Critical Depth of Groundwater Recharge for Vegetation in Semi-Arid Areas

4th International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Wang, Yong^1 ; Chen, Minjian^1 ; Yan, Long^1 ; Hu, Yajie^1 ; Deng, Wei^1 ; Zhou, Fei^2

Institute of Water Resources and Hydropower Research, Beijing

100038, China^1

Development Research Center, Ministry of Water Resources, Beijing

100038, China^2

关键词: Basic principles;    Calculation and applications;    Critical depth;    Ecological water demand;    Ground water recharge;    Semiarid area;    Theoretical calculations;    Vegetation type;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/237/3/032091/pdf
DOI  :  10.1088/1755-1315/237/3/032091

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Semi-arid area refers to the area where the precipitation is between 200∼400mm and the annual mean evaporation is more than 1000mm. Because of insufficient rainfall that could not support the growth of vegetation, groundwater becomes an important replenishment to the ecological water demand of vegetation. Thus, research on the critical depth of groundwater recharge for vegetation in semi-arid areas is critically important to ecology. This paper mainly analyzed the basic principles of groundwater recharge for vegetation in semi-arid areas and deduced the theoretical calculation formula, which was quantitative calculated, of the critical depth of groundwater recharge for vegetation. The study selected Ordos, Xilingol, Hulunbuir and other semi-arid areas and conducted calculation and application. The conclusion was that the critical depth of groundwater recharge for vegetation in Hulunbuir City and Xilinhot City was 1.5∼3.5m, with an insignificant difference, while the critical depth in Ordos was 3∼5m, mainly related to vegetation types and soil types.