[1]YANG Lihu,XU Yingchun,MA Yuxue,et al.Water Movement in the Unsaturated Zone and Groundwater Recharge in the Yellow River Irrigation Area[J].Research of Soil and Water Conservation,2021,28(06):168-174.
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Water Movement in the Unsaturated Zone and Groundwater Recharge in the Yellow River Irrigation Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 06
Page number:
168-174
Column:
Public date:
2021-10-10
- Title:
- Water Movement in the Unsaturated Zone and Groundwater Recharge in the Yellow River Irrigation Area
- Keywords:
- unsaturated zone; water movement; groundwater recharge; Yellow River Irrigation Area; Yinchuan Plain
- CLC:
- S152.7
- DOI:
- -
- Abstract:
- In order to reveal the mechanism of water movement and groundwater recharge and provide theoretical basis for agricultural water resources management in arid area，Yongning experimental irrigation site in the Yinchuan Plain was taken as an example to monitor precipitation，soil water content，soil water potential and groundwater level. The zero flux plane method was used to calculate the water balance of the unsaturated zone. The relationship between soil water and groundwater recharge was evaluated. The results show that:(1)the soil moisture content and soil water potential in the active and sub-active layers extremely varied and were most obviously affected by rainfall/irrigation infiltration and evaporation; affected by the leakage of the irrigation canal system，the minimum groundwater depth was recorded in early July，and the maximum groundwater depth was observed in late April and early November;(2)the increase of soil water content in the active and sub-active layer，the initial infiltration rate，duration time and total leakage irrigation mode were all higher in the irrigation mode than those in the rainfall mode，however，this trend was the opposite of soil evaporation; While the groundwater level rose and the amount of irrigation infiltration decreased，the deep leakage increased relatively; the duration of the deep layer leaking also increased compared with that while the groundwater level was lower;(3)during the study period，soil water storage increased by 0.3 mm，soil infiltration was 633.3 mm，evaporation was 285.6 mm，deep leakage was 434.4 mm，the recharge from groundwater was 347.4 mm. In general，the movement of soil moisture in the aerated zone was affected by continuous rainfall mode，irrigation mode and groundwater level fluctuations. The amount of groundwater recharge accounted for 68% of the total infiltration from precipitation or irrigation. It is necessary to optimize the irrigation mode and improve irrigation efficiency and water use efficiency.
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Last Update:
2021-10-10