A MORPHOLOGICAL ASSESSMENT OF SOIL MICROTOPOGRAPHY USING A DIGITAL ELEVATION MODEL ON ONE SQUARE METER PLOTS

被引：13

作者：

BRUNEAU, P

GASCUELODOUX, C

机构：

[1] Institut National, la Recherche Agronomique Laboratoire de science du sol, 35042 Rennes Cedex

来源：

CATENA | 1990年 / 17卷 / 4-5期

关键词：

D O I：

10.1016/0341-8162(90)90034-B

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Depression storage restrains overland flow and erosion. A technique for delimiting areas of depression storage from Digital Elevation Models (D.E.M.s) is described. Local and simple geomorphological features are defined, based upon the comparison of the elevation of each point with each of its neighbours. These features are mapped and the morphology of depression storage, connections and flow lines between the depressions are then accurately identified. The method is illustrated with an example from a field in which maize had just been harvested. D.E.M.s. in the form of altitude matrices were established by photogrammetry for plots of about 1 m2 at 1 cm spacing on square grids. The analysis of the D.E.M.s identified and delimited small storage depressions, some of which were isolated and others interconnected, in the middle of the spaces between the rows of the crop. © 1990.

引用

页码：315 / 325

页数：11

共 14 条

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