... sun dries up the water,people can get salt from the ground ? 当太阳把水干涸,人们可以从地面盐 Direct Runoff ? 直接径流 please fix it into a one page printing formatting. ? 请到一页打印格式修复它。
A direct calculation method of the critical shear stresses was established through observing initial place of slope erosion arising and the characteristic of runoff.