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Simulation of Groundwater and Heat Transport and Study on Suitable Water Storage Irrigation System in Minqin Oasis Under Different Irrigation Conditions in Winter
DINGLin, LIUWenguang, WUJie
Journal of Agriculture ›› 2026, Vol. 16 ›› Issue (8) : 86-93.
PDF(1004 KB)
PDF(1004 KB)
Simulation of Groundwater and Heat Transport and Study on Suitable Water Storage Irrigation System in Minqin Oasis Under Different Irrigation Conditions in Winter
Water storage irrigation is a method used in northern regions to store water during the off-season of farmland for the needs of crop planting and seedling growth in the following year. Precisely understanding the temporal and spatial changes of soil water and heat after water storage irrigation, and formulating appropriate water storage irrigation systems and soil moisture regulation measures such as cultivation and covering during the off-season for different planting patterns, is particularly important to enhance the water retention capacity of farmland and improve the water utilization efficiency of water storage irrigation. This paper sets different irrigation schemes and uses the HYDRUS-2D model to numerically simulate the changes in water and heat during water storage irrigation. It calculates the water utilization efficiency of different schemes and, based on the simulation results, recommends appropriate winter and spring water storage irrigation systems suitable for the local area. The results show that after delaying the winter irrigation time, water infiltration is slower, and soil moisture is mainly concentrated in the 0-30 cm soil layer. Winter water storage irrigation leads to a decrease in soil temperature, earlier soil freezing time, and deeper freezing depth, effectively reducing the evaporation loss of soil moisture. The earlier the water storage irrigation is carried out, the smaller the quota, and the ground temperature recovers faster, which is beneficial for crop sowing. The water storage irrigation quotas for winter and spring should not exceed 150 mm and 120 mm, respectively. The winter irrigation quota should be 120 mm, and the spring irrigation quota should be 90-120 mm.
storage irrigation / water and heat transport / irrigation system / HYDRUS-2D model / Minqin oasis
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