#TITLE_ALTERNATIVE#

• Main Author: DENTA HALIM (NIM:15308042), DERSANTI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26507
• Institution: Institut Teknologi Bandung

<p align="justify">The study analyzes the ability of gravel and sand as landfill liner through permeability test in model scale. The method used in this study is the measurement of head loss in falling head and constant head test, and also the measurement of flow rate. Physical model has cylindrical shape with a diameter of 30 cm and a height of 1 meter. Leachate drainage pipe which has 2 inches in diameter, placed transversely in the physical model. The drainage pipe is equipped with a reducer and 1 inch valve on the output. Gravels media that are used in this study have various diameter such as 0.6 cm, 1.5 cm, 2 cm, 3 cm, and 4 cm. Physical model 1 consists of gravel with diameter 3 cm, 1,5 cm, and 0,6 cm and holes on the top of the drainage pipe. Physical model 2 consists of gravel with diameter 1,5 cm and 0,6 cm and holes on the top of the drainage pipe. Physical model 3 consists of gravel with diameter 3 cm, 1,5 cm, and 0,6 cm and holes at the bottom of the drainage pipe. Physical model 4 consists of gravel with diameter 1,5 cm and 0,6 cm and holes at the bottom of the drainage pipe. Physical model 5 consists of gravel with diameter 4 cm, 2 cm, and 0,6 cm and holes on the top of the drainage pipe. Physical model 6 consists of sand, gravel with diameter 3 cm, 1,5 cm, and 0,6 cm and holes on the top of the drainage pipe. The result of the study shows that the largest vertical permeability coefficient (Kv) and horizontal permeability coefficient (Kh) are in physical model 5, which is 0,00065 cm/s and 0,0189 cm/s. The smallest Kv and Kh are in physical model 6, which is 3,19x10-5 cm/s and 0,0033 cm/s. For Bandung rainfall intensity data, model 5 has the longest breakthrough time and model 6 has the fastest breakthrough time. Model 5 has the smallest head which is less than 0.3 m and has the best barrier system. Landfill length is a basic for determining the distance between the leachate collection pipes. Cover soil has an important role to restrict the generation of leachate and control the runoff so that comes out of the landfill.<p align="justify">