Transcript ppt

Yellow River Delta Morphology Over Time:
A Remote Sensing Spatial Study Utilizing MODIS
James Lee Waclawczyk
Department of Earth and Environmental Science, Graduate Studies
University of Texas at San Antonio
6900 N. Loop 1604 W., San Antonio, Texas 78249-0663
1 December 2004
Agenda
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Study Objectives
 Yellow River
Characteristics
 Study Site
 Methodology
 Image Interpretation
 Image Comparisons
 Data Evaluation
 Results
 Continuing Research
Study Objective
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Evaluate and interpret
spatial patterns of the
Yellow River Delta
Satellite: Terra EOS AM
Sensor System: MODIS
Image Processing:
MODIS Tools
Image Analysis: ENVI
Data Sets
 2000
 2004
Yellow River Characteristics
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Huang River
 Flows from the
Tibetan Plateau
(Qinghai-Xizang) to
the Bohai (Bo) Sea, a
total 5,464 kilometers
 Drainage basin
comprises
approximately 745
thousand square
kilometers or 287
thousand square miles
Yellow River Characteristics (Continued)
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China’s Sorrow
The Ungovernable
Collects heavy sediment
load, primarily silt, from the
immense Loess Plateau,
located in north-central
China
1940-1980: 1 Billion Tons
Annually
1990’s: 500 Million Tons
Annually
2004: < 500 Million Tons
Annually
Study Site
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Yellow River Mouth
and Associate Delta
Coordinates
 37” 35’ to 38” 12”
NL
 118” 33’ to 119” 20’
EL
Determine Delta Size
Methodology
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Image Procurement: EOS Gateway
Processing: MODIS Tools
Image Analysis: ENVI
Historical Data Set: 2000 & 2004
Band Selection: Infa-Red (0.8585 µm)
Region of Interest Tool (Polygon)
Observations Land Erosion and Creation
Linear Statistical Analysis
Image Interpretation
Image Interpretation (Continued)
Image Interpretation (Continued)
Image Comparisons
Day 065
 Blue – 2000
 Green – 2004
Image Comparisons (Continued)
Day 289
 Red – 2000
 Yellow – 2004
Data Evaluation
Yellow River Delta
Square Kilometers
R2 = 0.9443
2198
2196
2194
2192
2190
2188
2186
2184
2182
2180
12/6/1999
4/19/2001
9/1/2002
Date
1/14/2004
5/28/2005
Continuing Research
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Increase Resolution
Increase Sample Size
Tidal Influence
Considerations
River Discharge
Considerations
Thematic Mapping
Questions