Lawrence W. Martz

TL;DR: The primary purpose of the algorithms and computer program is to parameterize rapidly drainage network and subcatchment properties from widely available DEMs for subsequent use in hydrologic surface runoff models, watershed discretizations, or statistical and topological evaluation of drainage networks.

TL;DR: In this paper, the authors proposed a new approach that improves upon current methods of flat surface treatment, based on the recognition that in natural landscapes drainage is generally away from higher and towards lower terrain, to produce a drainage pattern over the flat surface that is topographically consistent and exhibits flow convergence properties.

TL;DR: In this paper, two new algorithms are introduced that are based on more reasonable assumptions about the nature of flat areas and depressions, and produce more realistic results in application, allowing breaching of depression outlets and considering the distribution of both higher and lower elevations in assigning flow directions on flat areas.

TL;DR: In this paper, a computer program is presented to determine catchment area at every point represented by an element in the elevation matrix under the assumption that water flow over the surface will terminate in depressions.

TL;DR: In this article, a constrained breaching algorithm is proposed to reduce the number and size of closed depressions in a raster DEM, which can be applied in conjunction with conventional depression filling to provide a more realistic treatment of those depressions that are likely due to overestimation errors.