基于土壤墒情监测的灌溉水有效利用系数测算方法研究

Calculation method of effective utilization coefficient of irrigation water based on soil moisture monitoring

我国农业用水占总用水量的一半以上,掌握灌区土壤墒情变化规律、采用有效的灌溉水利用系数测定方法,对于保障粮食安全、推动农业节水具有重要现实意义。本文针对山西省尊村灌区2019年土壤墒情进行监测,分析不同作物土壤墒情变化规律,基于土壤墒情监测成果进行灌溉水利用系数测算方法研究,结果表明尊村灌区一干八斗渠样点灌区灌溉水利用系数为0.761。该测算方法可以有效测算尊村灌区样点灌区灌溉水利用系数,为灌溉水有效利用系数的测定提供了一定借鉴。

Agricultural water consumption accounts for more than half of the total water consumption in China.It is of great practical significance for ensuring food security and promoting agricultural water saving to master the variation law of soil moisture in irrigation areas and adopt effective measurement methods of irrigation water utilization coefficient.The soil moisture of Zuncun Irrigation District in Shanxi Province in 2019 was monitored,and the variation law of soil moisture of different crops was analyzed.Based on the monitoring results of soil moisture,the calculation method of irrigation water utilization coefficient is studied.The results show that the irrigation water utilization coefficient of Zuncun irrigation area is 0.761.This calculation method can effectively measure the irrigation water utilization coefficient of the sample irrigation area in Zuncun Irrigation District,which provides a reference for the determination of the effective utilization coefficient of irrigation water.