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| DOI：10.13522/j.cnki.ggps.20180016 |
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| Dynamic of Groundwater Table in Baoshan Farm |
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JIA Yanhui, WU Yugang, ZHU Wenjiang, MA Chunya, LI Jinshan, YIA Huanqing
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1.Key Laboratory of Water-Saving Agriculture, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; 2.Baoshan Farm, Jiamusi 154000, China; 3. Huojia Management Office of Henan People’s Victory Canal Administration， Huojia 453800， China
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| Abstract: |
| 【Objective】 The change in groundwater table affects many ecohydrological processes and this paper analyzed the dynamics of the depth of groundwater table at Baoshan farm in Heilongjiang Province.【Method】The seasonal variability of groundwater table was analyzed based on the measured data from 1997 to2007 at Baoshan farm. The annual variation of the groundwater table was analyzed by the two-way regression combined with the standardized precipitation index (SPI), and the possible trend in the change of groundwater table was analyzed using rescaled range analysis (R/S). 【Result】 Groundwater table dropped 0 to 2 m during the growing season of rice due to extraction for groundwater irrigation, and it then rebounded to normal level in the following fallow period before planting the rice again. A precipitation of 80 cm during the rice growth season could lead to the groundwater table rising by 1.0 m. Temporally, annual average groundwater table showed a steady rise or dropping. There was a strong linear relationship between the groundwater table and SPI with R2=0.680 4. Using the groundwater for irrigation did not cause a continuous groundwater table dropping. 【Conclusion】 Precipitation and irrigation are the major factors influencing the dynamics of the groundwater table at Baoshan farm. Keeping extraction and recharge of the groundwater resources at a reasonable ratio at Baoshan farm is the key to prevent waterlogging and the secondary soil salinity. |
| Key words: Baoshan farm; groundwater; dynamic analysis |
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