Hedgerow is effective in soil and water conservation

and the distance between hedgerows is the key parameter for their allocation. At present

the equidistance is often designed in the most hedgerow arrangements

but the effect of equidistant hedgerows at different slope sections is not clear. Equidistant hedgerows at different slope sections in the northeast black soil region were selected as the object. A runoff erosion experiment with sediment was carried out to simulate the runoff sediment yield process of hedgerows with equal spacing in different slope segments under the condition of 5° slope

100 mm/h rain intensity. The results showed that:Compared with the control of bare land

hedgerows in all slope segments could prevent slope runoff

and the lag time was shortened gradually with the downward slope segments. The runoff and sediment yield of hedgerows in different slope sections were basically consistent on time scales. The upper and middle slopes were relatively stable

and the lower slopes showed obvious fluctuation at the later stage. The changing trend was closely related to the erosion morphology in the slope

and the overall trend was smaller than that of the control. Hedgerows in the different slope sections reduced the runoff by 5.40%~10.16%

and reduced sediment by 51.90%~75.72%. Although it had a positive effect on runoff and sediment reduction

the erosion module in the lower slope reached 259.96 t/km2

exceeding the soil loss tolerance of the northeast black soil area. It could be concluded that the equidistant hedgerow should be improved for its application in the northeast black soil area. This study could provide an important scientific basis for the hedgerow design in the northeast black soil area.