Depth lines (tight)

The depth lines represent the potential runoff paths of surface water. They form the local erosion base to which all transport processes of soil and water refer. The opposite of the depth lines are the so-called culmination lines, which represent the apex lines of elevations.深度线代表地表水的潜在径流路径，其构成了所有水土运移过程所依托的局部侵蚀基准面。与深度线相对的是所谓的脊线（culmination lines），该线代表高程的顶点连线。