河套绿洲土地覆盖类型变化特征及驱动因素

刘立平, 刘良旭, 连杰, 卢建男, 王国林

Land cover type change characteristics and driving factors in Hetao oasis

Liping Liu, Liangxu Liu, Jie Lian, Jiannan Lu, Guolin Wang

图6 四旗县人口数量变化曲线

Fig.6 Curve of population change in four areas