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A system has been developed that uses remote sensing data for the determination of the quantity of surface water stored in a network of ditches. The method combines Landsat Thematic Mapper (TM) images with ditch positions obtained from maps in order it derive 'Ditch Indices' and measures features that are much smaller than a pixel (typically 10% of the area). The results of the analysis are promising. The presence of the sub-pixel size ditches was clearly detected within the image and in fact the signal obtained from them was used in a feedback loop to improve the accuracy of the geo-referencing. The monospectral 'Ditch Indices' correlated strongly with each other. The possibility of using archives of images to measure surface water storage could lead to a significant advance in our ability to produce accurate hydrological predictions.

Additional information

Authors: SHEPHERD I M, JRC Ispra (IT);AL-KHUDHAIRY D, JRC Ispra (IT);THOMPSON J R, University College London, Department of Geography (GB)
Bibliographic Reference: Paper presented: EWRA Conference on Operational Water Management, Copenhagen (DK), September 3-6, 1997
Availability: Available from (1) as Paper EN 40732 ORA
Record Number: 199710915 / Last updated on: 1997-07-23
Original language: en
Available languages: en
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