Application of Biochar Material in Erosion Protection and Slope Stability

Abstract

Erosion is an important issue that reduces slope stability and causes failure. During the rainy season, soil erosion especially near slope toe are likely to result in slope failure. The study aims to evaluate the use of biochar from corn cobs to improve soil erodibility. A soil erosion test was conducted using the Submerged Jet Test (JET) and the 1D seepage behavior was studied using a vertical soil column on soil collected in the study area of the highway area. 1192, Tha Phra Subdistrict, Mae Cham District. Chiang Mai, based on the capillary barrier system (CBS) theory. The results, however, show that by adding more biochar without curing time, the erodibility of the soil was increased. Therefore, in order to use biochar to promote plant growth in the capillary barrier system, some containers like geocell should be used to contain the soil-biochar mix to increase stability. However, a critical rainfall was found that can cause the water to penetrate the barrier.