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Title: Estimation of bare soil evaporation for different depths of water table in the wind-blown sand area of the Ordos Basin, China

Abstract

Soil surface evaporation is a significant component of the hydrological cycle, occurring at the interface between the atmosphere and vadose zone, but it is affected by factors such as groundwater level, soil properties, solar radiation and others. In order to understand the soil evaporation characteristics in arid regions, a field experiment was conducted in the Ordos Basin, central China, and high accuracy sensors of soil moisture, moisture potential and temperature were installed in three field soil profiles with water-table depths (WTDs) of about 0.4, 1.4 and 2.2 m. Soil-surface-evaporation values were estimated by observed data combined with Darcy’s law. Results showed that: (1) soil-surface-evaporation rate is linked to moisture content and it is also affected by air temperature. When there is sufficient moisture in the soil profile, soil evaporation increases with rising air temperature. For a WTD larger than the height of capillary rise, the soil evaporation is related to soil moisture content, and when air temperature is above 25 °C, the soil moisture content reduces quickly and the evaporation rate lowers; (2) phreatic water contributes to soil surface evaporation under conditions in which the WTD is within the capillary fringe. This indicates that phreatic water would not participate in soil evaporationmore » for a WTD larger than the height of capillary rise. This finding developed further the understanding of phreatic evaporation, and this study provides valuable information on recognized soil evaporation processes in the arid environment.« less

Authors:
 [1];  [2]; ; ; ; ;  [1]
  1. Chang’an University, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education (China)
  2. Chang’an University, School of Environmental Science and Engineering (China)
Publication Date:
OSTI Identifier:
22780862
Resource Type:
Journal Article
Journal Name:
Hydrogeology Journal
Additional Journal Information:
Journal Volume: 26; Journal Issue: 5; Other Information: Copyright (c) 2018 Springer-Verlag GmbH Germany, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1431-2174
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; ACCURACY; AIR; CAPILLARIES; CHINA; ECONOMICS; EVAPORATION; GROUND WATER; HYDROLOGY; MOISTURE; MOISTURE GAGES; SAND; SOILS; SOLAR RADIATION; WATER TABLES; WIND

Citation Formats

Chen, Li, Wang, Wenke, Zhang, Zaiyong, Wang, Zhoufeng, Wang, Qiangmin, Zhao, Ming, and Gong, Chengcheng. Estimation of bare soil evaporation for different depths of water table in the wind-blown sand area of the Ordos Basin, China. United States: N. p., 2018. Web. doi:10.1007/S10040-018-1774-6.
Chen, Li, Wang, Wenke, Zhang, Zaiyong, Wang, Zhoufeng, Wang, Qiangmin, Zhao, Ming, & Gong, Chengcheng. Estimation of bare soil evaporation for different depths of water table in the wind-blown sand area of the Ordos Basin, China. United States. doi:10.1007/S10040-018-1774-6.
Chen, Li, Wang, Wenke, Zhang, Zaiyong, Wang, Zhoufeng, Wang, Qiangmin, Zhao, Ming, and Gong, Chengcheng. Wed . "Estimation of bare soil evaporation for different depths of water table in the wind-blown sand area of the Ordos Basin, China". United States. doi:10.1007/S10040-018-1774-6.
@article{osti_22780862,
title = {Estimation of bare soil evaporation for different depths of water table in the wind-blown sand area of the Ordos Basin, China},
author = {Chen, Li and Wang, Wenke and Zhang, Zaiyong and Wang, Zhoufeng and Wang, Qiangmin and Zhao, Ming and Gong, Chengcheng},
abstractNote = {Soil surface evaporation is a significant component of the hydrological cycle, occurring at the interface between the atmosphere and vadose zone, but it is affected by factors such as groundwater level, soil properties, solar radiation and others. In order to understand the soil evaporation characteristics in arid regions, a field experiment was conducted in the Ordos Basin, central China, and high accuracy sensors of soil moisture, moisture potential and temperature were installed in three field soil profiles with water-table depths (WTDs) of about 0.4, 1.4 and 2.2 m. Soil-surface-evaporation values were estimated by observed data combined with Darcy’s law. Results showed that: (1) soil-surface-evaporation rate is linked to moisture content and it is also affected by air temperature. When there is sufficient moisture in the soil profile, soil evaporation increases with rising air temperature. For a WTD larger than the height of capillary rise, the soil evaporation is related to soil moisture content, and when air temperature is above 25 °C, the soil moisture content reduces quickly and the evaporation rate lowers; (2) phreatic water contributes to soil surface evaporation under conditions in which the WTD is within the capillary fringe. This indicates that phreatic water would not participate in soil evaporation for a WTD larger than the height of capillary rise. This finding developed further the understanding of phreatic evaporation, and this study provides valuable information on recognized soil evaporation processes in the arid environment.},
doi = {10.1007/S10040-018-1774-6},
journal = {Hydrogeology Journal},
issn = {1431-2174},
number = 5,
volume = 26,
place = {United States},
year = {2018},
month = {8}
}