Method and apparatus for determining runoff using remote geograp

Details Method and apparatus for determining runoff using remote geograp Method and apparatus for determining runoff using remote geograp

1991-03-05

1994-06-21

Envall, Jr., Roy N.

Boots, shoes, and leggings

G01V 100

Patent

active

053233174

ABSTRACT:
Images of a selected geographic region are obtained using remote sensing apparatus and are processed to determine characteristic spectral reflectance patterns associated with different ground covers and soil types in the region. The image processing means compares the spectral reflectance patterns to image pixel values in order to classify each pixel in a ground cover or soil type class, the corresponding spectral reflectance pattern for which matches the pixel value. In a preferred embodiment of the invention, Geographic Information System (GIS) software is utilized to combine a remotely sensed image providing ground cover classifications for a geographic region with a remotely sensed image providing soil type classifications for the same region in order to generate a rainfall loss function. The rainfall loss function can then be used to determine a runoff curve number (RCN) for the region, to determine probable maximum flood (PMF), or to generate various design flood hydrographs corresponding to different precipitation events using a computer water shed model.

REFERENCES:
patent: 3598980 (1971-08-01), Lawrence et al.
patent: 4227211 (1980-10-01), Disbrow
patent: 4908763 (1990-03-01), Sundberg
Water Resources Bulletin, American Water Resources Association, Dec., 1986, Draper et al., vol. 26 No. 6.
IEE Transactions on Geoscience and Remote Sensing, vol. GE-22, No. 6, Nov. 1984.
Water Resources Bulletin, American Water Resources Association, Feb. 1990, vol. 1, Rango et al.
P. A. DeBarry et al., "Computer Watersheds", Civil Engineering, vol. 60, No. 7, pp. 67-70 (Jul. 1990).
W. Skipwith et al., "Closing the Floodgates", Civil Engineering, vol. 60, No. 7, pp. 54, 55 (Jul. 1990).

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