[Objective] We aimed to investigate the characteristics of soil erosion in extreme rainfall events to explore the problems related to soil erosion control

and provide the scientific basis for human beings to cope with extreme weather disasters.[Methods] Linqu County

Shandong Province

which was greatly affected by Typhoon Lekima on August 9

2019

was chosen as the investigation area. By means of data analysis and field investigation

the slope erosion and road erosion characteristics of typical small watersheds in Zengjiagou and Gengjiagou were analyzed

as well as the scouring and silting of various river courses in the upper reaches of the Mihe River.[Results] During the crossing of Typhoon Lekima

the rainfall at the center of the rainstorm reached the 50-year recurrence interval. There was no rill erosion in the forest

grassland and abandoned farmlands

but this did occur in the sloped farmland. The erosion modulus was 4 560~19 500 t/km2

and the rills on the terraced fields were concentrated in the position where the catchment above was carried out; the ridges of terraced fields protected by vegetation or stone ridges were intact

while the other types of ridges showed serious collapse. The landslide erosion modulus of the surveyed land was 301~36 321 t/km2

and the collapse of ridges was the most serious. The riverbanks

especially at the top of the bend

were severely scoured

and the sediment amount was larger in the river return area

the junction of the two rivers

the barrage

and upstream of the bridge.[Conclusion] Soil and water conservation measures in small watersheds can reduce the soil erosion caused by rainstorms. It is suggested to design and construct suitable water storage and drainage

as well as soil conservation measures for different areas and used land. It may also be helpful to strengthen farmers' agronomic training of soil and water conservation

which could have positive effects on preventing soil erosion disasters caused by heavy rain.