A landslide is a significant environmental hazard that results in an enormous loss of lives and properties. Studies have revealed that rainfall, soil characteristics, and human errors, such as deforestation, are the leading causes of landslides, reducing soil water infiltration and increasing the water runoff of a slope. This paper introduces vegetation establishment as a low-cost, practical measure for slope reinforcement through the ground cover and the root of the vegetation. This study reveals the level of complexity of the terrain with regards to the evaluation of high and low stability areas and has produced a landslide susceptibility map. For this purpose, 12 conditioning factors, namely slope, aspect, elevation, curvature, hill shade, stream power index (SPI), topographic wetness index (TWI), terrain roughness index (TRI), distances to roads, distance to lakes, distance to trees, and build-up, were used through the analytic hierarchy process (AHP) model to produce landslide susceptibility map. Receiver operating characteristics (ROC) was used for validation of the results. The area under the curve (AUC) values obtained from the ROC method for the AHP model was 0.865. Four seed samples, namely ryegrass, rye corn, signal grass, and couch, were hydroseeded to determine the vegetation root and ground cover’s effectiveness on stabilization and reinforcement on a high-risk susceptible 65° slope between August and December 2020. The observed monthly vegetation root of couch grass gave the most acceptable result. With a spreading and creeping vegetation ground cover characteristic, ryegrass showed the most acceptable monthly result for vegetation ground cover effectiveness. The findings suggest that the selection of couch species over other species is justified based on landslide control benefits.

中文翻译：

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水培植被对边坡加固的效果评价

山体滑坡是一种重大的环境危害，会导致巨大的生命和财产损失。研究表明，降雨、土壤特性和人为错误（如森林砍伐）是造成山体滑坡、减少土壤水分渗透和增加斜坡水径流的主要原因。本文介绍了植被建设是一种低成本、实用的边坡加固措施，通过地被覆物和植被根部进行加固。这项研究揭示了评估高稳定性和低稳定性区域的地形复杂程度，并制作了滑坡敏感性图。为此，有 12 个条件因子，即坡度、坡向、高程、曲率、山体阴影、河流功率指数 (SPI)、地形湿度指数 (TWI)、地形粗糙度指数 (TRI)、通过层次分析法 (AHP) 模型使用到道路的距离、到湖泊的距离、到树木的距离和堆积物来生成滑坡敏感性图。接受者操作特征 (ROC) 用于验证结果。从 AHP 模型的 ROC 方法获得的曲线下面积 (AUC) 值为 0.865。2020 年 8 月至 12 月期间，对 4 个种子样品，即黑麦草、黑麦玉米、信号草和沙发进行了水播，以确定植被根系和地被植物在高风险易感 65°斜坡上的稳定和加固效果。 观察到的每月植被沙发草根给出了最可接受的结果。黑麦草具有蔓延和匍匐的植被地面覆盖特征，显示出最可接受的月度植被地面覆盖效果结果。