Field: | ## Circularity |

Description: | Circularity describes the deviation of the catchment area from a circular shape. It is estimated by dividing the surface area of the catchment, A, by the surface area of a circle with the same perimeter as the length of the contour line, L, defining the catchment area: c=4 x Pi x A / L^{2} |

Please contact Stephan Henne in case of any questions.