| Cite this article: | 樊丽琴,吴霞,李磊.平罗县不同地下水位分布区地下水埋深变化特征分析[J].灌溉排水学报,0,():-. |
| FAN Li-qin,Wu Xia,Li Lei.平罗县不同地下水位分布区地下水埋深变化特征分析[J].灌溉排水学报,0,():-. |
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| Characteristics Analyse of Groundwater Depth in the Areas with Different Groundwater Level of Pingluo County |
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FAN Li-qin, Wu Xia, Li Lei
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Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry Sciences
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| Abstract: |
| 【Background】In arid and semi-arid areas, soil salinity is closely related to groundwater depth.【Objective】Characteristics of groundwater depth in the Areas with Different Groundwater Level of Pingluo County is discussed in order to give better guidance to us in rational irrigation water use and controlling soil salinization.【Method】Based on the dynamic observing data of groundwater depth from 9 observation points in the areas with different groundwater level of Pingluo County during 2007—2017, their variation characteristics and influencing factors were analysized.【Result】The variations of groundwater depth in Pingluo County between years were greater than those of the interannual, which changed with months as type "W", changed with vintage as a flat wave type. In May-August and November to January of the following year, groundwater depth curves of 9 observation points showed state of aggregation, which showed a discrete state in other months. The inter-annual variation coefficients of groundwater depth in the areas with different groundwater level were showed as follows: high groundwater level > middle groundwater level > low groundwater level, but there was no obvious rule in the year. Compared with the groundwater depth in the areas with middle and low groundwater level, the groundwater depth in the areas with high groundwater level was more unstable. According to the correlation between average annual groundwater depth at each observation well and the rainfall amount, average temperature, crop sown area, Water diversion from Yellow River and groundwater withdrawal amount, the groundwater depth changes in the Areas with high and middle groundwater Level of Pingluo County were more affected by Huinong Canal diversion amount from Yellow River. The increase of crop planting area and rice planting area had positive impact on the decrease of groundwater depth.【Conclusion】It is suggested that we should start from reducing the irrigation amount from Yellow River to improve saline-alkali land with high groundwater level of Pingluo County. |
| Key words: Pingluo County; Groundwater depth in the areas with different groundwater level; Variation characteristics; Influencing factors；Water diversion from Yellow River |
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