4 flood level marks on the cliff faces were observed in upper and lower Jingcun hydrologygauge station in the middle reaches of Jinghe River

Binxian County.Through local interview and consult data

the ages of the 4 flood level marks were determ ined accurately.Then their peak discharges were quantitatively figured out by the hydrology principle of f lood leve-l discharge and slope-area m et hod and t he erro rs were estimated to be 1.42%~ 4.21%and-2.13%~ 3.16%

respectively

compared to the f lood data observed.The result showed that the flood level marks on the cliff faces in river channel could check the flood data observed and the extreme floods could also be figured out by the flood level marks in the drainage basin where was short of the flood data observed.