In the Loess Plateau with broken topograhpy and steep earth's surface

the rain redistribution always takes place on hillslopes. Based on field studies

some conclusions have been drawn by us:1

The relationship between received precipitation on slope and steep degree is expressed by equation P

=Pcosasins [f(1)〕2

The critical value of the unredistribution of precipitation on hillslope is enumerated:7°-7mm

15°-4.3mm

27.5°-3.2mm

30°-2.8mm;3

Change law of soil-moisture storage from hilltop to the slope base= In the dry season

the most soil-moisture storage is situated in the central section of hillslopej after the rain season the soil-moisture storage is increasing little by little down the slope.