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Evapotranspiration Characteristics of Forest and Grass Vegetation and Its Response to Environmental Factors on the Loess Plateau

Received: Oct. 19, 2023    Accepted: Nov. 06, 2023    Published: Nov. 13, 2023
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Abstract

In this paper, the evapotranspiration characteristics and water consumption rules of different types of vegetation in tree forest, shrub forest and grassland in the Loess Plateau of Longzhong region were analyzed, and the response relationship between vegetation evapotranspiration and meteorological factors was established by regression analysis method. The results showed that: (1) The monthly variation of Ea values of vegetation in this region showed an obvious inverted U-shaped bimodal variation, which the lowest Ea values were found in the germination stage of vegetation in early April and the dormancy stage of leaf litter in October, and the Ea values increased greatly in May and June with the enhancement of vegetation transpiration and soil evaporation by an average increase of 74.31%. The Ea values of all types of vegetation in this region reached the maximum value in July and August and began to decline significantly from September by an average decrease of 7.42mm and an average decrease of 24.31%. In October, the Ea values of vegetation rapidly decreased to the level of early April by an average decrease of 15.67mm and a decrease of 51.52% compared with August. (2) The difference in the perspective of spatial distribution of evapotranspiration water consumption of vegetation in this region was mainly manifested in the difference between east and west but a little difference between north and south. In Pingliang City, vegetation evapotranspiration water consumption in the east was higher than that in the west, the south was higher than that in the north, and the Jinghe River basin was higher than that in the Hulu River basin. The average difference of the total evapotranspiration water consumption of the same type of vegetation during the growth period was 19.43mm from east to west, 2.2mm from north to south, and 19.43mm from basin to basin. (3) Radiation and precipitation were the main influencing factors of Ea. Among the independent variable factors affecting evapotranspiration of forest and shrub forest, the difference of significance from large to small was the average monthly temperature, average monthly precipitation, average monthly wind speed and average monthly precipitation days. The effect of monthly mean wind speed on grassland Ea was relatively small.

DOI 10.11648/j.sd.20231106.12
Published in Science Discovery ( Volume 11, Issue 6, December 2023 )
Page(s) 189-204
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Forest and Grass Vegetation, Evapotranspiration, Characteristic of Water Consumption, Response of Environmental Factors, The Loess Plateau, Middle-East of Gansu Province

References
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[10] 刘增进, 柴红敏, 李宝萍. 豫西黄土丘陵区林草植被蒸散量估算研究 [J]. 灌溉排水学报, 2012, 31 (03): 99-102+138.
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  • APA Style

    Fu, W., Yan, S. X., Qian, H., Qiang, Z., Fen, H., et al. (2023). Evapotranspiration Characteristics of Forest and Grass Vegetation and Its Response to Environmental Factors on the Loess Plateau. Science Discovery, 11(6), 189-204. https://doi.org/10.11648/j.sd.20231106.12

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    ACS Style

    Fu, W.; Yan, S. X.; Qian, H.; Qiang, Z.; Fen, H., et al. Evapotranspiration Characteristics of Forest and Grass Vegetation and Its Response to Environmental Factors on the Loess Plateau. Sci. Discov. 2023, 11(6), 189-204. doi: 10.11648/j.sd.20231106.12

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    AMA Style

    Fu W, Yan SX, Qian H, Qiang Z, Fen H, et al. Evapotranspiration Characteristics of Forest and Grass Vegetation and Its Response to Environmental Factors on the Loess Plateau. Sci Discov. 2023;11(6):189-204. doi: 10.11648/j.sd.20231106.12

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  • @article{10.11648/j.sd.20231106.12,
      author = {Wang Fu and Sha Xiao Yan and He Qian and Zhao Qiang and Han Fen and Zhang He},
      title = {Evapotranspiration Characteristics of Forest and Grass Vegetation and Its Response to Environmental Factors on the Loess Plateau},
      journal = {Science Discovery},
      volume = {11},
      number = {6},
      pages = {189-204},
      doi = {10.11648/j.sd.20231106.12},
      url = {https://doi.org/10.11648/j.sd.20231106.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.sd.20231106.12},
      abstract = {In this paper, the evapotranspiration characteristics and water consumption rules of different types of vegetation in tree forest, shrub forest and grassland in the Loess Plateau of Longzhong region were analyzed, and the response relationship between vegetation evapotranspiration and meteorological factors was established by regression analysis method. The results showed that: (1) The monthly variation of Ea values of vegetation in this region showed an obvious inverted U-shaped bimodal variation, which the lowest Ea values were found in the germination stage of vegetation in early April and the dormancy stage of leaf litter in October, and the Ea values increased greatly in May and June with the enhancement of vegetation transpiration and soil evaporation by an average increase of 74.31%. The Ea values of all types of vegetation in this region reached the maximum value in July and August and began to decline significantly from September by an average decrease of 7.42mm and an average decrease of 24.31%. In October, the Ea values of vegetation rapidly decreased to the level of early April by an average decrease of 15.67mm and a decrease of 51.52% compared with August. (2) The difference in the perspective of spatial distribution of evapotranspiration water consumption of vegetation in this region was mainly manifested in the difference between east and west but a little difference between north and south. In Pingliang City, vegetation evapotranspiration water consumption in the east was higher than that in the west, the south was higher than that in the north, and the Jinghe River basin was higher than that in the Hulu River basin. The average difference of the total evapotranspiration water consumption of the same type of vegetation during the growth period was 19.43mm from east to west, 2.2mm from north to south, and 19.43mm from basin to basin. (3) Radiation and precipitation were the main influencing factors of Ea. Among the independent variable factors affecting evapotranspiration of forest and shrub forest, the difference of significance from large to small was the average monthly temperature, average monthly precipitation, average monthly wind speed and average monthly precipitation days. The effect of monthly mean wind speed on grassland Ea was relatively small.
    },
     year = {2023}
    }
    

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  • TY  - JOUR
    T1  - Evapotranspiration Characteristics of Forest and Grass Vegetation and Its Response to Environmental Factors on the Loess Plateau
    AU  - Wang Fu
    AU  - Sha Xiao Yan
    AU  - He Qian
    AU  - Zhao Qiang
    AU  - Han Fen
    AU  - Zhang He
    Y1  - 2023/11/13
    PY  - 2023
    N1  - https://doi.org/10.11648/j.sd.20231106.12
    DO  - 10.11648/j.sd.20231106.12
    T2  - Science Discovery
    JF  - Science Discovery
    JO  - Science Discovery
    SP  - 189
    EP  - 204
    PB  - Science Publishing Group
    SN  - 2331-0650
    UR  - https://doi.org/10.11648/j.sd.20231106.12
    AB  - In this paper, the evapotranspiration characteristics and water consumption rules of different types of vegetation in tree forest, shrub forest and grassland in the Loess Plateau of Longzhong region were analyzed, and the response relationship between vegetation evapotranspiration and meteorological factors was established by regression analysis method. The results showed that: (1) The monthly variation of Ea values of vegetation in this region showed an obvious inverted U-shaped bimodal variation, which the lowest Ea values were found in the germination stage of vegetation in early April and the dormancy stage of leaf litter in October, and the Ea values increased greatly in May and June with the enhancement of vegetation transpiration and soil evaporation by an average increase of 74.31%. The Ea values of all types of vegetation in this region reached the maximum value in July and August and began to decline significantly from September by an average decrease of 7.42mm and an average decrease of 24.31%. In October, the Ea values of vegetation rapidly decreased to the level of early April by an average decrease of 15.67mm and a decrease of 51.52% compared with August. (2) The difference in the perspective of spatial distribution of evapotranspiration water consumption of vegetation in this region was mainly manifested in the difference between east and west but a little difference between north and south. In Pingliang City, vegetation evapotranspiration water consumption in the east was higher than that in the west, the south was higher than that in the north, and the Jinghe River basin was higher than that in the Hulu River basin. The average difference of the total evapotranspiration water consumption of the same type of vegetation during the growth period was 19.43mm from east to west, 2.2mm from north to south, and 19.43mm from basin to basin. (3) Radiation and precipitation were the main influencing factors of Ea. Among the independent variable factors affecting evapotranspiration of forest and shrub forest, the difference of significance from large to small was the average monthly temperature, average monthly precipitation, average monthly wind speed and average monthly precipitation days. The effect of monthly mean wind speed on grassland Ea was relatively small.
    
    VL  - 11
    IS  - 6
    ER  - 

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Author Information
  • Pingliang Institute of Soil and Water Conservation, Pingliang, China

  • Pingliang Institute of Soil and Water Conservation, Pingliang, China

  • Pingliang Institute of Soil and Water Conservation, Pingliang, China

  • Pingliang Institute of Soil and Water Conservation, Pingliang, China

  • Pingliang Institute of Soil and Water Conservation, Pingliang, China

  • Pingliang Institute of Soil and Water Conservation, Pingliang, China

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