Session‑6MegadeltasLandformChangesandC
oastalHazardsAssessment(APN/IGCP475Specialsesion,closed
Evaluationo
fsedimentationi
nthenavigationalchannelo
fDamiettap
ort,Egypt

palynostr
atigraphyofasedimentp
rofilecollected
fromChandrapurv
illage,ChilkaLake,Orissahasexhibited thesigni
ficance of mangroves in
AbdAllaM.ABDALLA
unfolding the fluctuations of sea level,
PhysicalOceanography,
OceanographyD
epartment,
transgressive and regressive facies andFacultyofS
cience,Universityo
fA
lexandria,depositionalenvironments.
Ale
xandria,
Egypt
I
nor
dertotranslatet
hesignificantb
io‑
and‑
E‑
mail:drabd7
7@yahoo.comclimati
c events of last two millennia sixbiostratlgraphicalu
nitsa
spollen zones (CH‑1The Por
t ofDamietta is connected with deep CH‑6)hasbeeni
dent
i
fie
dfromthr
eemetredeep
wateroffshore by means ofadredged channel sedimentp
rofile.PollenzoneCH‑Iexhibite
dthewhichcreatesgreaterthannormaldept
hswitht
he marine environmentwhereas pollen zone CH‑2resultt
hatlittor
almaterial
saccumulatetherei
n. recordedt
hes
hi
f
tofv
egetatio
nfrommangrove
Themaino
bje
c
tofth
ep
rese
n
tworki
stoev
aluat
e for
estt
o midland forest.Pollen zone CH‑3th
emonthlys
edimentationratesint
henav
igation si
gni
fi
edt
hetot
a
labsenceofmangroveforestandchannel oft
he Damiettaharboru
sin
gB
ailar
d's i
s succeeded by the open land vegetation(1981)andRijn's(1991)formulae.Thedat
aused dominated by Chenopodiaceae and ot
her non‑int
hepr
esent work were obtaine
ddur
ingt
he arboreal.Pollen zone CH‑4 exhibitedthere‑
bathymetricsurveyoft
heharborbyt
heCoastal emergence ofcore mangrove for
estv
egetation
Research Institutein August, 1998. The andpollenzoneCH‑5suggestedt
heprevalenceof
inv
est
igat
ionrev
ealedthatthesummerseasonis, deltai
cenvironmentwhereinbothmangrovesand
generally, characterized by lower monthly lan
dp
lant
sco‑existe
dinjuxtaposition. The
63sedimentat
10nrates(<0.
1X10 m month) with uppermost par
t of the Chandrapur profile
aminimumv
alu
eofabout0.027X106 面 month1 encompassing a tot
alperiod of300 year
shashatt
he mangrove for
est,albeitinoccurred in September,1998. Higher monthly suggested t), degradedform,existedtillrecentlyalongwitht
hesedimentat
10nrates(> 0.
1X 10 m month 1andp
lants.Thevaryingc
oncentration
sofmetalsgenerally,occurredi
nwinter,whereamaximum ls Co,Cr,Cu,Ni,V,ZnAs,Pb,Cdwerevalu
eof0.345X106 両 month1wasestimate
dfor suchaegisteredatdif
ferentlevelsindicatingt
heJanuary, 1999. These differences of rtr
essoftheecosystem.I
thasbeen
sedimentation ratesare mainly due tothe environmentals
hat these chemicals are mainlyrelativelystr
on
gstormst
hata
r
efr
equ
en
tt
ooccur inferred the use of fer
tilizers anddur
in
gt
hew
inte
rseason(January March).The incorporated by testicidesinagr
iculture. However, siltation,
annual sedimentationrat
e was esti
matedto be putrophicat
ion and industr
ial development areabout l.38X 106 両 yr,
1 of thisvaluethe emajorthr
eateningfactorsaffectingthesensitiv
itysuspended‑loadt
rans
por
tc
ontr
ibut
e
dabout20%,
oflake,itsshrinka
geandtota
ldi
sa
ppe
ar
anc
eo
f
whichisi
nagreementwitht
heot
he
rest
imate
ssur
r
ou
n
di
ngv
egetation.
tha
thadbeendonei
nthisarea.
Holoceneevolutiono
fmangrovevegetationatChandrapur,ChilkaLake,Orissa,Indiai
nrelationt
opollutio
nandanthropogenicimpact
KhandelwalASHA1*& KohliDEEP
AK2
1
BirbalSahniInstituteo
fPalaeobot
any,
53,
Univ
er
sityroad,
Lucknow226007*
E‑
mail:ashakh
andelw
al@yahoo.com
2SecretariatA
dministrativ
eDepartment,
U.
P.
Secretariat,Lucknow226001
Chilka Lake lyi
ng along theeasterncoast ofOrissaStatei
soneoftheecologica
lands
ocio
‑
economical important wetlands of I
ndia. Thislarges
topenlagoonofAsiacoveringana
reaof1165s
q.kmi
sshowingalarmingenvironmental
degradation. The fine resolution

Quantifyingthemorphologicalchangeso
ftheGangesi
nBangladeshusingg
eospatialdata
AshrafM.DEWAM&YasushiYAMAGUCHI
GraduateSchoolofEnv
ironmentalStudies,Nagoya
University,Bangladesh
The objectiv
e of this paper was toquantify
morphological changes ofthe Ganges basinin
Bangladesh by using geospatial data. Twohistor
ica
lmapsalongwithremotelysensedd
ata
between1930and2007wereacquiredandusedt
oquantifyt
he changes inr
iv
er morphology. I
naddi
tion,hydrologi
caldatadur
ing 1951‑2007
were collected and i
ncor
por
ate
dint
hi
sstudy.
Firs
tofa
ll,topographicmapswerescannedand
r
ecti
fie
dt
ot
heUTMsystem.Usingt
herectified1
13