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Characteristics and Estimation of Dew in the Loess Hilly Region of Northern Shaanxi Province, China

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  • Zhifeng Jia

    (School of Water and Environment, Chang ’an University, Xi’an 710054, China
    Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710054, China
    Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an 710054, China)

  • Yingjie Chang

    (School of Water and Environment, Chang ’an University, Xi’an 710054, China
    Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710054, China
    Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an 710054, China)

  • Hao Liu

    (School of Water and Environment, Chang ’an University, Xi’an 710054, China
    Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710054, China
    Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an 710054, China)

  • Ge Li

    (School of Water and Environment, Chang ’an University, Xi’an 710054, China
    Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710054, China
    Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an 710054, China)

  • Zilong Guan

    (PowerChina Northwest Engineering Corporation Limited, Xi’an 710065, China)

  • Xingchen Zhang

    (PowerChina Northwest Engineering Corporation Limited, Xi’an 710065, China)

  • Ruru Xi

    (School of Water and Environment, Chang ’an University, Xi’an 710054, China
    Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710054, China
    Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an 710054, China)

  • Pengcheng Liu

    (School of Water and Environment, Chang ’an University, Xi’an 710054, China
    Xi’an Water (Group) Lijiahe Reservoir Management Company, Xi’an 710055, China)

  • Yu Liu

    (College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China)

Abstract

As a non-precipitation water source, dew is important for plant and animal survival and crop production in arid and water-scarce areas. This study assessed the amount of dew in a dry zone in a long-term (2016 to 2022) field observation experiment at the Ansai Experimental Station, a typical loess hilly area in China. Dew primarily occurred in summer and autumn, with a frequency of >50%. The average annual dew amount was 29.20 mm, with an average annual rainfall of 641.8 mm. The average annual dew-to-rain ratio was 4.58%, and the average annual number of dew days was 143.6 d/a. The surface soil moisture content increased by approximately 1.02% with increasing dew amounts. The change in the soil moisture at a 5 cm depth was 0.14% on average and lagged substantially by 1 h. Using the Beysens model, the annual estimated and measured dew amounts in 2022 were 25.27 and 29.84 mm, respectively, and the annual normalized root mean square deviation (NRMSD) was 0.17. Thus, the Beysens model evaluated the dew amount in the study area well at the monthly and annual scales. The quantification of dew resources can provide support for the development, utilization, and management of limited water resources in arid areas, promoting more accurate decision-making for the sustainable development of water resources in the future.

Suggested Citation

  • Zhifeng Jia & Yingjie Chang & Hao Liu & Ge Li & Zilong Guan & Xingchen Zhang & Ruru Xi & Pengcheng Liu & Yu Liu, 2024. "Characteristics and Estimation of Dew in the Loess Hilly Region of Northern Shaanxi Province, China," Sustainability, MDPI, vol. 16(6), pages 1-18, March.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:6:p:2482-:d:1358464
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