伯来大学开展的向下水分入渗实验所采集的数据。本数据集公开的目的一是作为已发表论文的补充数据，二是供其他研究人员在其研究中使用。本数据集的数据采集于罗伯特·H·史密斯农业、食品与环境学院水土科学系。
<br>*** 试验目的 ***
本系列实验旨在探究时变接触角对亚临界疏水土壤水分入渗的影响。
<br>*** 试验设备 ***
采用接触角测量仪（goniometer，EasyDrop DSA20E，德国汉堡）测定静置液滴（sessile drop）在未涂层、乙醇涂层以及油酸-乙醇溶液涂层玻璃珠表面的接触角（contact angle）。采用60 cm高的玻璃珠柱体，在恒定水头为3 cm的积水条件（ponding condition）下开展了三种玻璃珠的入渗实验。
<br><br>*** 数据集内容说明 ***
本数据集包含的数据整理如下：
图1 时变接触角CA(t)：(a) 洁净玻璃珠；(b) 乙醇涂层玻璃珠；(c) 油酸涂层玻璃珠
图2 湿润锋位置随时间的变化：(a) 洁净玻璃珠；(b) 乙醇涂层玻璃珠；(c) 油酸涂层玻璃珠
图3a和3b：洁净玻璃珠的ql与l、l与t关系数据图
图3c和3d：乙醇涂层玻璃珠的ql与l、l与t关系数据图
图4a和4b：油酸涂层玻璃珠的ql与l、l与t关系数据图
附带以图4的实测数据为例的、用于时变接触角格林-安普特（Green-Ampt）模型的MATLAB代码。