Landslides in southern Peru are primarily caused by water saturation due to precipitation. Detailed geotechnical studies have identified parameters of soil layers, such as peat bog, gravel with fine sand, colluvial deposits, weathered slate, and fractured bedrock. These elements generate seepage and compromise slope stability. This research proposes the installation of horizontal drains along the slope to capture the seepage flow, using Slide 6.0 software and finite difference modeling technique. Different scenarios, both static and seismic, were conducted to evaluate the factor of safety. The results revealed that without drain installation, the factor of safety was 1.34 in the static scenario and 0.95 in the seismic scenario. However, by implementing the drains, stability significantly improved, with a factor of safety of 1.512 in the static scenario and 1.209 in the seismic scenario. ...

The purpose of this research project is to develop a hydrogeological model using FEFLOW software, aiming to obtain seepage rates in the 03 soil layers due to rainfall recharge in the Ccoyahuacho slope, and subsequently install drains. Through soil mechanics studies, results of poorly graded gravel, well-graded gravels were obtained, and with the geological study, Andesite rock was identified. Furthermore, the hydrological study yielded an intensity of 227.33 mm/h for a 15-minute duration and a 100-year return period. Additionally, a topographic survey was conducted using the Phantom 4 RTK drone, obtaining 149,354 UTM 18S topographic points. The application of the hydrogeological model resulted in a seepage rate of 0.0002 l/s without drain installation. With the subdrain installed, a seepage rate of 878.1 l/s was achieved, indicating that the flow is directed towards the drainage system. ...