The Role of Remotely Sensed Data in Rapid Flood Vulnerability Mapping and Food Security a Case Study of Cross River State, Nige
Olojo Olabamiji Oluwaseun, National Space Research and Development Agency, Obasanjo Space Center, Piyakasa Bustop, Airport Road PMB 437Garki Post Office A
olojolabamiji@gmail.com ,Oladeinde Adepero, National Emergency Management Agency, Plot 439, Adetokunbo Ademola Crescent, Maitama, Abuja, P.M.B 357 Gark
Oyewunmi Ademuyiwa Samsudeen, , National Space Research and Development Agency, Obasanjo Space Center, Piyakasa Bustop, Airport Road PMB 437Garki Pos
ademuyiwa.oyewumi@nasrda.gov.ng, Okorukwu Williams Okey, Office of the Surveyor General of the Federation, Garki Abuja+2348123685391, willy@nignet.net
ABSTRACT
The year 2012 flood in Nigeria is said be the worst
flood to have ever devastated the country in the last
fifty years. The flood was as a result of many
underlying factors and the persistent rain fall which
some have alluded to as a result of the changing global
climate. As a result of the 2012 flood there has been
persistent calls of a looming food crisis and imminent
flood in the year 2013.
INTRODUCTION
Cross river state was one of the states hardest hit because
of its coastal communities by the 2012 flood. The
communities affected were mainly the ones located on the
banks of the cross river which happens to be the main river
passing through the state and in some areas the flood
extended up to two kilometers from the river banks. The
Cross River which takes its source from Mamfe in
Cameroon Republic is fed by many other rivers and
streams as it courses its way through Cross River Central
and Cross River Southern Senatorial Districts down to the Atlantic
DATA AND SOURCES
FORMAT
PATH/ROW
ACQUSITION DATE
SENSOR
RESOL
UTION
BANDS
SOURCE
GEOTIFF
188/187:55
20010127/20001217
TM
28.5
2,3,4
GLCF
GEOTIFF
187/188:56
20001217/20001210
ETM
30
2,3,4
GLCF
GEOTIFF
187/188:57
20001210/19991129
ETM
30
2.3,4
GLCF
2009/2010
NIGERIAS
AT-1
32
G,R,IR
NCRS
RASTER
FORMAT
RASTER
RASTER
VECTOR
TYPE
NIGERIA AGRICULTURE MAP
2012 FLOOD EXTENT
GPS COORDINATE OF FLOOD AFFECTED
COMMUNITIES
SOURCE
MINISTRY OF AGRICULTURE NIGERIA
NASA (MODIS)
NASRDA,OSGOF,NEMA
RASTER/JPEG
SUBMERGED ISLAND (UMON,CROSS RIVER
STATE)
GOOGLE EARTH 2013,
METHODOLOGY
Satellite Imagery
.
Ground Truth
Google Earth Image/Landsat/ NigeriaSat-1
Srtm Data
Ocean.
OBJECTIVES
To investigate types of land use affected by the Flood
To carry out a rapid assessment mapping of flooded areas
To develop a flood risk assessment map
To determine areas suitable for relocation of affected
settlement
Geo-referencing
LULC Map
Sub-set
Image processing/Supervised Classification
Supervised Classification
Reclass and
Combine
Flood Maps
STUDY AREA
Compute areas
Cross river is on 5°45′N, 8°30′E
and has a landmass of 23,074
sqkm, with a population of
The tot
140 sq
such as
were d
river w
neighb
Ebonyi
rains .
the tai
the No
Maps, Tables
NASA generated flood
extent
The Ni
acquire
out a
coastal
opportu
GIS Overlay
DISCUSSIONS AND FURTHER RESEARCH
Intern
Draft