一、引言伊犁盆地是中国天山西段的一个大型山间盆地,北有别珍套山、科古琴山、博罗克努山,走向北西西;南面为哈尔克山、那拉提山等,走向南西西,南北山地相汇在盆地东端,形成一个向西开口的三角形盆地。由于伊犁盆地的有利地形,拦截了西风气流的水 I. INTRODUCTION The Ili basin is a large mountain basin in the western segment of the Tianshan Mountains in China. There are Biezhenhuashan, Kogaqin and Boluookunshan in the north, and the northwest and west; the Halker Mountains and Nalatianshan in the south , To the South West, North and South Mountain meet in the eastern end of the basin, forming a triangular basin opening to the west. Due to the favorable topography of the Ili Basin, water from the westerlies was intercepted