VSMB模型在甘肃典型引黄灌区的适用性研究

Study on Soil Moisture Simulation in Typical Irrigation Areas of the Yellow River Basin in Gansu Province

甘肃省黄河流域的农业灌溉用水在甘肃省黄河流域乃至全省都占有较大比重,农业灌溉的耗水机理与水平衡关系,往往只是根据经验做粗略的估计,准确性低,造成用水效率不高、水资源浪费等一系列问题。为弄清农田水分各分项消耗量,通过VSMB模型对景电灌区、洮惠渠灌区以及泾河南干渠灌区的不同作物进行农田土壤水分模拟,模拟结果显示:模型对3个灌区均有很好的适应性,对各水分消耗分量模拟精度较高,为甘肃省引黄灌区耗水系数分析、定量计算提供了有效的方法。

Agricultural irrigation water use in the Yellow River basin of Gansu Province occupies a large proportion in the Yellow River basin of Gansu Province and even in the whole province. The water consumption mechanism of agricultural irrigation and water balance relationship often make rough estimates based on experience and the accuracy is low, resulting in a series of problems such as inefficiency of water use and waste of water resources. In order to clarify the consumption of each item of farmland moisture, the paper used the VSMB model to simu late the soil moisture of different crops in Jingdian irrigation area, Taohuiqu irrigation area and Jinghe Main Canal irrigation area. The simula tion results show that the model has a good adaptability to the three irrigation areas. The model has high simulation accuracy for each water consumption component and can be used for irrigation of the Yellow River basin in Gansu Province. The analysis and quantitative calculation of regional water consumption coefficient provide an effective method.