In order to realize the ecological restoration of sandy river course in Beijing section of Yongding River

through the field runoff plot drainage and scour test

the effects of different ecological riverbank protection measures on hydrodynamic characteristics

runoff and sediment yield during slope erosion process were studied. In the test

five kinds of bank protection materials (ecological bag

coir blanket

3D-geomat

pine pile and pebble) were used

and the runoff and sediment yield of each treatment were analyzed under three kinds of water discharge flow rate (0.5

1.0 and 1.5 m3/ h) and 10° slope. The results showed that: (1) Under the three release flows

the average runoff velocities of the five bank protection materials were all smaller than that of the bare slope

and the average runoff velocity of the five ecological bank protection materials followed the order of pebble > pine pile > 3D-geomat > ecological bag > coir blanket. The Froude numbers of the five ecological bank protection materials were all less than 1

and the Reynolds numbers were all less than 500. (2) Ecological riverbank protection measures could effectively intercept runoff and slow down the runoff production process

and the runoff production showed a significant logarithmic increase trend with time. The average runoff interception rate of the five ecological bank protection materials followed the order of ecological bag > coir blanket > 3D-geomat > pebble > pine pile. (3) The average sand production rate on the slope surface increased with the increasing of water discharge flow

and the ecological bank protection measures could effectively intercept the slope sand production

and the sediment interception effect of ecological bank protection material gradually decreased with the increasing of the water discharge flow. The research results were of great significance for the bank slope management of different sections of the Yongding River

the selection of ecological bank protection materials

and the construction of the green corridor of the Yongding River

and also provided a reference for the quantitative evaluation of the water and sediment reduction benefits of different bank protection materials.