| Relationship between water consumption and meteorology\|vegetation parameters in the desert grassland on different time scales |
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| DOI：10.7606/j.issn.1000-7601.2020.04.19 |
| Key Words: water consumption meteorology parameters evapotranspiration vegetation index water vapor exchange desert grassland |
| Author Name | Affiliation | | WANG Jun | Institute of Water Resources for Pastoral Area, China Institute of Water Resources and Hydropower Research, Hohhot, Inner Mongolia 010020, China
Institute of Water Resources for Pastoral Area of the Ministry of Water Resources, Hohhot, Inner Mongolia 010020, China | | ZHANG Ruiqiang | Institute of Water Resources for Pastoral Area, China Institute of Water Resources and Hydropower Research, Hohhot, Inner Mongolia 010020, China
Institute of Water Resources for Pastoral Area of the Ministry of Water Resources, Hohhot, Inner Mongolia 010020, China
Laboratory of Simulation and Regulation of Water Cycle in River, Beijing 100038, China | | LI Heping | Institute of Water Resources for Pastoral Area, China Institute of Water Resources and Hydropower Research, Hohhot, Inner Mongolia 010020, China
Institute of Water Resources for Pastoral Area of the Ministry of Water Resources, Hohhot, Inner Mongolia 010020, China
Laboratory of Simulation and Regulation of Water Cycle in River, Beijing 100038, China | | LU Haiyuan | Institute of Water Resources for Pastoral Area, China Institute of Water Resources and Hydropower Research, Hohhot, Inner Mongolia 010020, China
Institute of Water Resources for Pastoral Area of the Ministry of Water Resources, Hohhot, Inner Mongolia 010020, China | | CAO Xuesong | Institute of Water Resources for Pastoral Area, China Institute of Water Resources and Hydropower Research, Hohhot, Inner Mongolia 010020, China
Institute of Water Resources for Pastoral Area of the Ministry of Water Resources, Hohhot, Inner Mongolia 010020, China | | LIU Ruichun | Office of the Hangjin Banner Flood Prevention and Drought Resistance, Hangjinqi, Inner Mongolia 017400, China |
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| Abstract: |
| Data from a large\|scale weighing lysimeter was used to systematically analyze the relationship between the evapotranspiration and meteorology\|vegetation parameters on different time scales during the Xilamuren desert grassland plant growth season from 2012 to 2018. (1) Wind speed (P<0.01), air temperature (P<0.01), and precipitation (P<0.01) were significantly correlated with the evapotranspiration on the different time scales. (2)Empirical equations for hourly, daily, and monthly time scales were established based on the multivariate regression analysis with coefficients of determination of 0.94 (P< 0.01), 0.42 (P<0.01), and 0.82 (P<0.01)., respectively. The empirical equation accurately simulated the water consumption characteristics of the underlying surface of the Xilamuren desert grassland on the hourly and monthly scales.(3) According to the difference between ET and precipitation from April to October, water vapor exchange during the plant growth season was mainly characterized by water consumption on the land surface from 2012 to 2018. The probability of drought occurred the most in August every year. These results are useful for studying water vapor exchange and monitoring drought in the desert grassland. |
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