抄録
Road gutters formed using crushed stones, scallop shells and other high-drainage materials (known as permeable gutters) were installed in a section where highly permeable ground was distributed to allow surface water to infiltrate the ground through the gutters themselves. Since permeable gutters can maintain natural and sound water circulation to a higher degree than artificial concrete troughs as well as removing the risk of small animals falling in, they are considered to represent environmentally friendly drainage systems. They can also reduce construction costs since the flow rate is lower and the drainage section is smaller than systems that channel water through concrete troughs.
