气候变化背景下华北平原灌溉需水及农业干旱易发区变化研究

Study on irrigation water demand and variation of agricultural drought-prone areas in North China Plain under background of climate change

以华北平原为研究区,选取冬小麦和夏玉米作为典型作物,采用作物系数法并依据预估的气候情景计算典型作物的净灌溉需水量,分析不同气温和降水变化幅度下冬小麦和夏玉米需水过程和需水总量。同时,结合气象干旱和需水异常程度划分了干旱易发区。所得成果可供相关研究人员参考。

By taking the North China Plain as the study region,the winter wheat and the summer maize are selected as the typical crops for calculating the net irrigation water demand with the crop coefficient approach on the basis of the pre-estimated climate scenario,and then the water demand process and the total water demand of both the winter wheat and the summer maize under different temperatures and precipitation changing amplitudes are analyzed.Meanwhile,the drought-prone areas are regionalized in accordance with the abnormal degrees of the meteorological drought and the water demand.The study result can provide reference for the researchers concerned.