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GC13I-0860: An Assessment of Surface Water Detection Methods for the Tahoua Region, Niger
NTRS Full-Text: Click to View  [PDF Size: 48.1 MB]
Author and Affiliation:
Herndon, Kelsey E.(Alabama Univ., Huntsville, AL, United States)
Muench, Rebekke(Alabama Univ., Huntsville, AL, United States)
Cherrington, Emil(Alabama Univ., Huntsville, AL, United States)
Griffin, Robert(Alabama Univ., Huntsville, AL, United States)
Abstract: The recent release of several global surface water datasets derived from remotely sensed data has allowed for unprecedented analysis of the earth's hydrologic processes at a global scale. However, some of these datasets fail to identify important sources of surface water, especially small ponds, in the Sahel, an arid region of Africa that forms a border zone between the Sahara Desert to the north, and the savannah to the south. These ponds may seem insignificant in the context of wider, global-scale hydrologic processes, but smaller sources of water are important for local and regional hydrologic assessments. Particularly, these smaller water bodies are significant sources of hydration and irrigation for nomadic pastoralists and smallholder farmers throughout the Sahel. For this study, several methods of identifying surface water from Landsat 8 OLI, Sentinel 1 SAR, Sentinel 2 MSI, and Planet Dove data were compared to determine the most effective means of delineating these features in the Tahoua Region of Niger. The Automated Water Extraction Index (AWEInsh) had the best performance when validated against very high resolution Digital Globe imagery, with an overall accuracy of 98.6%. This study reiterates the importance of region-specific algorithms and suggests that the AWEInsh method may be the best for delineating surface water in the Sahelian ecozone, likely due to the nature of the exposed geology and lack of dense green vegetation.
Publication Date: Dec 11, 2017
Document ID:
20170012198
(Acquired Dec 19, 2017)
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Report/Patent Number: MSFC-E-DAA-TN50353
Document Type: Oral/Visual Presentation
Meeting Information: American Geophysical Union (AGU) 2017 Fall Meeting; 11-15 Dec. 2017; New Orleans, LA; United States
Meeting Sponsor: American Geophysical Union; Washington, DC, United States
Contract/Grant/Task Num: NNM11AA01A
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Public use permitted
NASA Terms: SURFACE WATER; LANDSAT SATELLITES; REMOTE SENSING; MOISTURE CONTENT; WIND (METEOROLOGY); SATELLITE OBSERVATION; LANDSAT 1; NIGER; HYDRATION; IRRIGATION
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Last Modified: December 19, 2017
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