5mm pehd sheet for Marine land reclamation-HDPE sheets 4×8 Mud island Mud land reclamation Figure 1.1 Mud land reclamation and mud island The outer protection (enclosure dike/dam) of the land reclamation can be made of: • steep-sloped sand body protected by stones (0.2 to 0.3 m); • mild-sloped sand body with a beach (slope of 1 to 25 for 0