According to the slope aspects, the runoff coefficient for southern slope is the highest and that for eastern slope is the lowest.

从不同坡向来看，径流系数大小依次为南坡>西坡>北坡>东坡。

Zichang oilfield is located in the eastern slope of Ordos basin.

子长油田位于鄂尔多斯盆地东部斜坡.