Coastal research on protection, environment and utilization
1. Coastal processes and shore protection2. Regional Sediment Transport (from a forest to a coast
through a river)3. Nearshore current system4. A-P relationship of Inlet 5. Protection of turtle nesting beaches6. Monitoring of waves and environments7. Monitoring of nearshore environment in Fukushima8. etc.
Prof. Ryuichiro Nishi(Advisor to President) Faculty of Fisheries, Kagoshima University
Major Research topics;
Research Themes of Coastal Environment Lab.
Location of our University and coastal environment in Kagoshima Pref. Kagoshima Pref. is 600km long (nearly 1/5 of Japan length). The length of coastal line is nearly 2,700km ( length of coastal line in Japan is 35,000km)
Kagoshima Univ.
Kagoshima University is on Kagoshima Bay and between the Pacific Ocean and East China Sea.
Mt. Sakutajima
Coastal disasters; save coastal community and coast
Research themes
Shore protection; stability of coastal structures
Hokkaido
Kagoshima
Shore protection; beach nourishment in Japan
0 10 20 30 400
50000
100000
150000
200000
250000
300000
Volu
me o
f nourish
ment(
m3 )
Index number of project
Volume of nourishment
Annual beach nourishment
0 2 4 6 8 10 12 14 16 180
200
400
600
800
1000
Pro
ject
lengt
h (
m)
Index number of project
Project length
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 20020
10000
20000
30000
40000
50000
60000
70000
80000
Volu
me o
f be
ach n
ourish
ment
(m3 )
Project year
Shizuoka coast, Shizuoka Pref.
Photo. By Prof. Dean
Inlet; A-P relationship and inlet stability
106 107 108 109
100
1000
10000
100000
狭口
断面
積 (m
2)
タイダルプリズム(流量) (m3)
Japan China U.S.A. New Zealand Vietnam India
A-P relationships in different countries;Japan; A = 1.291 10-4P0.955
China; A = 1.748 10-4P0.980
U.S.A.; A = 1.53 10-4P0.954
New Zealand (North Island and total);A = 1.68 10-4P0.950
A = 1.051 10-5P1.137
Vietnam; A = 3.041 10-13.0P2.056
India; A = 2.420 10-4P0.913
A global A-P relationship;A = 1.750 10-04P0.952
P = 9116A1.054
Breaking waves in coastal water
0 2 4 6 8 10 12 14 160
1
2
3
4
5
6
7
8
9
10
Sig
nific
ant
wav
e he
ight
(m)
D ata num ber (every one hour)
S ign ificant wave height during a storm ST .1 ST .2 ST .4
4 5 6 7 8 90.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
GA
MM
A(H
2/h 2,H
4/h 4)
Significant wave height(m)
GAMMA(H/h) for stable wave height over a coral reef
ST.2 ST.4
0 2 4 6 8 10 12 14 160
1
2
3
4
5
6
7
8
9
10
11
12
13
Wav
e p
erio
d (s
ec)
Data number (every one hour)
Wave period of significant wave ST.1 ST.2 ST.4
Coastal geomorphology
A spawning area of silver-stripe round herring
Coastal lake砂嘴
Island raised from sea bottom
Wind blowout on a sand dune
Sand spit
Coral reef (data by JCG)
Cliff erosion
1985 1990 1995 2000 2005 20100
1000
2000
3000
4000
5000
6000
7000
8000
上陸
数
年
宮崎県デ-タ 鹿児島県デ-タ
Sea turtle protection& beach preservation
Miyazaki Pref.Kagoshima Pref.
Year
Num
ber o
f lan
ding
s
Regional transport of sediment and nutrients
Nearshore current system; for a reduction of drowning accidents in coastal water
0 2 4 6 8 10 12 14 16 18 20 22 24 260.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
20 m
inut
es a
vera
ge v
el.(
m/s
) & T
idal
lev
el(m
)
E llapsed time(day)
20 m inutes average velocity(m/s) Tidal level(m )
・1,731 drowning accidents happened in rivers, lakes and coast in Japan in 2001, in which 1,058 people were dead .・963 drowning accidents happened in the sea in which 333 people passed away (35%) in Japan in 2003. ( JCG annual report)
Protection of carbonate beach
Simulation; for an environmental assessment
tVQ
ece
in
eVtV 1)(
Coastal environment; Coastal forest & monitoring techniques
Inner structure of coastal forest on a barrier island
How wonderful to discover something and apply the knowledge to realize a sustainable development!
Thank you very much for your kind attention!
Q&A time!
How wonderful to learn! R.Nishi
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